水体中不同相对分子质量有机质对饮用水消毒的影响

采用珠江广州河段一水源水作为研究对象,经预处理后,用Amicon YC-05,YM-1,YM-3,YM-10,YM-30,YM-100和ZM-500系列不同相对分子质量的超滤膜对其进行分离,分析各相对分子质量级别的可溶性有机物的DOC,同时,对所分离出的各种相对分子质量级别的DOM与消毒剂Cl2和ClO2作用.结果表明,在各个级别的DOM中,相对分子质量小于500的DOM占总DOM的一半以上,这表明该水源水已经严重地受到人为的污染;而且该相对分子质量级别的DOM也是消毒过程形成三卤甲烷的主要前驱物质.另外,这一类型的DOM在消毒过程中形成THMs与未分级的水源水也有较大的差别.

Effect on Trihalomethane Forming for Different Molecular Weight Dissolved Organic Matter in Water Resource

A raw water sample was collected from Guangzhou section of Pearl River to support experiment studies. The sample were passed through Amicon YC-05, YM-1, YM-3, YM-10, YM-30, YM-100 and ZM-500 series membranes after being pretreated. The molecular weight distribution of the isolate for each membranes were analyzed, and the isolates were disinfected by chlorine and chlorine dioxide. The results showed that the RO isolate was the main dissolved organic matter (DOM) in the water sample, which proved that the water was highly contaminated by human activities, and it was the main THMs precursor in the disinfection process with chlorine and chlorine dioxide for all the isolates. Meanwhile, the disinfection process for water sample contain DOM that its molecular smaller than 500 were very different from raw water.