光助电催化氧化降解水体中甲硝唑的实验研究  

Experimental Study on Degradation of Metronidazole in Water by Photoassisted Electrocatalytic Oxidation

作　　者：刘晨 梁吉艳[1] 孟静[1] 李恒洋 李春林 黄开拓 LIU Chen;LIANG Jiyan;MENG Jing;LI Hengyang;LI Chunglin;HUANG Kaituo(School of Science,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学理学院,辽宁沈阳110870

出　　处：《环境保护科学》2020年第5期93-98,共6页Environmental Protection Science

摘　　要：实验以甲硝唑为模型污染物,采用光助电催化氧化法对水体中的甲硝唑进行处理。通过单因素法分别探究了不同初始pH、甲硝唑初始浓度、电流密度、电解质浓度等因素对水体中甲硝唑处理效果的影响,并利用响应曲面法(Response Surface Methodology,RSM)对实验进行优化及分析。研究表明:在初始pH为3、甲硝唑初始浓度为25 mg/L、电流密度为20.7 mA/cm^2、电解质浓度为5.3 g/L、电极间距为35 mm,反应时间为30 min条件下,处理效果最佳,甲硝唑去除率可达到99.6%。光助电催化氧化法可以有效处理水体中的甲硝唑。This paper used the metronidazole as a model pollutant and the photoassisted electrocatalytic oxidation was selected to treated the metronidazole in water.The effects of different initial pH,initial concentrations of metronidazole,current density and electrolyte concentration on the treatment performances were investigated by the single factor method.The Response Surface Methodology(RSM)was used to optimize and analyze the experiment.The research showed that there was the best treatment result with the initial pH as 3,the initial concentration of metronidazole of 25 mg/L,the current density as 20.7 mA/cm^2,the electrolyte concentration as 5.3 g/L,the electrode distance as 35 mm and the reaction time as 30 min.The removal rate of metronidazole achieved 99.6%.Hence,the photoassisted electrocatalytic oxidation could effectively treat the metronidazole in water.

关 键 词：光助电催化氧化 甲硝唑 抗生素废水 氯自由基 羟基自由基 响应曲面法优化 

分 类 号：X703.1[环境科学与工程—环境工程]