芬顿-混凝反应对藻类胞外有机物去除机制研究  

Study on Mechanism of Removal of Extracellular Organic Matter from Algae by Fenton-coagulation Reaction

作　　者：林英姿[1] 任睿君 邹瑜斌 杨炼 柳乐怡 肖峰[2] LIN Yingzi;REN Ruijun;ZOU Yubin;YANG Lian;LIU Leyi;XIAO Feng(School of Municipal and Environmental Engineering Jilin Jianzhu University,Changchun 130118,China;Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences,Beying 100085,China;Research and Development Center for Beijing Drainage Group Ltd.,Beijing 100124,China;School of Electrical and Electronic Engineering North China Electric Power University,Beijing 102206,China)

机构地区：[1]吉林建筑大学市政与环境工程学院,吉林长春130118 [2]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085 [3]北京城市排水集团科技研发中心,北京100124 [4]华北电力大学(北京)电气与电子工程学院,北京102206

出　　处：《环境保护科学》2020年第1期69-75,96,共8页Environmental Protection Science

基　　金：国家自然科学基金(51778267;51578529);吉林省科技厅项目(20190201113JC);中央高校基本科研业务费专项基金资助(2019MS033)

摘　　要：文章探究不同反应条件下芬顿-混凝反应与铁盐(Fe2(SO4)3)混凝反应对铜绿微囊藻胞外有机物(EOM)的去除效果。结果表明,在室温,pH=3,Fe2+/H2O2摩尔比为1∶1时,EOM的去除率达到最佳。Fe2+投加量为5 mmol/L时,TOC、UV254去除率分别达到70%、34%。通过三维荧光(EEM)与分子量分布(HPSEC)分析表明,藻类EOM中主要成分是亲水性大分子多糖和蛋白质,其次是疏水性类腐殖酸物质。单独的铁盐混凝反应表明混凝过程促进了芬顿反应对EOM的去除,EOM中亲水性大分子量物质的去除率很大程度是由Fe2+氧化为Fe3+通过混凝过程贡献。此外,在芬顿反应处理EOM过程中不同时间点絮体粒径受Fe2+投加量影响较大,形成的絮体粒径越小,TOC去除率越高。This paper investigated the effect of Fenton-coagulation reaction and the iron salt(Fe2(SO4)3)coagulation reaction on the removal of extracellular organic matter(EOM)from Microcystis aeruginosa under different reaction conditions.The results showed that the removal rate of EOM was the best with room temperature and pH=3 as well as a 1:1 molar ratio of Fe2+/H2O2.The TOC and UV254 removal rates were 70%and 34%respectively with the Fe2+dosage of 5mmol/L.Three-dimensional fluorescence(EEM)and high-performance size-exclusion chromatography(HPSEC)analysis indicated that the main components of algae EOM were hydrophilic macromolecular polysaccharides and proteins,followed by hydrophobic humic acid-like substances.The individual iron salt coagulation indicated that the coagulation process enhanced the Fenton reaction to remove EOM.The removal rate of hydrophilic large molecular weight substances in EOM was greatly contributed by the oxidation of F&+to Fe3+through the coagulation process.In addition,the particle size of the floc was greatly affected by Fe2+dosage at different time in the EOM treatment process by Fenton reaction,the smaller particle size of the floc formed,the higher the removal rate of TOC.

关 键 词：胞外有机物 芬顿反应 混凝 絮体粒径 总有机碳 

分 类 号：X703.1[环境科学与工程—环境工程]