4种氨基酸氯消毒后典型卤代碳、氮类消毒副产物生成潜能的研究  

Formation Potential of Halogenated C-,N-Disinfection By-Products from Chlorination of Four Selected Amino Acids in Drinking Water

作　　者：鲁金凤[1,2] 刘烜辰 冯瑛[1] 安怡然[1] 郭昊[1] 赵洪辰[1] 周心怡[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]环境污染过程与基准教育部重点实验室(南开大学),天津300071

出　　处：《天津大学学报（自然科学与工程技术版）》2015年第7期632-636,共5页Journal of Tianjin University：Science and Technology

基　　金：天津市应用基础及前沿技术研究计划资助项目(14JCYBJC22900);国家自然科学基金资助项目(51008162);国家大学生创新科研资助项目(201410055113);南开大学百项工程资助项目(BX11347)

摘　　要：为了明确不同特性天然氨基酸的典型卤代碳、氮类消毒副产物的生成潜能,选取4种结构构造不同的代表性天然氨基酸为研究对象,考察了氯化消毒过程中的三卤甲烷、卤乙酸和三氯硝基甲烷的生成潜能.结果表明,4种氨基酸氯消毒后三卤甲烷的生成潜能很低,这些氨基酸并不是三卤甲烷的主要前驱物,而是毒性更高的卤乙酸的主要前驱物.具有吲哚杂环结构的色氨酸是三氯乙酸和三氯硝基甲烷的主要前驱物;具有脂肪类结构的甘氨酸更易于生成一氯乙酸,其卤乙酸生成潜能也最高,侧链具有羟基官能团结构的苏氨酸的卤乙酸生成潜能相对低,碱性氨基酸类的赖氨酸的三氯硝基甲烷生成潜能最弱,不是三氯硝基甲烷的主要前驱物.The aim of this work was to investigate the formation potential of halogenated carbonaceous disinfection by-products(C-DBPs)and nitrogenous disinfection by-products(N-DBPs)of natural amino acids with different charac-teristics. Four typical natural amino acids with different structures were selected to investigate the formation potential of trihalomethane(THM),haloacetic acids(HAAs)and trichloronitromethane(TCNM)during chlorination. Re-sults showed that these four amino acids are not the precursors of the THMs as their low formation potential,while they are the main precursors of the HAAs with much higher formation potential. Tryptophan,with the side chains of indole ring,is the most important precursors of trichloroacetic acid and TCNM. Glycine,with side chains of aliphatic structure,generated chloroacetic acid more easily concentration and the highest formation potential of HAAs. How-ever,threonine with the side chains of the hydroxyl groups structure had the least formation potential of HAAs,and the alkaline amino acids-lysine couldn’t be the precursor of TCNM because of its weaker formation potential of TCNM.

关 键 词：三氯硝基甲烷 三卤甲烷 卤乙酸 氨基酸 消毒副产物 

分 类 号：X703.1[环境科学与工程—环境工程]