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Influence of polystyrene microplastics on bioconcentration and metabolism of 2-ethylhexyl diphenyl phosphate in common carp(Cyprinus carpio) 认领 引用
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作者 Zhihui Zhong Jingyao Wang +6 位作者 Hongxia Zhao Jia Zhao Tadiyose Girma Bekele Huihui Wan Yuming Sun Xintong Li Xiaonuo Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第8期1-10,共10页
The synergistic effects of microplastics(MPs)and co-existing pollutants,particularly their impact on aquatic organisms,is an emerging concern.The influence of MPs on the bioconcentration and biotransformation of organ... The synergistic effects of microplastics(MPs)and co-existing pollutants,particularly their impact on aquatic organisms,is an emerging concern.The influence of MPs on the bioconcentration and biotransformation of organophosphate flame retardants(OPFRs)in organisms remains poorly understood.This study investigated the impact of polystyrene microplastics(PS-MPs)on the bioconcentration and metabolism of 2-ethylhexyl diphenyl phosphate(EHDPHP),a specific OPFR,in common carp.Results indicated that the adsorption kinetics of PSMPs on EHDPHP conformed to the pseudo-second-order kinetic model(R2>0.961),indicating a high adsorption capacity.Both the linear model(R2=0.995)and Freundlich model(R2=0.996)described effectively the adsorption isotherms.Compared with EHDPHP exposure alone,the presence of PS-MPs potentially reduced the bioconcentration of EHDPHP in fish tissues without significantly altering its distribution.Notably,the bioconcentration factors(BCFs)and half-life(t1/2)of EHDPHP were elevated in fish.Furthermore,14 metabolites,primarily formed through hydroxylation metabolism,were identified,suggesting that PS-MPs may amplify EHDPHP's hydroxylation process.These results offer critical insights into the environmental behavior and risk assessments of MPs and OPFRs,underscoring the need for comprehensive ecological studies in this area. 展开更多
关键词 2-Ethylhexyl diphenyl phosphate Polystyrene microplastics Bioconcentration Metabolism Adsorption Common carp
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Weed Species Associated with Cacao Cultivation Exhibiting Phytoremediation Potential for Cadmium and Lead:A Study Based on Bioconcentration and Translocation Factors 认领 引用
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作者 Lorena E.Romero-Chávez Emilee Calero-Rios +5 位作者 Uriel Aldava-Pardave Elvis Ottos-Díaz Noelito Salgado-Veramendi Eldhy S.Huerto-Pajuelo Carolina Ibarra-Porras Richard A.Solórzano-Acosta 《Phyton-International Journal of Experimental Botany》 SCIE 2026年第6期346-365,共20页
The exploration and identification of spontaneous weed species in heavy metal–contaminated soils represent a relevant approach for understanding the role and their potential application in phytoremediation.In cacao c... The exploration and identification of spontaneous weed species in heavy metal–contaminated soils represent a relevant approach for understanding the role and their potential application in phytoremediation.In cacao cultivation,cadmium contamination poses a significant risk due to the restrictions established for soils and cacao-derived products,thereby threatening productive sustainability and export viability.The objective of this study was to identify weed species associated with cacao cultivation exhibiting accumulation patterns and phytoremediation potential for Cd and Pb,through the assessment of biomass production and the bioconcentration factor(BCF)and translocation factor(TF),in natural conditions.Soil samples were collected from seven cacao-growing zones,and the site with the highest Cd concentration(1.65 mg kg−1)was selected,where ten dominant weed species were identified and evaluated.Significant interspecific differences were observed in biomass production and in Cd and Pb concentrations(p<0.05).Talinum paniculatum exhibited the highest total biomass(6.15 g)and the highest TF for Cd,whereas Cyperus aggregatus showed the greatest total Cd accumulation(2.68 mg kg−1).BCF and TF values enabled the identification of species with accumulation patterns consistent with Cd phytoextraction(T.paniculatum,C.aggregatus,Pseudelephantopus spiralis,Bidens riparia,Euphorbia heterophylla,and Malvastrum coromandelianum)and with phytostabilization(Ocimum campechianum).For Pb the observed patterns were consistent with potential phytoextractive behavior in B.riparia,P.spiralis,E.heterophylla,Hilleria latifolia,and Acalypha stachyura.Although these results do not constitute functional evidence of remediation,they describe heavy metal accumulation and translocation patterns in native weed species,providing a technical basis for the design of future experimental trials aimed at the sustainable remediation of contaminated soils. 展开更多
关键词 Spontaneousweeds cadmium lead plant biomass bioconcentration factor translocation factor rhizosphere
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Seasonal bioconcentration of heavy metals in Onchidium struma(Gastropoda:Pulmonata)from Chongming Island,the Yangtze Estuary,China 认领 引用 被引量：8
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作者 LI Xiaobo JIA Linzhi +2 位作者 ZHAO Yunlong WANG Qun CHENG Yongxu 《Journal of Environmental Sciences》 SCIE EI CAS 2009年第2期255-262,共8页
The seasonal concentration changes of selected heavy metal Cd, Cr, Cu, Fe, Mn, Pb, and Zn in five tissues of marine gastropod Onchidium struma were studied in the Chongming Island, the Yangtze Estuary in April 2007, J... The seasonal concentration changes of selected heavy metal Cd, Cr, Cu, Fe, Mn, Pb, and Zn in five tissues of marine gastropod Onchidium struma were studied in the Chongming Island, the Yangtze Estuary in April 2007, July 2006, September 2006, and November 2006, respectively. The results demonstrated that the bioconcentration factor of Cu （biomass/water） in all selected tissues was about 104 magnitudes, Fe and Cd were 103, Zn was 102, and Mn, Pb, and Cr were 101. Hepatopancreas was proven to be the dominant storage tissue of Cr, Cu, Mn, and Zn, whereas Fe and Pb were mainly stored in muscle and digenetic gland, and Cd was stored in vitelline gland and albumen gland. Additionally, it was found that Cu, Fe, Mn, and Zn were concentrated significantly by O. struma （whole-body） in summer or autumn, and Cd, Cr, and Pb increased slightly in spring and winter. Furthermore, the bioconcentration of Cr was nearly 2-fold higher and Zn was 1.6-fold higher in the water compared with the Water Quality Standard for Fisheries. With view of excessive amount of Pb, Cd, and Cu according to seafood standard, the consumption of O. struma might have the risk of health hazard. 展开更多
关键词 Onchidium struma heavy metal bioconcentration the Yangtze Estuary
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Estimation and Prediction of Bioconcentration Factors of Nonionic Organic Chemicals in Fish by Electrotopological State Indices and Structural Parameter 认领 引用 被引量：9
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作者 冯长君 杨伟华 沐来龙 《Chinese Journal of Structural Chemistry》 SCIE CAS 北大核心 2008年第5期575-587,共13页
Based on the characteristics of atom types, Hall＇s electrotopological state indices （En） are calculated for 165 nonionic organic compounds. On the basis of the characteristics of substituent and conjugated matrix, ... Based on the characteristics of atom types, Hall＇s electrotopological state indices （En） are calculated for 165 nonionic organic compounds. On the basis of the characteristics of substituent and conjugated matrix, a novel molecular structure parameter （G） is defined and calculated for 165 molecules in this paper. En and G show good structural selectivity for organic molecules. G, a satisfactory relationship between bioconcentration factor （BCF） and En, is expressed as： 1gBCF = -0.283 ＋ 1.246G ＋ 0.079E42 ＋ 0.351E9- 0.063E17 （n＇ = 122, R = 0.967, F = 425.636, s = 0.394）, which could provide estimation and prediction for the lgBCF of nonionic organic chemicals. Furthermore, the model is examined to validate overall robustness with Jackknife tests, and the independent variables in model do not exist cross correlation with VIF. All these regression results show that the new parameter G and electrotopological state index have good rationality and efficiency. It is concluded that the En and G will be used widely in quantitative structure-property/activity relationship （QSPR/QSAR） research. 展开更多
关键词 nonionic organic compound bioconcentration factor electrotopologicai state index structure parameter QSAR
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Bioconcentration of polycyclic aromatic hydrocarbons in roots of three mangrove species in Jiulong River Estuary 认领 引用 被引量：7
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作者 LUZhi-qiang ZHENGWen-jiao MALi 《Journal of Environmental Sciences》 SCIE EI CAS 2005年第2期285-289,共5页
The polycyclic aromatic hydrocarbons(PAHs) concentrations were determined in the root of three mangrove species(Kandelia candel, Avicennia marina and Bruguiera gymnorrhiza) and their growing environment(sediment) in m... The polycyclic aromatic hydrocarbons(PAHs) concentrations were determined in the root of three mangrove species(Kandelia candel, Avicennia marina and Bruguiera gymnorrhiza) and their growing environment(sediment) in mangrove wetlands of Jiulong River Estuary, Fujian, China. The total PAHs(16 parent PAHs) in mangrove sediments ranged from 193.44 to 270.53 ng/g dw, with a mean value of 231.76±31.78 ng/g dw. Compared with other mangrove and coastal marine sediments, the PAHs concentrations of all the sampling areas in this study were at relatively lower level. The total PAHs(13 parent PAHs) values varied from 30.83 to 62.73 ng/g dw in mangrove roots. Benzo[a]pyrene(five-ring), fluoranthene(four-ring) and pyrene(four-ring) dominated in mangrove sediments. Based on ratios of phenathrene/anthracene, fluoranthene/pyrene and fluoranthene/pyrene + fluoranthene, the main possible sources of surface sediment PAHs were identified as grass, wood or coal combustion for mangrove wetlands of Jiulong River Estuary. Naphthalene(two-ring) and phenathrene(three-ring) were the most abundant compounds in mangrove roots. Sediment-to-vegetation bioconcentration factors(BCF SV s) were calculated and their relationships with PAHs' physico-chemical properties were investigated. The average BCF SV s of PAHs for three mangrove species roots were almost all under the level of 1 except for naphthalene. Good linear relationship between BCF SV values for mangrove roots and PAHs water solubility, octanol-water partitioning coefficients was derived in present study. The solubility and the octanol-water partition coefficient were proved to be good predictors for the accumulation of PAHs in mangrove roots, respectively. 展开更多
关键词 mangrove PAHs Jiulong River Estuary bioconcentration factors
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Linear QSAR Regression Models for the Prediction of Bioconcentration Factors of Chloroanilines in Fish by Density Functional Theory 认领 引用 被引量：16
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作者 冯长君 杨伟华 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第6期830-834,共5页
Density functional theory（DFT）-B3LYP level with the 6-311G＊＊（d,p） basis set was used to calculate a set of molecular quantum chemical descriptors of 12 chloroanilines. Quantitative structure-activity relationshi... Density functional theory（DFT）-B3LYP level with the 6-311G＊＊（d,p） basis set was used to calculate a set of molecular quantum chemical descriptors of 12 chloroanilines. Quantitative structure-activity relationship（QSAR） models of the bioconcentration factors（BCF） of the anilines in fish were established using some of the following calculated descriptors： EHOMO, ENHOMO, ELUMO, ENLUMO, ΔE1（= ELUMO- EHOMO）, ΔE2（= ENLUMO- ENHOMO）, dipole moment（μ）, molecular volume（V）, vibrational energy of 0 K（Ev）, thermodynamic energy（E）, heat capacity（Cv）, entropy（Sm） and the charge of benzene ring（Qph）. Using the variable selection and leaps-and-bounds regression, the quantum chemical descriptors derived directly from the molecular structures were employed to develop a linear QSAR model between the bioconcentration factors（BCF） and two descriptors（Sm, ENHOMO） of 12 chloroanilines. Statistically, the most significant one is a two-parameter linear equation with the correlation coefficient（R^2） of 0.981 and cross-validated correlation coefficient（Rcv^2） of 0.967. The established QSAR model has good stability and predictability based on the results from Rcv2 of leave-one-out cross-validation, AIC, FIT and tα/2. The quantum chemical analyses were performed from two aspects of frontier molecular orbital and entropy. The results show that two structural describers are crucial to the bioconcentration activity of chloroanilines. 展开更多
关键词 chloroanilines bioconcentration factor density functional theory quantum chemical describers quantitative structure-activity relationship
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Bioconcentration kinetics of PCBs in various parts of the lifecycle of the tadpoles Xenopus laevis 认领 引用
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作者 ZHAO Rong-biao SUN Da-yu +2 位作者 FU Shan WANG Xiao-fei ZHAO Ru-song 《Journal of Environmental Sciences》 SCIE EI CAS 2007年第3期374-384,共11页
Polychlorinated biphenyls （PCBs） in Xenopus laevis have been reported only for a few congeners. Additionally, there is very little information on the ability of Xenopus laevis to bioconcentrate PCBs. To address thes... Polychlorinated biphenyls （PCBs） in Xenopus laevis have been reported only for a few congeners. Additionally, there is very little information on the ability of Xenopus laevis to bioconcentrate PCBs. To address these issues, the tadpole Xenopus laevis was exposed to Aroclor 1254 mixtures in water at room temperature for 110 d followed by an additional 110 d of nonspiked PCBs in the water for the control group. During the whole process, bioconcentration factors （BCFs） of PCBs ranged from 1180 to 15670. For most PCB congeners, the highest and lowest bioconcentrations of the kinetic curves were found to be remarkably simultaneous, respectively. All 141 PCB congeners under the same experimental conditions had no linear correlation on the lgBCF versus lgKow relationship. The relationship between lgBCFs and lgKow followed a parabolic pattern indicative of selective bioconcentration, suggesting that the kinetic curves of the PCB congeners observed in the lifecycle of the tadpoles may be concentrated due to the amphibian special species and internal metabolism. In contrast, lgBCFs for PCBs were inversely related to lgKow, suggesting that a metabolism of the higher Kow PCB congeners occurred. These results support the author＇s conclusion that the tadpole Xenopus laevis plays major roles in the bioconcentration of PCB congeners, and demonstrated that the exposure kinetic curves of PCB congeners are complex. Besides the amphibian metamorphous development, the lifecycle of the tadpole Xenopus laevis also may be of importance in determining the bioconcentration of PCB congeners. 展开更多
关键词 PCBs tadpole Xenopus laevis bioconcentration exposure kinetics
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Experimental Study on Diflubenzuron: Degradation in Freshwater and Bioconcentration in Mosquitofish Following Chronic Exposure 认领 引用 被引量：1
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作者 Nedjoua Zaidi Jean-Pierre Farine Noureddine Soltani 《Journal of Environmental Protection》 2013年第2期188-194,共7页
Diflubenzuron (DFB, trade name dimilin 25 WP) is a chitin synthesis inhibitor widely used against forest insect pests in Algeria. Prior to implementation of these products as chemical agents for mosquito control, know... Diflubenzuron (DFB, trade name dimilin 25 WP) is a chitin synthesis inhibitor widely used against forest insect pests in Algeria. Prior to implementation of these products as chemical agents for mosquito control, knowledge on their potential effects on non-target organisms and its behaviour in water are needed. Therefore, the present study was focused on DFB and aimed to use an HPLC procedure developed previously in order to obtain information on its degradation in freshwater and its bioconcentration in adult females of the fish Gambusia affinis (Cyprinodondiformes, Poeciliidae), which is one of the best candidates for biological control programs against mosquitoes. The adult females were exposed to dimilin (initial concentration 312 ng a.i./ml) for 28 days and residues analysis determined at different exposure times (0, 7, 14, 21 and 28 days). The concentration of DFB in freshwater decreased with exposure time while the amount of residues detected at the surface of the fish body increased progressively to reach a maximum at day 14 (162.7 ± 14.0 ng/fish) and declined thereafter during the exposure period. In addition, DFB incorporation into body increased with decreasing DFB concentration in water at each exposure time. The following average distribution was noted at the end of experiment (28 days): about 33% of the applied concentration was detected on the surface of fish body and was recovered by simple rinsing, and about 67% was found inside the fish body. A degradation in water and surface of fish occurred starting day 14 during the experimental period. Thus, about 40% of the initial concentration was degraded in freshwater after 28 days. The results are discussed to develop a better understanding of the degradation of dimilin in water and their potential effect on non-target organisms for its application for controlling mosquito. 展开更多
关键词 Diflubenzuron Dimilin Gambusia Affinis Residues HPLC Degradation Bioconcentration
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Selected Heavy Metals in Water and Sediments and Their Bioconcentrations in Plant (Polygonum pulchrum) in Sosiani River, Uasin Gishu County, Kenya 认领 引用 被引量：1
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作者 Judith K. Jepkoech Gelas M. Simiyu Musa Arusei 《Journal of Environmental Protection》 2013年第8期796-802,共7页
Heavy metals’ availability and accumulation along the food chain pose public health risks. Water, sediment and plant samples were collected from selected sampling sites along Sosiani River, Uasin Gishu County, Kenya.... Heavy metals’ availability and accumulation along the food chain pose public health risks. Water, sediment and plant samples were collected from selected sampling sites along Sosiani River, Uasin Gishu County, Kenya. The sediment and plant samples were dried in the oven at 50°C to constant weight and digested in a mixture of acids according to standard procedures. The water samples, sediments and plants digests were analyzed for selected heavy metals using Atomic Absorption Spectrophotometer (model AAS Variant 200). The site near the Moi Teaching and Referral Hospital (MTRH) had the highest total heavy metals concentration in water: Cu (0.18 ± 0.04 ppm);Pb (0.46 ± 0.09 ppm) and Zn (0.70 ± 0.22 ppm) and sediments: Cu (1.62 ± 0.14 ppm);Pb (1.27 ± 0.17 ppm) and Zn (6.73 ± 0.88 ppm) respectively. Fractionation of heavy metals in sediments showed low percentage solubility (Cu 9.3%;Pb 8.5%;Zn 4.2%). Concentration of zinc in studied plants was highest (3.60 ± 0.63 ppm), with a bioconcentration factor of 15.1 based on soluble zinc fraction. This indicates that conditions in the study area show preferential zinc metal uptake in plants and may lead to accumulation in exposed plants posing Zn exposure risks along the food chain. Suggestions are made for monitoring of heavy metals in food crops and aquatic organisms such as fish in the study area. 展开更多
关键词 Bioaccumulation Bioconcentration Factor Food Chain Exposure Risks
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Growth and Antimony Bioconcentration Characteristics of Wild Ramie(Boehmeria nivea)under Sb Stress in Different Valence States 认领 引用
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作者 Fulong YANG Jiecheng HAN +8 位作者 Yuan WEI Xiaoqi YANG Jinyun PENG Zhi WEI Xiaolian YAN Beiyou ZHANG Qiaoshan LIU Jing ZHOU Guiyuan MENG 《Asian Agricultural Research》 2023年第6期41-45,共5页
[Objectives] To explore the effects of antimony(Sb) in different valence states on the growth and Sb bioconcentration and transfer of wild ramie(Boehmeria nivea). [Methods] A pot experiment was conducted to study the ... [Objectives] To explore the effects of antimony(Sb) in different valence states on the growth and Sb bioconcentration and transfer of wild ramie(Boehmeria nivea). [Methods] A pot experiment was conducted to study the effects of Sb(Ⅲ) and Sb(Ⅴ) stress on plant height, biomass, leaf SPAD value, Sb contents in various organs, Sb bioconcentration and transfer factors, and other indexes. [Results] Both kinds of Sb treatments showed a trend of "first increasing and then decreasing" in plant height as Sb concentration increased. The plant heights in Sb(Ⅲ) treatments with a concentration lower than 1 000 mg/kg and Sb(Ⅴ) treatments with concentrations lower than 4 000 mg/kg were significantly higher than that of the control check(CK);and the Sb(Ⅲ) treatment of the high concentration(4 000 mg/kg) resulted in a significant decrease in plant height, while the 8 000 mg/kg Sb(Ⅴ) treatment still showed an increase in plant height, indicating that the toxicity of Sb(Ⅴ) to wild ramie was significantly lower than that of Sb(Ⅲ). The Sb(Ⅲ) treatments with a concentration lower than 2 000 mg/kg had little effect on the dry weight of the aboveground part, while the treatment with a higher concentration showed a significant decrease;and the dry weights in various concentrations of Sb(Ⅴ) treatments showed no significant differences, but they were significantly higher than the CK and corresponding concentration of Sb(Ⅲ) treatment. Both types of Sb stress could promote the increase of SPAD value in wild ramie leaves, and the performance was significantly higher than the CK. As the concentration of Sb treatment increased, the Sb content in both the aboveground and underground parts showed a significant increase;and the comparison of Sb content under corresponding concentrations of the two types of Sb treatments showed that in the aboveground part, Sb(Ⅲ) was higher than Sb(Ⅴ), while in the underground part, the opposite was true. The bioconcentration factor(BF) of Sb decreased with the increase of Sb treatment concentration overall, and the value of Sb(Ⅴ) was smaller than that of Sb(Ⅲ), but both kinds of Sb stress were significantly smaller than the CK. The transfer factor(TF) of Sb in wild ramie showed a trend of "increasing first and then decreasing" with the concentration of Sb treatment, and various treatments of Sb(Ⅲ) were higher than the CK, with significant differences, while among various treatments of Sb(Ⅴ), except treatment B3, the reduction of which was not significant, other Sb(Ⅴ) treatments showed significant decreases. Comparing the two types of Sb treatments, the BF and TF values of Sb in wild ramie under Sb(Ⅲ) treatments were higher than those under Sb(Ⅴ) treatments, and the TF reached a significant level, indicating that the Sb transport ability of wild ramie under Sb(Ⅲ) treatments was stronger. [Conclusions] This study provides a theoretical basis for the mining of wild ramie Sb restoration genes and the application of large-scale cultivation in ecological restoration. 展开更多
关键词 Antimony Wild ramie Growth Antimony bioconcentration
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BIOCONCENTRATION OF TETRACHLOROBENZENE IN MARINE ALGAE 认领 引用
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作者 王修林 马延军 +2 位作者 程刚 郁纬军 张力军 《Chinese Journal of Oceanology and Limnology》 1997年第3期193-198,共6页
Bioconcention of tetrachlorobenzene(TeCB) in Chlorella marine, Nannochloropsis oculata,Pyramidomonas sp., Platymonas subcordiformis,and Phaeodactylum tricornutum;and toxicity of TeCB to the marinealgae were tested.Val... Bioconcention of tetrachlorobenzene(TeCB) in Chlorella marine, Nannochloropsis oculata,Pyramidomonas sp., Platymonas subcordiformis,and Phaeodactylum tricornutum;and toxicity of TeCB to the marinealgae were tested.Values of bioconcentration potential parameters,including uptake rate constant k1,elimination rate constant k2 and bioconcentration factor BCF, were obtaintal not only from the time course of TeCB uptake by the marine algae by using a bioconcentration model,but also from the acute toxicity test data for percent inhibition P (%) ~ exposure concentration of TeCB-time by using a combined bioconcentration and probability model. The results showed good relationship between k1(TOXIC) and k1(UPTAKE),and k2(TOXIC),k2(UPTAKE), and BCFD(TOXIC) and BCFD(UPTAKE). Especially,the values of BCFD(TOXIC) were well consisten with those of BCFD(UPTAKE). 展开更多
关键词 tetrachlorobenzene phytoplankton bioconcentration toxicity
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Distributions and influencing factors of selenium in soils and edible wild mushrooms and the development and utilization of high-quality wild mushrooms(Boletus,Ramaria botrytoides,Russula virescens) 认领 引用
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作者 Lei Xu Meng-sheng Zhao +5 位作者 Yan-xun Cheng Yao-tang Zhang Ji-yun Guan Fang-fang Lu Chang-wei Linghu Yong-sheng Yuan 《China Geology》 CAS CSCD 2026年第2期290-302,共13页
Selenium(Se)serves as a trace element essential for the human body owing to its significant physiological functions and extensive pharmacological effects.The Se required by the human body is primarily obtained from so... Selenium(Se)serves as a trace element essential for the human body owing to its significant physiological functions and extensive pharmacological effects.The Se required by the human body is primarily obtained from soil-derived foods.This study revealed Se-rich soils covering a certain area and Se-rich edible wild mushrooms with high Se accumulation rates in Chuxiong,central Yunnan Province,China through a geochemical survey of soil quality.Furthermore,this study investigated the Se migration and transformation mechanisms in the soil-wild mushroom system,aiming to provide a scientific basis for the development and planning of Se-rich green foods in the study area.Using the geochemical data of samples collected from topsoils,deep soils,and wild mushrooms and their root soils in Nanhua County,Chuxiong,this study analyzed the Se contents in soils and wild mushrooms and their root soils and explored the mechanisms and influencing factors of Se enrichment in wild mushrooms.The results indicate that the topsoils in the study area exhibit Se contents ranging from 0.07 mg/kg to 0.95 mg/kg,with an arithmetic average of 0.25 mg/kg.The Se-rich soils cover an area of 356 km2,which accounts for 13.07% of the total topsoil area.The wild mushrooms in the study area display Se contents varying from 0.004 mg/kg to 47.10 mg/kg,with a median of 0.977 mg/kg.The analyses of Moran’s index and semivariogram indicate that the Se content distributions in both topsoils and deep soils in the study area exhibit distinct spatial structures.Specifically,the semivariogram model for the Se content in the deep soils emerges as a Gaussian model,and the Se content exhibits a nugget-to-sill ratio of 21.72%,suggesting that the Se content in deep soils is primarily influenced by structural factors such as parent materials.Se in the soils originates primarily from soil-forming parent rocks,with the origin of the Se-rich soils closely related to Triassic black shales,thin coal seams,and metamorphic rocks in the Ailao Mountain area.The wild mushrooms in the study area enjoy significantly higher Se content than other reported naturally Se-rich agricultural products,with a Se accumulation rate of up to 92.31%and an overall over-limit ratio of Pb and Cd of merely 11.54%,suggesting that the study area has substantial potential for the development of naturally Se-rich green foods.The wild mushrooms in the study area exhibit bioconcentration factors(BCFs)of Se ranging from 0.02 to 157.00(median:4.26),with Se bioavailability decreasing in the order of Boletus edulis,Boletus aereus,Leccinum nigrescens,Ramaria botrytoides,and Russula virescens.For the Se absorption and enrichment in the wild mushrooms,the primary controlling factor is identified as the wild mushroom species.Furthermore,they are significantly influenced by the Se content in soils but are minimally affected by the physicochemical indicators of soils. 展开更多
关键词 Selenium Wild mushroom Boletus Ramaria botrytoides Russula virescens Soil Bioconcentration factor Influencing factor Nanhua County Geochemical geological survey engineering Sustainable Development Goals No.1(No Poverty) Sustainable Development Goals No.2(Zero Hunger)
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Digital mapping of pesticides bioconcentration by integrating remote sensing techniques and plant uptake model 认领 引用 被引量：1
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作者 Chenyang Xu Shuangqiao Liao +2 位作者 Minghao Lin Qian Yue Jizhe Xia 《International Journal of Digital Earth》 SCIE EI 2023年第1期2152-2167,共16页
Although pesticides have been widely used worldwide to enhance crop yield and product quality,most pesticides are harmful to the environment and human health.Plants absorb pesticides mainly from air and soil.Therefore... Although pesticides have been widely used worldwide to enhance crop yield and product quality,most pesticides are harmful to the environment and human health.Plants absorb pesticides mainly from air and soil.Therefore,the soil-plant pathway is essential for pesticide absorption.Bioconcentration factor(BCF)has extensively been applied to evaluate potential plant contamination by pesticides from soil.Hence,this study developed a simplified plant transpiration-based plant uptake model(PT-model)to estimate plant pesticides’BCF from soil based on plant transpiration.Remote sensing techniques were employed to generate spatiotemporal continuous plant transpiration via evapotranspiration.Pesticide BCF mapping was achieved by integrating PT-model with Moderate Resolution Imaging Spectroradiometer(MODIS)remotely sensed data.The results were compared with a verified model driven by relative humidity and air temperature(RA-model),which has been confirmed byfindings from previous studies.The estimated BCF was within the boundaries of the RA-model,indicating the simulation’s overall acceptability.In this study,the BCF temporal trend estimated by the proposed method agreed with the RA-model assimilating meteorology datasets,while the spatial distribution was partially inconsistent.Overall,the proposed method generates the spatiotemporal patterns of pesticide BCF with relatively consistent results supported by previous records andfindings. 展开更多
关键词 Pesticide bioconcentration factor evapotranspiration plant uptake model remote sensing
Basal application combined with topdressing and foliar application of silicon and selenium fertilizers reduces soil cadmium and lead bioavailability and their translocation to brown rice 认领 引用 被引量：1
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作者 Jingyi HU Ronghao TAO +3 位作者 Xinyun XIE Hongjuan LU Xiaojun SHI Wenling YE 《Pedosphere》 SCIE CAS CSCD 2025年第4期667-677,共11页
Soil and foliar applications of silicon(Si)and selenium(Se)fertilizers can inhibit the transfer of heavy metals from the soil to crops.However,it remains unclear how Si and Se affect the bioavailability of cadmium(Cd)... Soil and foliar applications of silicon(Si)and selenium(Se)fertilizers can inhibit the transfer of heavy metals from the soil to crops.However,it remains unclear how Si and Se affect the bioavailability of cadmium(Cd)and lead(Pb)in soil and thereby their transfer to rice in Cd and Pb-polluted fields.In this study,seven treatments were set up in a field experiment conducted in a nonferrous metal mining area in Tongling City,Anhui Province,China:no Si/Se fertilization control(CK),basal Si/Se fertilization(Si-1/Se-1),basal and topdressing Si/Se fertilization(Si-2/Se-2),and basal,topdressing,and foliar Si/Se fertilization(Si-3/Se-3).The results indicated that compared to CK,rice yield increased by 3.94%-14.56%in the other treatments,with the most significant increase observed in Si-3 and Se-3.Additionally,the Cd content in brown rice decreased by 15.42%-51.55%,while Pb content decreased by 16.49%-47.18%.In all treatments except Si-1,both metal contents decreased to below the limits specified in China's food safety standard(GB 2762-2022).Furthermore,they impeded the translocation of these metals to the brown rice,thereby effectively diminishing metal accumulation in rice grain.The effect of Se fertilizer was better than Si fertilizer in decreasing the bioconcentration factors of Cd and Pb and inhibiting their translocation to brown rice.At the same time,the applications of Si and Se increased the Si and Se contents of rice aboveground parts,respectively,and the Se content of brown rice in Se-3 increased by 77.56%,meeting the Se enrichment standard(GB/T 22499-2008).The contents of diethylenetriamine pentaacetic acid-extractable Cd and Pb in soil decreased in all Si/Se treatments by 25.53%and 22.37%in Se-3,respectively.All Si/Se treatments reduced the acid-exchangeable and reducible Cd and Pb in soil and transformed them into the more stable oxidizable and residual fractions.This study revealed that the bioavailability of Cd and Pb in soil and their translocation to brown rice were significantly reduced by the basal application combined with topdressing and foliar application of Si and Se fertilizers. 展开更多
关键词 bioconcentration factor heavy metal fractionation heavy metal pollution husk metal mining translocation factor
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Variation of Cd concentration in various rice cultivars and derivation of cadmium toxicity thresholds for paddy soil by species-sensitivity distribution 认领 引用 被引量：50
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作者 SONG Wen-en CHEN Shi-bao +4 位作者 LIU Ji-fang CHEN Li SONG Ning-ning LI Ning LIU Bin 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2015年第9期1845-1854,共10页
It is imperative to derive an appropriate cadmium (Cd) health risk toxicity threshold for paddy soils to ensure the Cd con-centration of rice grains meet the food safety standard. In this study, 20 rice cultivars from... It is imperative to derive an appropriate cadmium (Cd) health risk toxicity threshold for paddy soils to ensure the Cd con-centration of rice grains meet the food safety standard. In this study, 20 rice cultivars from the main rice producing areas in China were selected, and a pot-experiment was conducted to investigate transformation of Cd in paddy soil-rice system with 0 (CK), 0.3 mg kg–1 (T1) and 0.6 mg kg–1 (T2) Cd treatments in greenhouse. The results showed that Cd concentrations of rice grains existed signiifcant difference (P<0.05) in 20 rice cultivars under the same Cd level in soil. The Cd concentrations of rice grains of the CK, T1 and T2 treatments were in the range of 0.143–0.202, 0.128–0.458 and 0.332–0.806 mg kg–1, respectively. Marked differences of the ratios of Cd concentration for soil to rice grain (BCFs) and transfer factors (TFs, root to grain and straw to grain) among the tested cultivars were observed in this study. The bioconcentration factors (BCFgrain) and TFs of the 20 rice cultivars were 0.300–1.112 and 0.342–0.817, respectively. The TFs of Cd from straw to grain ranged from 0.366 to 1.71, with signiifcant differences among these 20 rice cultivars. The bioconcentration factors (BCFgrain) and TFs among the 20 rice cultivars ranged from 0.300–1.112 and 0.342–0.817, respectively. The species-sensitivity distribu-tion (SSD) of Cd sensitivity of the rice species could be iftted wel with Burr-III (R2=0.987) based on the data of BCFs. The toxicity threshold of Cd derived from SSD for the paddy soil was 0.507 mg kg–1 in the present study. 展开更多
关键词 cadmium rice cultivars bioconcentration factor species-sensitivity distribution toxicity thresholds
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Cadmium Accumulation and Translocation in Two Jerusalem Artichoke(Helianthus tuberosus L.) Cultivars 认领 引用 被引量：19
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作者 CHEN Liang LONG Xiao-Hua +3 位作者 ZHANG Zhen-Hua ZHENG Xiao-Tao Z. RENGEL LIU Zhao-Pu 《Pedosphere》 SCIE CAS CSCD 2011年第5期573-580,共8页
Jerusalem artichoke(Helianthus tuberosus L.) not just can be used for bioethanol production but may be potentially used in phytoremediation for the removal of heavy metal pollutants.Two Jerusalem artichoke cultivars,N... Jerusalem artichoke(Helianthus tuberosus L.) not just can be used for bioethanol production but may be potentially used in phytoremediation for the removal of heavy metal pollutants.Two Jerusalem artichoke cultivars,N2 and N5,were subjected to six cadmium(Cd) concentrations(0,5,25,50,100 and 200 mg L1) to investigate Cd tolerance and accumulation.After 21 days of growth,the effects of Cd on growth,chlorophyll content,net photosynthetic rate,intercellular CO2 concentration and malondialdehyde content were evaluated.Most growth parameters were reduced under Cd stress.The two Jerusalem artichoke cultivars had relatively high Cd tolerance and accumulation capacity(> 100 mg kg1),with N5 being more tolerant and having higher Cd accumulation than N2.Roots accumulated more Cd than stems and leaves.The bioconcentration factors(far higher than 1) and translocation factors(lower than 1) decreased with an increase in Cd applied.The results suggested that Jerusalem artichoke could be grown at relatively high Cd loads,and N5 could be an excellent candidate for phytoremediation of Cd-contaminated soils. 展开更多
关键词 bioconcentration factor Cd-contaminated soils heavy metal phytoremediation tolerance index
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Accumulation and bioavailability of heavy metals in a soil-wheat/maize system with long-term sewage sludge amendments 认领 引用 被引量：12
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作者 YANG Guo-hang ZHU Guang-yun +3 位作者 LI He-lian HAN Xue-mei LI Ju-mei MA Yi-bing 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第8期1861-1870,共10页
A long-term field experiment was carried out with a wheat-maize rotation system to investigate the accumulation and bioavailability of heavy metals in a calcareous soil at different rates of sewage sludge amendment. T... A long-term field experiment was carried out with a wheat-maize rotation system to investigate the accumulation and bioavailability of heavy metals in a calcareous soil at different rates of sewage sludge amendment. There are significant linear correlations between the contents of Hg, Zn, Cu, Pb, and Cd in soil and sewage sludge amendment rates. By increasing 1 ton of applied sludge per hectare per year in soil, the contents of Hg, Zn, Cu, Pb, and Cd in soil increased by 6.20, 619, 92.9, 49.2, and 0.500 μg kg–1, respectively. For Hg, sewage sludge could be safely applied to the soil for 18 years at an application rate of 7.5 t ha–1 before content exceeded the soil environmental quality standards in China(1 mg kg–1). The safe application period for Zn is 51 years and is even longer for other heavy metals(112 years for Cu, 224 years for Cd, and 902 years for Pb) at an application rate of 7.5 t ha–1 sewage sludge. The contents of Zn and Ni in wheat grains and Zn, Cu, and Cr in maize grains increased linearly with increasing sewage sludge amendment rates. The contents of Zn, Cr, and Ni in wheat straws and Zn, Cu, and As in maize straws were positively correlated with sewage sludge amendment rates, while the content of Cu in wheat straws and Cr in maize straws showed the opposite trend. The bioconcentration factors of the heavy metals in wheat and maize grains were found to be in the order of Zn>Cu>Cd>Hg>Cr=Ni>Pb>As. Furthermore, the bioconcentration factors of heavy metals in wheat were greater than those in maize, indicating that wheat is more sensitive than maize as an indicator plant. These results will be helpful in developing the critical loads for sewage sludge amendment in calcareous soils. 展开更多
关键词 sewage sludge agricultural use heavy metals calcareous soil bioconcentration factors
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Contamination,Fractionation and Availability of Metals in Urban Soils in the Vicinity of Former Lead and Zinc Smelters,France 认领 引用 被引量：12
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作者 C.WATERLOT G.BIDAR +3 位作者 A.PELFRNE H.ROUSSEL H.FOURRIER F.DOUAY 《Pedosphere》 SCIE CAS CSCD 2013年第2期143-159,共17页
Soil contamination by metals from anthropogenic activities （e.g., mining and smelting） is a major concern for the environment and human health. Environmental availability of cadmium （Cd）, lead （Pb）, zinc （Zn）,... Soil contamination by metals from anthropogenic activities （e.g., mining and smelting） is a major concern for the environment and human health. Environmental availability of cadmium （Cd）, lead （Pb）, zinc （Zn）, copper （Cu）, and indium （In） in 27 urban soils located around two former Pb and Zn smelters in Northern France were studied by analysing the chemical forms of these metals and evaluating their phytoavailability. These metals were determined using flame or electrothermal absorption atomic spectrometry （FAAS or ETAAS）, depending on their concentration levels. After optimisation of the ETAAS method, characteristic mass of In in water and aqua regia were 9.9 and 18 pg, respectively, showing the high sensitivity of the analytical procedure. Metal partitioning was conducted using a four-step sequential extraction procedure. The results showed that Cd and Zn were mainly in the acid-extractable and reducible forms in the urban soils studied. In contrast, Pb and In were largely in the reducible fraction. However, in some samples, the amount of In extracted in the residual or exchangeable fraction was higher than that in the reducible fraction. Copper was mainly found in the reducible and residual fractions. A pot experiment was conducted in a glasshouse with seven soils （six contaminated and one uncontaminated） and two plant species, ryegrass and lettuce. The results showed transfer of metals from the contaminated soils to the shoots of ryegrass and the edible part of lettuce. The metal bioconcentration factor was in the order of Cd 〉〉 Cu 〉 In 〉 Zn 〉〉 Pb for lettuce leaves, whereas for ryegrass shoots, three orders were found, Cd 〉 Zn 〉 Cu 〉〉 In 〉 Pb, Cd 〉〉 In 〉 Zn 〉 Cu 〉〉Pb, and Zn 〉 Cd 〉 Cu 〉 In 〉〉 Pb, depending on the physico-chemical properties of the soils, such as pH, cation exchange capacity, carbonates, and organic matter. It was established that the metal toxicity was related to the contamination levels and the physico-chemical properties, including pH, organic matter, and in a lesser extent, Ca, Mg, and phosphorus contents, of the soils. However, it was shown that lettuce could grow on soils having high Cd and CaCO3 contents. Cadmium was one of the most available metals while Pb was always the least available in the soils studied. 展开更多
关键词 bioconcentration factor environmental availability metal toxicity sequential extraction soil physico-chemical property
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Phytoavailability of Copper, Zinc and Cadmium in Sewage Sludge-Amended Calcareous Soils 认领 引用 被引量：8
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作者 LI Qiong GUO Xue-Yan +3 位作者 XU Xing-Hua ZUO Yu-Bao WEI Dong-Pu MA Yi-Bing 《Pedosphere》 SCIE CAS CSCD 2012年第2期254-262,共9页
The toxicity of trace elements （TEs）, such as copper （Cu）, zinc （Zn）, and cadmium （Cd）, often restrict land application of sewage sludge （SS） and there was little information about soil-plant transfer of TEs... The toxicity of trace elements （TEs）, such as copper （Cu）, zinc （Zn）, and cadmium （Cd）, often restrict land application of sewage sludge （SS） and there was little information about soil-plant transfer of TEs in SS from field experiments in China. In this study pot and field experiments were carried out for 2 years to investigate the phytoavailability of TEs in calcareous soils amended with SS. The results of the pot experiment showed that the phytoavailability of Zn and Cu in the SS was equal to 53.4%-80.9% and 54.8%-91.1% of corresponding water-soluble metal salts, respectively. The results from the field experiment showed that the contents of total Zn, Cu, and Cd in the soils increased linearly with SS application rates. With increasing SS application rates, the contents of Zn and Cu in the wheat grains initially increased and then reached a plateau, while there was no significant change of Cd content in the maize grains. The bioconcentration factors of the metals in the grains of wheat and maize were found to he in the order of Zn 〉 Cu 〉 Cd, but for the straw the order was Cd 〉 Cu 〉 Zn. It was also found that wheat grains could accumulate more metals compared with maize grains. The results will be helpful in developing the critical loads of sewage sludge applied to calcareous soils. 展开更多
关键词 bioconcentration factor biosolids metal transfer trace elements
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Effects of soil amendments, foliar sprayings of silicon and selenium and their combinations on the reduction of cadmium accumulation in rice 认领 引用 被引量：7
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作者 Demin LI Hongyan LIU +2 位作者 Min GAO Jing ZHOU Jun ZHOU 《Pedosphere》 SCIE CAS CSCD 2022年第4期649-659,共11页
Agricultural soil contamination by cadmium (Cd) is becoming one of the most serious environmental issues and public concerns. In this study, factorial arrangements of treatments were designed to explore the effects of... Agricultural soil contamination by cadmium (Cd) is becoming one of the most serious environmental issues and public concerns. In this study, factorial arrangements of treatments were designed to explore the effects of two soil amendments, sodium sulfide-biofuel ash (SSBA) and lime (0.1%), and three foliar applications, silicon (Si, 2.5 mmol L-1), selenium (Se, 40 mg L-1), and their combination (SS), on Cd reduction in rice (Oryza sativa L.) in a pot experiment, which were then verified in a field experiment. Compared with the control without amendment but with spraying of deionized water, both SSBA and lime significantly reduced concentrations of CaCl2-extractable Cd in soil by 30%–39% and 31%–40% and Cd in brown rice by 44%–63% and 53%–72% in the pot and field experiments, respectively. Foliar Si, Se, and SS applications significantly reduced Cd accumulation in brown rice by 62%–64%, 72%–83%, and 39%–73%, respectively, increased rice grain yield, and improved antioxidant enzyme activities in rice leaves but with different trends in the pot and field experiments. Combinations of SSBA and lime with Si, Se, and SS had a non-significant synergistic effect on Cd reduction in brown rice compared to only foliar spraying or soil amendment in both pot and field experiments, although SSBA + Se and SSBA + Si reduced Cd concentration in brown rice by 16%–34% and 14%–24% compared to only foliar Si and Se and soil SSBA applications, respectively. Soil lime application and foliar Si spraying were the most cost-effective strategies to reduce Cd accumulation in brown rice in the field and pot experiments, respectively. Although soil amendments and foliar treatments were individually effective, their combinations failed to generate a significant synergistic reduction of Cd concentration in brown rice. 展开更多
关键词 antioxidant enzyme activity bioconcentration factor cadmium bioavailability rice yield soil contamination synergistic effect translocation factor
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