Complexation of iron by salicylic acid and its effect on atrazine photodegradation in aqueous solution

作     者：Xiaoxia OU Chong WANG Fengjie ZHANG Xie QUAN Yan MA He LIU 

作者机构：College of Life ScienceDalian Nationalities UniversityDalian 116600China Key Laboratory of Industrial Ecology and Environmental EngineeringMinistry of EducationDalian University of TechnologyDalian 116024China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2010年第4卷第2期

页      面：157-163页

核心收录：

学科分类：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] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(Grant No.20907006) Doctor Initial Fund of Dalian Nationalities University,China(No.20096105) 

主　　题：salicylic acid iron atrazine photodegradation 

摘      要：The photodegradation of atrazine and the photochemical formation of Fe(Ⅱ)and H_(2)O_(2)in aqueous solutions containing salicylic acid and Fe(Ⅲ)were studied under simulated sunlight *** photolysis followed first-order reaction kinetics,and the rate constant(k)corresponding to the solution of Fe(Ⅲ)-salicylic acid complex(Fe(Ⅲ)-SA)was only 0.0153 h^(–1),roughly one eighth of the k observed in the Fe(Ⅲ)alone solution(0.115 h^(–1)).Compared with Fe(Ⅲ)solution,the presence of salicylic acid significantly enhanced the formation of Fe(Ⅱ)but greatly decreased H_(2)O_(2)generation,and their subsequent product,hydroxyl radical(%OH),was much less,accounting for the low rate of atrazine photodegradation in Fe(Ⅲ)-SA *** interaction of Fe(Ⅲ)with salicylic acid was analyzed using Fourier-transform infrared(FTIR)spectroscopy and UV-visible absorption,indicating that Fe(Ⅲ)-salicylic acid complex could be formed by ligand exchange between the hydrogen ions in salicylic acid and Fe(Ⅲ)ions.