Cu2+在混凝中对富里酸氯化消毒副产物的影响  

Effect of Cu2+ on the formation potential of chlorinated by-products of fulvic acid in coagulation

作　　者：刘伟楠 李征[2] 刘立超 李静 LIU Wei-nan;LI Zheng;LIU Li-chao;LI Jing(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300400,China;The First Design and Research Institute of North China Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300074,China)

机构地区：[1]河北工业大学土木与交通学院,天津300400 [2]中国市政工程华北设计研究总院第一设计研究院,天津300074

出　　处：《中国环境科学》2020年第1期174-181,共8页China Environmental Science

基　　金：河北省住房和城乡建设厅科研项目(2014-230)

摘　　要：混凝实验采用硫酸铝作为混凝剂,以富里酸(FA)为目标物,考察Cu^2+对浊度、溶解性有机碳(DOC)去除效果和氯化消毒副产物生成势(DBPsFP)的影响,并采用三维荧光光谱(3DEEM)和超滤膜分级对混凝出水进行表征.结果表明,Cu^2+可以通过络合反应提高混凝过程对FA中亲水性组分和芳香结构DBPs前驱体的去除效果.在pH>7时,可以使二氯乙酸生成势(DCAAFP)和三氯甲烷生成势(TCMFP)明显降低.Cu^2+-混凝的作用更倾向于影响FA中分子量级分处于10~30kDa的物质,提高其对DOC和DBPs生成势的去除效果.In the experiment,aluminum sulfate was used as coagulant and Cu^2+ was added during the coagulation of fulvic acid(FA)to test its influence on turbidity,dissolved organic carbon(DOC)removal efficiency and the chlorination disinfection by-products formation potential(DBPsFP)of it.Three dimensional fluorescence spectroscopy(3DEEM)and ultrafiltration membrane classification were used to characterize the outlet.It was shown that Cu^2+ could improve the removal of hydrophilic component and aromatic structure by complexation reaction during coagulation.The formation potential of dichloroacetic acid(DCAAFP)and trichloromethane(TCMFP)could be significantly reduced when pH was higher than 7.The results showed that Cu^2+- coagulation was more likely to affect the molecular weight fraction which was between 10~30kDa in FA,and improved the removal efficiency of DOC and DBPs formation potential.

关 键 词：混凝 富里酸 溶解性有机碳 氯化消毒副产物 

分 类 号：X131.2[环境科学与工程—环境科学]