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双元液滴MEA-NaBH4与H2O2自燃点火特性:偏心碰撞的影响 认领 引用
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作者 张大尉 周杏薇 +2 位作者 宋斯铎 刘雪东 洪海升 《常州大学学报（自然科学版）》 CAS 2026年第3期51-62,共12页
本文研究了过氧化氢(H2O2)和单乙醇胺-硼氢化钠(MEA-NaBH4)液滴的偏心碰撞自燃点火过程,通过高速摄影机获得其碰撞点火过程图片,重点探究液滴混合、液滴加热和蒸发以及气相点火过程的特性和物理机制。与对心碰撞点火过程相比,偏心碰撞... 本文研究了过氧化氢(H2O2)和单乙醇胺-硼氢化钠(MEA-NaBH4)液滴的偏心碰撞自燃点火过程,通过高速摄影机获得其碰撞点火过程图片,重点探究液滴混合、液滴加热和蒸发以及气相点火过程的特性和物理机制。与对心碰撞点火过程相比,偏心碰撞点火过程同样可以分为5个阶段。当偏心度(B)<0.35时,观察到碰撞后的H2O2液滴会穿透MEA-NaBH4液滴并与之聚并,由于角动量的存在不会形成对心碰撞条件下的稳定球体,而是在内部旋转拉伸后膨胀点火。当B增加到0.59时,碰撞后的液滴分离形成一颗或多颗微小卫星液滴,并观察到多重点火模式。随着B增大到0.85,观察到液滴发生反弹碰撞,这时液滴虽然相互作用但不存在传质过程,从而导致点火失败。实验结果表明液滴点火延迟时间在不同的韦伯数(We)下随B线性减小,最终减小到同一最小值后保持不变。此外,本研究延续之前的工作,使用量化液滴膨胀速率的理论模型来计算液滴的体积变化,通过与实验结果对比发现液滴膨胀可归因于混合液滴内部过热H2O2的闪蒸,最终建立了不同液滴混合特征在We-B参数空间中对应的点火模式机理图。 展开更多
关键词 液滴碰撞 自燃点火 H2O2 液滴蒸发 MEA-NaBH4
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6-BA拮抗H2O2诱导下黄瓜离体子叶的衰老研究 认领 引用
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作者 黄艺颖 朱鑫雨 黄胜琴 《种子科技》 2026年第1期22-25,共4页
以黄瓜子叶为材料,探究了外源H2O2诱导植物衰老的机制及植物生长调节剂6-苄基腺嘌呤(6-BA)对H2O2的拮抗作用。研究发现,3%H2O2处理3 d是黄瓜子叶衰老的关键时期,H2O2通过促进细胞中超氧阴离子和内源H2O2的产生与积累导致衰老,而6-BA能... 以黄瓜子叶为材料,探究了外源H2O2诱导植物衰老的机制及植物生长调节剂6-苄基腺嘌呤(6-BA)对H2O2的拮抗作用。研究发现,3%H2O2处理3 d是黄瓜子叶衰老的关键时期,H2O2通过促进细胞中超氧阴离子和内源H2O2的产生与积累导致衰老,而6-BA能有效缓解并逆转H2O2引发的衰老过程,6-BA质量浓度为10 mg/L时,其延缓细胞衰老的效果最为显著。研究结果为作物衰老调控提供了新的理论依据,并为农业生产中作物早衰防控提供了技术参考。 展开更多
关键词 黄瓜子叶 衰老过程 H2O2 6-苄基腺嘌呤(6-BA)
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UV/H_2O_2/TiO_2催化氧化法对油田采出水中多环芳烃的处理效果 认领 引用 被引量：2
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作者 马虹 李婷 +1 位作者 陈冰 张小飞 《环境化学》 CAS CSCD 北大核心 2012年第12期1874-1877,共4页
针对油田采出水中含有多环芳烃种类多且较难去除的特点,选取了菲和芴两种代表性多环芳烃作为研究对象,采用UV/H2O2/TiO2技术对油田采出水中多环芳烃的处理效果进行了研究;考察了在254 nm波长紫外光照射下,TiO2投加量、H2O2投加量、pH值... 针对油田采出水中含有多环芳烃种类多且较难去除的特点,选取了菲和芴两种代表性多环芳烃作为研究对象,采用UV/H2O2/TiO2技术对油田采出水中多环芳烃的处理效果进行了研究;考察了在254 nm波长紫外光照射下,TiO2投加量、H2O2投加量、pH值和光照时间对水样中的菲和芴处理效果的影响.实验结果显示,处理初始浓度为1000μg.L-1的菲、芴时,TiO2用量为2.2 g.L-1、H2O2用量为0.12 mmol.L-1、pH值为7、光照时间1.5 h时,去除效果较好. 展开更多
关键词 油田采出水 多环芳烃 UV/H2O2/TiO2
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Mechanistic insights into sulfation-induced deactivation of CoMn2O4/CeTiOx catalyst under low-temperature SCR conditions 认领 引用 被引量：1
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作者 Ning Luo Fengyu Gao +5 位作者 Chengzhi Wang Honghong Yi Shunzheng Zhao Yuansong Zhou Shangfeng Du Xiaolong Tang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2025年第10期70-86,共17页
The problem of water and sulfur poisoning in flue gas atmosphere remains a significant obstacle for low-temperature deNOx catalysts.This study investigated the sulfation mechanism of the CoMn2O4/CeTiOx(CMC... The problem of water and sulfur poisoning in flue gas atmosphere remains a significant obstacle for low-temperature deNOx catalysts.This study investigated the sulfation mechanism of the CoMn2O4/CeTiOx(CMCT)catalyst during the selective catalytic reduction of NOx with NH3 under conditions containing H2O and SO2 at 150℃.Employing a comprehensive suite of time-resolved analysis and characterization techniques,the evolution of sulfate species was systematically categorized into three stages:initial rapid surface sulfate accumulation,the transformation of surface sulfates to bulk metal sulfates,and partial sulfates decomposition after the removal of H2O and SO2.These findings indicate that bulk metal sulfates irreversibly deactivate the catalyst by distorting active component lattices and consuming oxygen vacancies,whereas surface sulfates(including ammonium sulfates and surface-coordinated metal sulfates)cause reversible performance loss through decomposition.Furthermore,the competitive adsorption of H2O and SO2 significantly influences the catalytic efficiency,with H2O suppressing SO2 adsorption while simultaneously enhancing the formation of Brönsted acid sites.This research underscores the critical role of sulfate dynamics on catalyst performance,revealing the enhanced SO2 resistance of the Eley-Rideal mechanism facilitated by the Ce-Ti support relative to the Langmuir-Hinshelwood pathway.Collectively,the study unravels the complex interplay of sulfate dynamics influencing catalyst performance and provides potential approaches to mitigate deactivation in demanding atmospheric conditions. 展开更多
关键词 Selective catalytic reduction with NH3 CoMn2O4/CeTiOx H2O and SO2resistance Surface sulfate Bulk sulfate
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Insight into removal of dissolved organic matter in post pharmaceutical wastewater by coagulation-UV/H_2O_2 认领 引用 被引量：12
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作者 Feng Qian Mengchang He +2 位作者 Jieyun Wu Huibing Yu Liang Duan 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2019年第2期329-338,共10页
The removal of four dissolved organic matter(DOM) fractions, non-acid hydrophobics,hydrophobic acids, hydrophilics and transphilics, was achieved by coagulation-UV/H_2O_2 oxidation in post-pharmaceutical wastewater(Ph... The removal of four dissolved organic matter(DOM) fractions, non-acid hydrophobics,hydrophobic acids, hydrophilics and transphilics, was achieved by coagulation-UV/H_2O_2 oxidation in post-pharmaceutical wastewater(PhW W). Coagulation with Polyferric chloride(PFC), Polymeric ferric sulfate(PFS) and Polymeric aluminum ferric chloride(PAFC) was studied separately to evaluate the effects of the initial pH and coagulant dosage. The coagulation-UV/H_2O_2 oxidation method resulted in much higher reduction rates for dissolved organic carbon(DOC)(by 75%) and UV254(by 92%) than coagulation or UV/H_2O_2 oxidation alone. The proportion of non-acid hydrophobics, hydrophobic acids, transphilics and hydrophilics removed by coagulation was 54%, 49%, 27% and 12 %, while the combined treatment removed 92%, 87%,70% and 39%, respectively. Parallel factor analysis(PARAFAC) of fluorescence measurements revealed that the humic-like fluorescent component C4 showed the highest removal(by 44%)during the coagulation stage. After coagulation-UV/H_2O_2 treatment, the humic-like fluorescent component C3 had the highest removal(by 72%), whereas xenobiotic organic fluorescent components C1 and C4 remained recalcitrant to decomposition. Significant correlations(R2> 0.8)between C1 and the hydrophobic acids and non-acid hydrophobics suggested the possibility of using fluorescence spectroscopy as an effective tool to assess variations in DOM fraction treatment efficacy in coagulation-UV/H_2O_2 systems. After the combined treatment, toxic inhibition of cellular activity by post PhW W decreased from 88% to 47% and biodegradability increased from 0.1 to 0.52. 展开更多
关键词 Post PhWW Coagulation UV/H2O2 PARAFAC DOM fractionation Toxicity
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Increasing Surface UV Radiation in the Tropics and Northern Mid-Latitudes due to Ozone Depletion after 2010 认领 引用 被引量：7
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作者 Fei XIE Yan XIA +1 位作者 Wuhu FENG Yingli NIU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2023年第10期1833-1843,共11页
Excessive exposure to ultraviolet(UV)radiation harms humans and ecosystems.The level of surface UV radiation had increased due to declines in stratospheric ozone in the late 1970s in response to emissions of chloroflu... Excessive exposure to ultraviolet(UV)radiation harms humans and ecosystems.The level of surface UV radiation had increased due to declines in stratospheric ozone in the late 1970s in response to emissions of chlorofluorocarbons.Following the implementation of the Montreal Protocol,the stratospheric loading of chlorine/bromine peaked in the late 1990s and then decreased;subsequently,stratospheric ozone and surface UV radiation would be expected to recover and decrease,respectively.Here,we show,based on multiple data sources,that the May–September surface UV radiation in the tropics and Northern Hemisphere mid-latitudes has undergone a statistically significant increasing trend[about 60.0 J m–2(10 yr)–1]at the 2σlevel for the period 2010–20,due to the onset of total column ozone(TCO)depletion[about−3.5 DU(10 yr)–1].Further analysis shows that the declines in stratospheric ozone after 2010 could be related to an increase in stratospheric nitrogen oxides due to increasing emissions of the source gas nitrous oxide(N2O). 展开更多
关键词 surface UV radiation stratospheric ozone stratospheric chemistry N2O
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Experimental and model comparisons of H_2O_2 assisted UV photodegradation of Microcystin-LR in simulated drinking water 认领 引用 被引量：4
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作者 Lei LI Nai-yun GAO +6 位作者 Yang DENG Juan-juan YAO Ke-jia ZHANG Hai-jun LI Di-di YIN Hua-se OU Jian-wei GUO 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS 2009年第11期1660-1669,共10页
The degradation of Microcystin-LR (MC-LR) in water by hydrogen peroxide assisted ultraviolet (UV/H2O2) process was investigated in this paper. The UV/H2O2 process appeared to be effective in removal of the MC-LR. MC-L... The degradation of Microcystin-LR (MC-LR) in water by hydrogen peroxide assisted ultraviolet (UV/H2O2) process was investigated in this paper. The UV/H2O2 process appeared to be effective in removal of the MC-LR. MC-LR decomposition was primarily ascribed to production of strong and nonselective oxidant-hydroxyl radicals within the system. The intensity of UV radiation, initial concentration of MC-LR, MC-LR purity, dosages of H2O2, the initial solution pH, and anions present in water, to some extent, influenced the degradation rate of MC-LR. A modified pseudo-first-order kinetic model was developed to predict the removal efficiency under different experimental conditions. 展开更多
关键词 Microcystin-LR （MC-LR） Hydrogen peroxide assisted ultraviolet （UV/H2O2） process Hydroxyl radical Reaction kinetics Photochemical degradation
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Degradation of Microcystin-RR by Combination of UV/H_2O_2 Technique 认领 引用 被引量：1
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作者 Rui Ping QIAO Yong Min MA +4 位作者 Xin Hua QI Nan LI Xiang Can JIN Qi Shan WANG Yuan Yi ZHUANG 《Chinese Chemical Letters》 SCIE CAS 2005年第9期1271-1274,共4页
The experiments were performed to investigate the degradation of microcystins in order to assess the effectiveness and feasibility of UV/H2O2 system for the disinfection of water polluted by microcystins. The influenc... The experiments were performed to investigate the degradation of microcystins in order to assess the effectiveness and feasibility of UV/H2O2 system for the disinfection of water polluted by microcystins. The influence factors such as H2O2, pH and UV light intensities were investigated respectively. Degradation of microcystin-RR （MC-RR） could be fitted by either the pseudo-first-order or second-order rate equations. This homogenous system could significantly enhance the degradation rate due to the synergetic effect between UV and H2O2. The degradation mainly followed the mechanism of direct photolysis and .OH oxidation reactions. Experimental results showed that 94.83% of MC-RR was removed under optimal experimental conditions and the UV/H2O2 system provided an alternative to promote the removal of microcystins in drinking water supplies. 展开更多
关键词 Microcystin-RR degradation kinetics UV/H2O2 photo-oxidation
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Influence of coexisting substances on the photodegradation behaviors of 17α-ethinylestradiol (EE_2) in the UV/H_2O_2 process 认领 引用 被引量：1
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作者 张照韩 冯玉杰 +2 位作者 王鲁 刘雨 任南琪 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2011年第5期31-36,共6页
The batch photodegradation reactor was used to investigate the influence of the common coexisting substances in wastewater,such as H+,anions (HCO3-,Cl-and NO3-) and organic compounds (methanol and bisphenol A),on the ... The batch photodegradation reactor was used to investigate the influence of the common coexisting substances in wastewater,such as H+,anions (HCO3-,Cl-and NO3-) and organic compounds (methanol and bisphenol A),on the photodegradation behaviors of EE2 in the UV/H2O2 process.The results indicated that the addition of coexisting substances can influence the photodegradation behaviors of EE2 and it also follows the first-order kinetics.The acidic (pH 2-4) and alkaline (pH 10-12) medium benefit the photodegradation of EE2,but the photodegradation rate constant of EE2 keeps almost constant in the pH value of 4-10.The addition of anions,such as HCO3-,Cl-and NO3-,can inhibit the photodegradation of EE2,and the rate constant has a negative linear relationship with the concentration of the anions.However,the reduction degrees vary with the anions kinds,and the inhibition effect of the three anions is in the order of HCO3->NO3->Cl-.Addition of 5 mg/L methanol and bisphenol A can reduce the photodegradation rate constant of EE2by 84.31% and 72%,respectively.By comparison,the retardant effect of methanol is much more evident.In the studied concentrations range,the photodegradation rate constant of EE2 is the unary quadratic function of the organic compounds concentrations. 展开更多
关键词 EE2 Anions Coexisting organic compounds UV/H2O2 process Photodegradation rate constant
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UV/TiO_2/H_2O_2法对高浓度有机废水降解的应用研究 认领 引用 被引量：9
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作者 张冬梅 《环境工程》 CAS 北大核心 2003年第4期23-24,共2页
用UV TiO2 H2 O2 法对高浓度有机废水降解的实验表明 ,当TiO2 、H2 O2 的投加量分别为 2 0g与 1% ,反应时间为3h时 ,CODCr、Oil、Ar OH、NH3 N、S2 - 的平均去除率分别达到 73 %、83 %、86%、5 0 %、10 0 %。此处理工艺具有除臭、除色... 用UV TiO2 H2 O2 法对高浓度有机废水降解的实验表明 ,当TiO2 、H2 O2 的投加量分别为 2 0g与 1% ,反应时间为3h时 ,CODCr、Oil、Ar OH、NH3 N、S2 - 的平均去除率分别达到 73 %、83 %、86%、5 0 %、10 0 %。此处理工艺具有除臭、除色、快速高效、不产生污泥等优势。实验过程探索了TiO2 、H2 O2 的用量对各污染物降解率的影响 。 展开更多
关键词 UV/TiO2/H2O2法 有机废水 降解 废水处理 反应塔 炼油废水 光催化剂
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Formaldehyde degradation by UV/TiO_2/O_3 process using continuous flow mode 认领 引用 被引量：12
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作者 QI Hong SUN De-zhi CHI Guo-qing 《Journal of Environmental Sciences》 SCIE EI CAS 2007年第9期1136-1140,共5页
The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode. The effects of humidity, initial formaldehyde concentration, residence time and ozone adding amount... The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode. The effects of humidity, initial formaldehyde concentration, residence time and ozone adding amount on degradation of formaldehyde gas were investigated. The experimental results indicated that the combination of ozonation with photocatalytic oxidation on the degradation of formaldehyde showed a synergetic action, e.g,, it could considerably increase decomposing of formaldehyde. The degradation efficiency of formaldehyde was between 73.6% and 79.4% while the initial concentration in the range of 1.84--24 mg/m^3 by O3/TiO2flJV process. The optimal humidity was about 50% in UV/TiO2/O3 processs and degradation of formaldehyde increases from 39.0% to 94.1% when the ozone content increased from 0 to 141 mg/m^3. Furthermore, the kinetics of formaldehyde degradation reaction could be described by Langmuir-Hinshelwood model. The rate constant k of 46.72 mg/（m^3.min） and Langmuir adsorption coefficient K of 0.0268 m^3/mg were obtained. 展开更多
关键词 UV/TiO2/O3 process formaldehyde continuous flow mode
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3种染料化合物在UV-TiO_2/H_2O_2和UV-TiO_2体系中的光催化降解研究 认领 引用 被引量：5
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作者 涂代惠 李萍 史长林 《环境污染治理技术与设备》 2004年第7期30-34,共5页
采用自制的TiO2 膜和平板式固定床型光催化氧化反应装置 ,对甲基橙、茜素红和罗丹明B 3种含有不同生色基团的染料化合物进行了TiO2 光催化氧化降解研究 ,通过对照测定降解过程中吸光度、电导率、pH的变化 ,分析了在加入和不加入H2 O2 2... 采用自制的TiO2 膜和平板式固定床型光催化氧化反应装置 ,对甲基橙、茜素红和罗丹明B 3种含有不同生色基团的染料化合物进行了TiO2 光催化氧化降解研究 ,通过对照测定降解过程中吸光度、电导率、pH的变化 ,分析了在加入和不加入H2 O2 2种情况下降解过程的异同 ,比较了 3种染料化合物脱色的难易程度 。 展开更多
关键词 染料 UV-TiO2 H2O2 光催化降解工艺 固定床 光催化氧化反应 电导率
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Study on the Photocatalytic Degradation of Microcystins with UV/Fenton/TiO2 认领 引用 被引量：5
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作者 张维 董泽琴 +1 位作者 张琳 杨再荣 《Meteorological and Environmental Research》 2010年第1期30-33,38,共4页
[Objective] The paper aimed to study on the effects of photocatalytic degradation of microcystins MC-RR and MC-LR by UV/Fenton/TiO2 in depth lake water.[Method] With Fenton-TiO2 as photocatalyst,the influences of diff... [Objective] The paper aimed to study on the effects of photocatalytic degradation of microcystins MC-RR and MC-LR by UV/Fenton/TiO2 in depth lake water.[Method] With Fenton-TiO2 as photocatalyst,the influences of different reaction time,initial pH value,H2O2 concentration,Fe2+ concentration,TiO2 dosage,light intensity,initial concentration of microcystin on UV/Fenton/TiO2 heterogeneous photocatalytic degradation of microcystin were investigated,and removal effects of microcystin between heterogeneous photocatalytic degradation and UV photolysis were compared at the same time.[Result] Under the conditions that the initial concentration of H2O2 was 0.1 mmol/L,[H2O2]/[FeSO4] was 15:1,pH value was 4.0,the distance between the reaction solution and UV lamp tube was 1 cm,TiO2 dosage was 0.05 g/L,reaction temperature was (16±2) ℃,the removal rate of MC-RR with concentration of 0.35 mg/L and MC-LR with concentration of 0.29 mg/L could reach 91.5% and 90.2% after 3 minutes reacting.[Conclusion] UV/Fenton/TiO2 photocatalytic oxidation was proved to be effective in degradating microcystins. 展开更多
关键词 UV/Fenton/TiO2 Photocatalytic degradation Microcystins China
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Photodegradation of nitroaromatic compounds in aqueous solutions in the UV/H_2O_2 process 认领 引用 被引量：1
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作者 GOH Ngoh Khang 《Journal of Environmental Sciences》 SCIE EI CAS 2005年第6期886-893,共8页
Photodegradation of nitrobenzene and nitrophenols in aqueous solutions by means of UV/H2 O2 process was studied in the Rayox batch reactors. Three nitrophenol isomers were identified as main photoproducts in the irrad... Photodegradation of nitrobenzene and nitrophenols in aqueous solutions by means of UV/H2 O2 process was studied in the Rayox batch reactors. Three nitrophenol isomers were identified as main photoproducts in the irradiated NB aqueous solutions. The distribution of nitrophenol isomers follows the order p-〉 m-〉 o-nitrophenol. Other intermediates detected include nitrohydroquinone, nitrocatechol, catechol, benzoquinone, phenol, nitrateitrite ions, formic acid, glyoxylic acid, maleic acid, oxalic acid and some aliphatic ketones and aldehydes. The degradation of nitrobenzene and nitrophenols at initial stages follows the first-order kinetics and the decay rate constants for nitrobenzene（NB） are around l0^-3-10^-2 s^-1 and for nitrophenols are around 10^-2 s^-1. The decomposition of H2 O2 in the presence of NB and each nitrophenol isomers follows zero-order kinetics. The quantum yields at initial stages for NB decay were estimated around 0.30 to 0.36, and for NPs decay is around 0.31-0.54. 展开更多
关键词 photodegradation nitrobenzene nitrophenols UV/H2 O2 process
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UV-vis辐照下H_2Fe_2Ti_3O10/TiO_2插层材料光催化活性的研究(英文) 认领 引用
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作者 黄昀昉 吴季怀 +3 位作者 李涛海 林建明 黄妙良 魏月琳 《人工晶体学报》 EI CAS 北大核心 2007年第5期978-984,共7页
在高压汞灯辐照下,通过插入反应将H2Fe2Ti3O10与n-C3H7NH2/C2H5OH和TiO2溶胶制备出H2Fe2Ti3O10/TiO2插层复合物。插入TiO2的层状钙钛矿化合物H2Fe2Ti3O10在UV-vis辐照下表现出高活性。实验结果表明H2Fe2Ti3O10/TiO2作为光催化剂在可见光... 在高压汞灯辐照下,通过插入反应将H2Fe2Ti3O10与n-C3H7NH2/C2H5OH和TiO2溶胶制备出H2Fe2Ti3O10/TiO2插层复合物。插入TiO2的层状钙钛矿化合物H2Fe2Ti3O10在UV-vis辐照下表现出高活性。实验结果表明H2Fe2Ti3O10/TiO2作为光催化剂在可见光(λ>420nm)下辐照24h,降解甲基橙的速率为59.0%。与相同条件下降解率只有24%的商用光催化剂TiO2(Degussa P-25)相比,H2Fe2Ti3O10/TiO2表现出了更高的光催化活性。 展开更多
关键词 光催化活性 插层材料 H2Fe2Ti3O10 TiO2
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Comparison of degradation reactions of Acid Yellow 61 in both oxidation processes of H_2O_2/UV and O_3 认领 引用
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作者 WANG Yi zhong 1, A.Yedeler 2, A. Kettrup 2(1 Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China 2 GSF Institute of Ecological Chemistry, Neuherberg, Postfach 1129, 85758 Neuherberg, Germany) 《Journal of Environmental Sciences》 SCIE EI CAS 2001年第3期304-310,共7页
The comparison of degradation of Acid Yellow 61 as a model dye compound in both oxidation processes of H 2O 2/UV and O 3 has been studied. When the decolorization rate of Acid Yellow 61 in both reactions presented sim... The comparison of degradation of Acid Yellow 61 as a model dye compound in both oxidation processes of H 2O 2/UV and O 3 has been studied. When the decolorization rate of Acid Yellow 61 in both reactions presented similar, it was found there are some differences from the results of AOX removal and production of inorganic ions and organic acids. The results reveal that the H 2O 2/UV has beneficial effect on mineralization than O 3 only for degradation of Acid Yellow 61 solution and it is possible for enhancement of method efficiency by taking longer reaction time and addition of high concentration of oxidants. 展开更多
关键词 oxidation process H 2O 2/UV O 3 dye compound
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Photodegradation of Reactive Dyes by UV/Ferrioxalate/H2O2 System 认领 引用
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作者 王滨松 HUANG Junli Zhang Jie 《High Technology Letters》 EI CAS 2004年第4期75-78,共4页
Three types of simulated commercial reactive dye wastewater, separately prepared with FN-2BL red, C-R blue and C-2R yellow, were oxidized with UV/ferrioxalate/H2O2 system, especially by the introduction of Fe2+ ion. T... Three types of simulated commercial reactive dye wastewater, separately prepared with FN-2BL red, C-R blue and C-2R yellow, were oxidized with UV/ferrioxalate/H2O2 system, especially by the introduction of Fe2+ ion. The experimental results show that the optimized experimental conditions are pH=3.5, [Fe2+]=1mM, H2O2782mg/L for FN-2BL red and C-R blue and H2O2646mg/L for C-2R yellow, t=4h and T=80℃ when the concentration of dye is 400mg/L. Under such conditions, the observed COD and color removal efficiencies are above 94% and 99%, respectively for all the cases. This investigation has provided fundamental information for the treatment of wastewater containing reactive dyes using UV/ferrioxalate/H2O2. 展开更多
关键词 光降解反应 紫外线 草酸铁 H2O2 双氧水 废水处理工艺 染料行业 化学需氧量
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Degradation of micropolluants in flow-through VUV/UV/H2O2 reactors:Effects of H2O2 dosage and reactor internal diameter 认领 引用 被引量：5
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作者 Lumeng Zhan Wentao Li +4 位作者 Li Liu Tao Han Mengkai Li Zhimin Qiang 无 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第12期28-37,共10页
The degradation of atrazine(ATZ),sulfamethoxazole(SMX)and metoprolol(MET)in flowthrough VUV/UV/H2O2reactors was investigated with a focus on the effects of H2O2dosage and reactor internal diameter(ID).Results showed t... The degradation of atrazine(ATZ),sulfamethoxazole(SMX)and metoprolol(MET)in flowthrough VUV/UV/H2O2reactors was investigated with a focus on the effects of H2O2dosage and reactor internal diameter(ID).Results showed that the micropollutants were degraded efficiently in the flow-through VUV/UV/H2O2reactors following the pseudo first-order kinetics(R2>0.92).However,the steady-state assumption(SSA)kinetic model being vital in batch reactors was found invalid in flow-through reactors where fluid mixing was less sufficient.With the increase of H2O2dosage,the ATZ removal efficiency remained almost constant while the SMX and MET removal was enhanced to different extents,which could be explained by the different reactivities of the pollutants towards HO·.A larger reactor ID resulted in lower degradation rate constants for all the three pollutants on account of the lower average fluence rate,but the change in energy efficiency was much more complicated.In reality,the electrical energy per order(EEO)of the investigated VUV/UV/H2O2treatments ranged between 0.14–0.20,0.07–0.14 and 0.09–0.26 k Wh/m3/order for ATZ,SMX and MET,respectively,with the lowest EEOfor each pollutant obtained under varied H2O2dosages and reactor IDs.This study has demonstrated the efficiency of VUV/UV/H2O2process for micropollutant removal and the inadequacy of the SSA model in flow-through reactors,and elaborated the influential mechanisms of H2O2dosage and reactor ID on the reactor performances. 展开更多
关键词 VUV/UV/H2O2 Flow-through reactor Degradation H2O2 dosage Reactor internal diameter
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UV/H2O2 oxidation of tri(2-chloroethyl) phosphate: Intermediate products, degradation pathway and toxicity evaluation 认领 引用 被引量：6
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作者 Qiuyi Ji Huan He +6 位作者 Zhanqi Gao Xiaohan Wang Shaogui Yang Cheng Sun Shiyin Li Yong Wang Limin Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2020年第12期55-61,共7页
Tri(2-chloroethyl) phosphate(TCEP) with the initial concentration of 5 mg/L was degraded by UV/H2O2 oxidation process. The removal rate of TCEP in the UV/H2O2 system was 89.1% with the production of Cl-and PO4^3- of 0... Tri(2-chloroethyl) phosphate(TCEP) with the initial concentration of 5 mg/L was degraded by UV/H2O2 oxidation process. The removal rate of TCEP in the UV/H2O2 system was 89.1% with the production of Cl-and PO4^3- of 0.23 and 0.64 mg/L. The removal rate of total organic carbon of the reaction was 48.8% and the pH reached 3.3 after the reaction. The oxidative degradation process of TCEP in the UV/H2O2 system obeyed the first order kinetic reaction with the apparent rate constant of 0.0025 min^-1( R^2 = 0.9788). The intermediate products were isolated and identified by gas chromatography-mass spectrometer. The addition reaction of HO · and H2O and the oxidation reaction with H2O2 were found during the degradation pathway of 5 mg/L TCEP in the UV/H2O2 system. For the first time, environment risk was estimated via the "ecological structure activity relationships" program and acute and chronic toxicity changes of intermediate products were pointed out. The luminescence inhibition rate of photobacterium was used to evaluate the acute toxicity of intermediate products. The results showed that the toxicity of the intermediate products increased with the increase of reaction time, which may be due to the production of chlorine compounds. Some measures should be introduced to the UV/H2O2 system to remove the highly toxic Cl-containing compounds, such as a nanofiltration or reverse osmosis unit. 展开更多
关键词 Tri(2-chloroethyl)phosphate(TCEP) UV/H2O2 Mechanisms Toxicity evaluation
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UV/H_2O_2协同作用下TiO_2/CNT中空纤维膜水处理性能 认领 引用 被引量：3
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作者 于然 陈硕 范新飞 《大连理工大学学报》 CAS CSCD 北大核心 2019年第1期8-13,共6页
提出了一种H_2O_2协同光催化膜分离技术,通过向光催化膜分离过程中投加H_2O_2,在光催化、UV/H_2O_2过程和光芬顿过程的协同下拓宽活性物种产生路径,进而提高膜在水中的污染物降解能力.通过湿法纺丝-异相成核法制备了TiO_2/碳纳米管(CNT... 提出了一种H_2O_2协同光催化膜分离技术,通过向光催化膜分离过程中投加H_2O_2,在光催化、UV/H_2O_2过程和光芬顿过程的协同下拓宽活性物种产生路径,进而提高膜在水中的污染物降解能力.通过湿法纺丝-异相成核法制备了TiO_2/碳纳米管(CNT)中空纤维膜,该过程避免了TiO_2高温转晶的过程,且TiO_2和CNT的复合可以形成异质结结构,在一定程度上抑制TiO_2光生电子空穴对的再结合,有助于提高光催化效率.苯酚处理实验显示,H_2O_2协同TiO_2/CNT中空纤维膜过程可以在停留时间为1.5s时实现对苯酚的高效降解,去除率达59.2%.分离实验表明,运行120min后,H_2O_2协同光催化膜过程膜通量基本维持不变,分别是单独膜分离过程、光催化膜分离过程、H_2O_2协同膜分离过程的2.5、1.3、1.7倍. 展开更多
关键词 光催化分离膜 H2O2 UV 苯酚 水处理
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