腐殖酸/Fe^(2+)/PMS体系降解DMP的研究  

Degradation of DMP in water with sulfate radicals by humic acid/Fe^(2+)/PMS system

作　　者：张敏 周思婕 王平 谢林蓓 李奥 ZHANG Min;ZHOU Si-jie;WANG Ping;XIE Lin-bei;LI Ao(College of Biology and the Environment,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]南京林业大学生物与环境学院,江苏南京210037

出　　处：《应用化工》2021年第2期363-366,371,共5页Applied Chemical Industry

基　　金：国家自然科学基金面上项目(31270680);江苏高校优势学科建设工程资助项目。

摘　　要：研究投加了腐殖酸(HA)的Fe2+/过一硫酸盐(PMS)体系对邻苯二甲酸二甲酯(DMP)的降解。考察了体系沉淀物、腐殖酸浓度对降解DMP的影响。通过活性自由基和中间产物的鉴定推测了DMP的降解过程。结果表明,腐殖酸/Fe^(2+)/PMS体系对DMP的降解明显优于其他体系,DMP的降解率可达100%。体系中生成的沉淀物是腐殖酸与铁的络合物,是促进DMP降解的重要物质。当腐殖酸浓度从1 mg/L增加至20 mg/L时,DMP的降解速率呈先增大后减小趋势。·OH和SO^(·-)_(4)是体系中主要的活性自由基。DMP降解的中间产物主要为邻苯二甲酸单甲酯、邻苯二甲酸和苯甲酸。The Fe 2+/peroxymonosulfate(PMS)system with humic acid was studied to degrade dimethyl phthalate(DMP).The effects of precipitate and humic acid concentration on the degradation of DMP were investigated.The degradation process of DMP was inferred by preliminary identification of active free radicals and intermediate products.Results showed that the degradation of DMP by humic acid/Fe^(2+)/PMS system was better than that by other systems,and the degradation rate can reach 100%.The precipitate produced in the system is the complex of humic acid and iron,and it is an important material to promote the degradation of DMP in the system.The degradation rate of DMP is proportional to the concentration of humic acid,when it is 1~10 mg/L.But the degradation of DMP will be inhibited when the concentration of humic acid is higher than 10 mg/L.·OH and SO^(·-)_(4)are the main active radicals in this system.The intermediate products of DMP degradation are monomethyl phthalate,phthalic acid and benzoic acid.

关 键 词：腐殖酸 邻苯二甲酸二甲酯 过一硫酸盐 高级氧化 

分 类 号：TQ09[化学工程] TQ118