混凝对不同腐殖质生成氯代消毒副产物的影响  

Effect of coagulation on formation of chlorinated disinfection by-products in different humic substances

作　　者：唐楠[1] 王小(亻毛)[1] 杨宏伟[1] 解跃峰[1,2] 

机构地区：[1]清华大学环境学院,北京100084 [2]美国宾州州立大学州府学院环境系,宾州17057

出　　处：《给水排水》2016年第7期24-28,共5页Water & Wastewater Engineering

基　　金：国家自然科学基金重大项目(51290284)

摘　　要：用腐殖酸1、腐殖酸2及国产富里酸三种腐殖质进行配水试验,研究了混凝对消毒副产物前体物的去除。结果表明：当聚氯化铝投加量为0-12mg/L时,混凝对腐殖酸1、腐殖酸2及国产富里酸的DOC最高去除率分别为74%、75%、18%;SUVA最高去除率分别为64%、62%、19%。混凝可选择性去除腐殖酸来源的消毒副产物前体物,如对其单位DOC的卤乙酸生成势去除率最高为53%,三卤甲烷为45%。这种选择性作用在富里酸配水体系中不显著。混凝对三种腐殖质单位DOC的水合三氯乙醛生成势基本没有影响;二氯乙腈仅来源于富里酸,混凝对其单位DOC生成势最高可降低24%。当原水中富里酸含量较高时,不适合用常规工艺控制消毒副产物生成。No.1Humic acid,No.2humic acid,and indigenous fulvic acid were used to investigate the removal of DBPs precursors during coagulation process.When PAC dosage was between0 to 12mg/L,the optimal DOC removal rate of No.1humic acid,No.2humic acid,and indigenous fulvic acid could reach 74%,75%and 18%,respectively;as for SUVA,the highest removal rates were 64%,62% and 19%,respectively.The coagulation process could selectively remove DBPs precursors in humic acid;the highest removal rate for HAAFP/DOC was 53% and for THMFP/DOC was 45%.However,the selectivity was not obvious in the fulvic acid aqueous system.The coagulation process had little influence on CHFP/DOC of all three humic substances;DCAN was only observed in fulvic acid and the highest reduction of DCANFP/DOC was 24%.When fulvic acid proportion in source water is considerably large,the conventional process should not be adopted alone for DBPs control.

关 键 词：常规混凝 腐殖酸 富里酸 聚氯化铝 卤乙酸 三卤甲烷 

分 类 号：TU991.25[建筑科学—市政工程]