Fenton法降解吡虫啉与纯Fenton反应过程的对比研究  

Comparative Study of the Fenton Process with Imidacloprid and Pure Water

作　　者：赖发英[1,2] 廖昕鹏 王国锋 潘丽 余文薇 何晋保 LAI Faying;LIAO Xinpeng;WANG Guofeng;PAN Li;YU Wenwei;HE Jinbao(School of Land Resource and Environment,Jiangxi Agricultural University,Nanchang,330045 China;Key Laboratory of Poyang Lake Watershed Agricultural Resource and Ecology of Jiangxi Province,Nanchang,330045 China;Jiangxi Academy of Eco-Environmental Sciences and Planning,Nanchang,330039 China)

机构地区：[1]江西农业大学国土资源与环境学院,江西南昌330045 [2]江西省鄱阳湖流域农业资源与生态重点实验室,江西南昌330045 [3]江西省生态环境科学研究与规划院,江西南昌330039

出　　处：《水处理技术》2022年第10期43-47,共5页Technology of Water Treatment

基　　金：江西省教育厅科学技术研究青年基金项目(GJJ190229);江西省自然科学基金青年基金项目(20202BABL213024)。

摘　　要：考察了反应条件对Fenton法降解吡虫啉的影响,并对分别发生在纯水和吡虫啉溶液的两种Fenton体系进行了过程参数研究。结果表明,在初始pH为3、H_(2)O_(2)用量为4.9 mmol/L、Fe^(2+)用量为2.24 mmol/L、温度为20℃、反应时间为2 h时,Fenton对100 mg/L吡虫啉的去除率可接近70%。在初始pH为3、5时,两体系pH都随反应的进行而逐渐降低,且吡虫啉Fenton体系的pH相对降低更多。相比于纯水Fenton体系,吡虫啉Fenton体系在反应过程中含有更高的Fe^(2+)浓度和Fe^(2+)/Fe^(3+)比值,可能是因为吡虫啉降解的中间产物将部分Fe^(3+)还原成了Fe^(2+)。ORP可以有效地反映Fenton反应的进程。The effects of reaction conditions on the degradation of imidacloprid by Fenton were investigated,and the changes of reaction parameters in pure water or imidacloprid solution during the reaction process were studied.The results showed that the removal rate of imidacloprid in the wastewater containing 100 mg/L imidacloprid was close to 70%after 2 h of reaction,when the initial pH was 3,the amount of H_(2)O_(2)was 4.9 mmol/L,the amount of Fe^(2+)was 2.24 mmol/L and the reaction temperature was 20℃.When the initial pH was 3 or 5,the pH values of both systems decreased gradually with the reaction.However,the pH value of the imidacloprid system was lower.compared with the pure water Fenton system,the imidacloprid system had more Fe^(2+)and higher Fe^(2+)/Fe^(3+)ratio during the reaction process,possibly due to the partial reduction of Fe^(3+)to Fe^(2+)caused by the intermediate products of imidacloprid degradation.ORP value could effectively reflect the process of Fenton reaction.

关 键 词：FENTON法 高级氧化 吡虫啉 铁离子 

分 类 号：X703.1[环境科学与工程—环境工程]