Enhanced degradation of organic contaminants by Fe(Ⅲ)/peroxymonosulfate process with L-cysteine

作     者：Chengdu Qi Yanni Wen Yijie Zhao Yinhao Dai Yanping Li Chenmin Xu Shaogui Yang Huan He Chengdu Qi;Yanni Wen;Yijie Zhao;Yinhao Dai;Yanping Li;Chenmin Xu;Shaogui Yang;Huan He

作者机构：School of EnvironmentNanjing Normal UniversityNanjing 210023China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2022年第33卷第4期

页      面：2125-2128页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the Natural Science Foundation of Jiangsu Province,China (No. BK20200721) the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province,China (No. 19KJB610016) the National Natural Science Foundation of China (No. 21777067) the Six Talent Peaks Project in Jiangsu Province,China (No. JNHB–10) Primary Research&Development Plan of Jiangsu Province,China (No. BE2019743) 

主　　题：Advanced oxidation process Peroxymonosulfate Fe(II)recycle L-cysteine Reactive species Degradation pathway 

摘      要：The difficulty in Fe(Ⅲ)/Fe(Ⅱ) conversion in the Fe(Ⅲ)/peroxymonosulfate(PMS) process limits its efficiency and ***,L-cysteine(Cys),a green natural organic ligand with reducing capability,was innovatively introduced into Fe(Ⅲ)/PMS to construct an excellent Cys/Fe(Ⅲ)/PMS *** Cys/Fe(Ⅲ)/PMS process,at room temperature,can degrade a variety of organic contaminants,including dyes,phenolic compounds,and *** subsequent experiments with acid orange 7(A07),the AO7 degradation efficiency followed pseudo-first-order kinetic which exhibited an initial fast stage and a second slow stage.The rate constant values ranged depending on the initial Cys,Fe(Ⅲ),PMS,and AO7 concentrations,reaction temperature,and pH *** addition,the presence of Cl^(-),NO_(3)^(-),and SO_(4)^(2-) had negligible impact while HCO_(3)^(-) and humic acid inhibited the degradation of ***,radical scavenger experiments and methyl phenyl sulfoxide(PMSO) transformation assay indicated that sulfate radical,hydroxyl radical,and ferryl ion(Fe(Ⅳ)) were the dominant reactive species involved in the Cys/Fe(Ⅲ)/PMS ***,based on the results of gas chromatography-mass spectrometry,several AO7 degradation pathways,including N=N cleavage,hydroxylation,and ring opening were *** study provided a new insight to improve the efficiency of Fe(Ⅲ)/PMS process by accelerating Fe(Ⅲ)/Fe(Ⅱ)cycle with Cys.