日光/氯氧化体系降解阿特拉津的效能及机理研究  

Degradation of atrazine by simulated solar and chlorine oxidation processes:Efficiency and mechanism

作　　者：于凡 谭凤训[1] 罗从伟[1,2] 武道吉[1,2] 陈永凯 李明安 YU Fan;TAN Fengxun;LUO Congwei;WU Daoji;CHEN Yongkai;LI Ming’an(School of Municipal and Environmental Engineering,Shandong Jianzhu University,Ji’nan 250101,China;Institute of Resources and Environment Innovation,Shandong Jianzhu University,Ji’nan 250101,China)

机构地区：[1]山东建筑大学市政与环境工程学院,山东济南250101 [2]山东建筑大学资源与环境创新研究院,山东济南250101

出　　处：《工业水处理》2023年第5期77-84,共8页Industrial Water Treatment

基　　金：国家自然科学基金项目(51908335);中国博士后科学基金项目(2020M672085);山东省博士后创新项目(202002023);山东省重大研发计划项目(2020CXGC011203)。

摘　　要：以日光/氯作为研究体系,考察了其对典型除草剂阿特拉津(ATZ)的降解效能。研究了初始氧化剂NaClO浓度、pH、阴离子浓度(CO_(3)^(2-)/HCO_(3)^(-)和Cl^(-))、天然有机物(NOM)对ATZ降解的影响。结果表明,在酸性条件下ATZ的降解受到促进作用,这是由于体系中产生的活性成分(O_(3)、HO·、RCS)会加快体系反应的进行;而在碱性条件下ATZ的降解受到明显抑制作用,阴离子和天然有机物的存在均会抑制ATZ的去除,这主要是由于其与ATZ竞争自由基反应造成的。测定了8种氧化产物,推测ATZ的降解路径主要是通过电子转移反应、夺氢反应和加成反应这3种途径降解。急性毒性实验表明ATZ在降解过程中毒性减小。The degradation efficiency of typical herbicide Atrazine(ATZ)was investigated using solar/chlorine as the research system.The effects of initial oxidizing agent NaClO concentration,pH,anion concentration(CO32−/HCO3−and Cl−)and natural organic matter NOM on ATZ degradation were investigated.The results showed that the degradation of ATZ was promoted under acidic conditions,because the active components(O3,HO·,RCS)produced in the system would accelerate the reaction,while the degradation of ATZ was significantly inhibited under alkaline conditions.The removal of ATZ was inhibited by the presence of anions and natural organic matter,which was mainly due to its competition with ATZ for free radical reactions.Eight kinds of oxidation products were determined,and the degradation paths of ATZ were speculated,mainly through electron transfer reaction,hydrogen capture reaction and addition reaction.The acute toxicity experiment showed that the toxicity of ATZ decreased during degradation.

关 键 词：日光/氯 阿特拉津 降解效能 氧化产物 毒性实验 

分 类 号：X703.1[环境科学与工程—环境工程]