UV/H_2O_2降解2,4,6-三氯苯甲醚动力学及产物研究  

Degradation of 2,4,6-trichloroanisole by UV/H_2O_2: kinetics and products

作　　者：罗从伟[1] 马军[1] 江进[1] 关朝婷 庞素艳[2] 刘洪君[1] 翟学东[3] 武道吉[4] LUO Cong-wei;MA Jun;JIANG Jin;GUAN Chao-ting;PANG Su-yan;LIU Hong-jun;ZHAI Xue-dong;WU Dao-ji(State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China;School of science and industrial technology, Harbin Institute of Technology, Harbin 150090, China;School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250010, China)

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]哈尔滨理工大学绿色化工技术重点实验室,黑龙江哈尔滨150090 [3]哈尔滨工业大学科学与工业技术研究院,黑龙江哈尔滨150090 [4]山东建筑大学市政与环境工程学院,山东济南250000

出　　处：《中国环境科学》2017年第5期1831-1837,共7页China Environmental Science

基　　金：国家自然科学基金资助项目(51378141/51578203);黑龙江省自然科学基金资助项目(QC2014CO55);城市水资源与水环境国家重点实验室开放基金资助项目(HIT;2016DX13)

摘　　要：对UV/H_2O_2降解水体中2,4,6-三氯苯甲醚(TCA)的效能进行了系统研究,并且对其氧化产物进行测定.考察了自然水体中存在的天然有机物、碳酸根、氯离子以及TCA初始浓度和H_2O_2投加量对TCA去除效率的影响.结果表明HO?能够有效的降解TCA,HO?与TCA的二级反应速率常数为5.1×109L/(mol×s).H_2O_2投加量的增加能够有效促进TCA的降解,TCA初始浓度(0.5~200nmol/L)和氯离子浓度(0.5~10mmol/L)的增加对TCA降解效率影响不大,而水体中NOM和碳酸根的存在却能够显著抑制TCA的降解.HO?氧化TCA的主要产物是2,4,6-三氯苯酚、2,6-二氯-1,4苯醌和2种开环产物,据此推测TCA在UV/H_2O_2体系中的降解路径.The degradation of2,4,6-trichloroanisole(TCA)in UV/H2O2process was investigated in the present study.Effects of water matrix(i.e.,natural organic matter(NOM),carbonate/bicarbonate(HCO3-/CO32-),chloride ions(Cl-)),TCA concentration,and H2O2dosage were evaluated.The second order rate constant of TCA react with HO?was determined to be5.1×109L/(mol?s).The degradation efficiency of TCA was increased with increasing H2O2dosage.The increase of TCA initial concentration(0.5~200nmol/L)and Cl-concentration(0.5~10mmol/L)had slight negative effects on TCA degradation.The removal of TCA was significantly inhibited in the presence of NOM or HCO3-/CO32-.Further,the main degradation products,including2,4,6-trichlorophenol,2,6-dichloro-1,4-benzoquinone and two aromatic ring-opening products,were detected in the reaction of TCA with HO?,and thus a tentative pathway was proposed.

关 键 词：2 4 6-三氯苯甲醚 羟基自由基 氧化产物 降解路径 

分 类 号：X52[环境科学与工程—环境工程] X131.2