Under visible light illumination,2,3-diaminophenazine(DAPN)was generated from the oxidation of o-phenylenediamine(OPDA)in Fe^3+/H2O2 solution.Hydroxyl radical(*OH)produced in this system was determined by directly mea...Under visible light illumination,2,3-diaminophenazine(DAPN)was generated from the oxidation of o-phenylenediamine(OPDA)in Fe^3+/H2O2 solution.Hydroxyl radical(*OH)produced in this system was determined by directly measuring the concentration of DAPN.In comparison with the traditional methods,the determination is more accurate and simple.展开更多
A novel plasmonic photo‐Fenton catalyst of Ag/AgCl/Fe‐S was synthesized by ion exchange and photoreduction methods.The obtained catalyst was characterized by X‐ray diffraction,X‐ray photoelectron spectroscopy,scan...A novel plasmonic photo‐Fenton catalyst of Ag/AgCl/Fe‐S was synthesized by ion exchange and photoreduction methods.The obtained catalyst was characterized by X‐ray diffraction,X‐ray photoelectron spectroscopy,scanning electron microscope imaging,and Brunauer‐Emmett‐Teller measurements.Moreover,the photocatalytic activity of Ag/AgCl/Fe‐S was investigated for its degradation activity towards bisphenol A(BPA)as target pollutant under visible light irradiation.The effects of H2O2concentration,pH value,illumination intensity,and catalyst dosage on BPA degradation were examined.Our results indicated that the Ag/AgCl material was successfully loaded onto Fe‐sepiolite and showed a high photocatalytic activity under illumination by visible light.Furthermore,active species capture experiments were performed to explore the photocatalytic mechanism of the Ag/AgCl/Fe‐S in this heterogeneous photo‐Fenton process,where the major active species included hydroxyl radicals(?OH)and holes(h+).展开更多
The existence and risk of emerging organic contaminants(EOCs)have been under consideration and paid much effort to degrade these pollutants.Fenton system is one of the most widely used technologies to solve this probl...The existence and risk of emerging organic contaminants(EOCs)have been under consideration and paid much effort to degrade these pollutants.Fenton system is one of the most widely used technologies to solve this problem.The original Fenton system relies on the hydroxyl radicals produced by Fe(Ⅱ)/H_(2)O_(2) to oxidize the organic contaminants.However,the application of the Fenton system is limited by its low iron cycling efficiency and the high risks of hydrogen peroxide transportation and storage.The introduction of external energy(including light and electricity etc.)can effectively promote the Fe(Ⅲ)/Fe(Ⅱ)cycle and the reduction of oxygen to produce hydrogen peroxide in situ.This review introduces three in-situ Fenton systems,which are electro-Fenton,Photo-Fenton,and chemical reaction.The mechanism,influencing factors,and catalysts of these three in-situ Fenton systems in degrading EOCs are discussed systematically.This review strengthens the understanding of Fenton and in-situ Fenton systems in degradation,offering further insight into the real application of the in-situ Fenton system in the removal of EOCs.展开更多
本文以辽河油田沈阳采油厂某采油作业区石油污染土壤为研究对象,探究H2O2浓度、FeSO4浓度、反应体系pH、水土比、反应时间等因素对石油污染土壤中石油烃降解效果的影响。研究结果表明,H2O2投加浓度对石油烃的降解效果影响显著,氧化剂和...本文以辽河油田沈阳采油厂某采油作业区石油污染土壤为研究对象,探究H2O2浓度、FeSO4浓度、反应体系pH、水土比、反应时间等因素对石油污染土壤中石油烃降解效果的影响。研究结果表明,H2O2投加浓度对石油烃的降解效果影响显著,氧化剂和催化剂浓度对Fenton反应过程中石油烃的氧化效果有较大影响,反应体系pH值为6.0时石油烃的去除效果最佳,合理的水土比能够提高氧化效率。不同程度污染土壤的修复效果表明,反应24 h后,Fenton反应基本完成,石油烃去除率分别为49.22%,55.31%和61.98%,该研究结果可为污染土壤环境修复提供科学依据。In this paper, the effects of H2O2 concentration, FeSO4 concentration, reaction system pH, water and soil ratio, and reaction time on the degradation of petroleum hydrocarbons in oil-polluted soil were studied in an oil production area of Shenyang oil production plant of Liaohe Oilfield. The research results show that the concentration of H2O2 has a significant impact on the degradation effect of petroleum hydrocarbons, and the concentration of oxidant and catalyst has a great impact on the oxidation effect of petroleum hydrocarbons in the Fenton reaction process. When the pH value of the reaction system is 6.0, the removal effect of petroleum hydrocarbons is the best, and reasonable water and soil ratio can improve the oxidation efficiency. The remediation effects of contaminated soil of different degrees show that after 24 h of reaction, Fenton reaction is basically completed, and the removal rates of petroleum hydrocarbons are 49.22%, 55.31% and 61.98%, respectively. The research results can provide scientific basis for the remediation of contaminated soil environment.展开更多
基金supported by the National Basic Research Program of China(No.2008CB417206)the National Natural Science Foundation of China(No.20877048)
文摘Under visible light illumination,2,3-diaminophenazine(DAPN)was generated from the oxidation of o-phenylenediamine(OPDA)in Fe^3+/H2O2 solution.Hydroxyl radical(*OH)produced in this system was determined by directly measuring the concentration of DAPN.In comparison with the traditional methods,the determination is more accurate and simple.
基金supported by the National Natural Science Foundation of China(41573118)Research Foundation of Education Bureau of Hunan Province,China(14B177)Special Project of Xiangtan University~~
文摘A novel plasmonic photo‐Fenton catalyst of Ag/AgCl/Fe‐S was synthesized by ion exchange and photoreduction methods.The obtained catalyst was characterized by X‐ray diffraction,X‐ray photoelectron spectroscopy,scanning electron microscope imaging,and Brunauer‐Emmett‐Teller measurements.Moreover,the photocatalytic activity of Ag/AgCl/Fe‐S was investigated for its degradation activity towards bisphenol A(BPA)as target pollutant under visible light irradiation.The effects of H2O2concentration,pH value,illumination intensity,and catalyst dosage on BPA degradation were examined.Our results indicated that the Ag/AgCl material was successfully loaded onto Fe‐sepiolite and showed a high photocatalytic activity under illumination by visible light.Furthermore,active species capture experiments were performed to explore the photocatalytic mechanism of the Ag/AgCl/Fe‐S in this heterogeneous photo‐Fenton process,where the major active species included hydroxyl radicals(?OH)and holes(h+).
基金supported by the National Natural Science Foundation of China(No.21906056No.22176060)+2 种基金the Undergraduate Training Program on Innovation and Entrepreneurship(S202110251087)the Science and Technology Commission of Shanghai Municipality(22ZR1418600)Shanghai Municipal Science and Technology(No.20DZ2250400).
文摘The existence and risk of emerging organic contaminants(EOCs)have been under consideration and paid much effort to degrade these pollutants.Fenton system is one of the most widely used technologies to solve this problem.The original Fenton system relies on the hydroxyl radicals produced by Fe(Ⅱ)/H_(2)O_(2) to oxidize the organic contaminants.However,the application of the Fenton system is limited by its low iron cycling efficiency and the high risks of hydrogen peroxide transportation and storage.The introduction of external energy(including light and electricity etc.)can effectively promote the Fe(Ⅲ)/Fe(Ⅱ)cycle and the reduction of oxygen to produce hydrogen peroxide in situ.This review introduces three in-situ Fenton systems,which are electro-Fenton,Photo-Fenton,and chemical reaction.The mechanism,influencing factors,and catalysts of these three in-situ Fenton systems in degrading EOCs are discussed systematically.This review strengthens the understanding of Fenton and in-situ Fenton systems in degradation,offering further insight into the real application of the in-situ Fenton system in the removal of EOCs.
文摘本文以辽河油田沈阳采油厂某采油作业区石油污染土壤为研究对象,探究H2O2浓度、FeSO4浓度、反应体系pH、水土比、反应时间等因素对石油污染土壤中石油烃降解效果的影响。研究结果表明,H2O2投加浓度对石油烃的降解效果影响显著,氧化剂和催化剂浓度对Fenton反应过程中石油烃的氧化效果有较大影响,反应体系pH值为6.0时石油烃的去除效果最佳,合理的水土比能够提高氧化效率。不同程度污染土壤的修复效果表明,反应24 h后,Fenton反应基本完成,石油烃去除率分别为49.22%,55.31%和61.98%,该研究结果可为污染土壤环境修复提供科学依据。In this paper, the effects of H2O2 concentration, FeSO4 concentration, reaction system pH, water and soil ratio, and reaction time on the degradation of petroleum hydrocarbons in oil-polluted soil were studied in an oil production area of Shenyang oil production plant of Liaohe Oilfield. The research results show that the concentration of H2O2 has a significant impact on the degradation effect of petroleum hydrocarbons, and the concentration of oxidant and catalyst has a great impact on the oxidation effect of petroleum hydrocarbons in the Fenton reaction process. When the pH value of the reaction system is 6.0, the removal effect of petroleum hydrocarbons is the best, and reasonable water and soil ratio can improve the oxidation efficiency. The remediation effects of contaminated soil of different degrees show that after 24 h of reaction, Fenton reaction is basically completed, and the removal rates of petroleum hydrocarbons are 49.22%, 55.31% and 61.98%, respectively. The research results can provide scientific basis for the remediation of contaminated soil environment.
