Behavior and Properties of Humic Substances in Environmental Waters

腐殖质是淡水的主要有机成分，它与有毒重金属相互作用强烈，可能是氯处理水过程中形成的三卤甲烷(THM)的前体。然而，关于腐殖质在环境水中行为的研究报道很少。本研究对腐殖质在环境水体中的行为和性质进行了研究。1)用二乙氨基乙基(DEAE)-纤维素浓缩，离心后测定河水中的腐植酸和黄腐酸。用该方法研究了江河和其他河流中腐殖质的行为和来源。河流中三卤代甲烷的生成潜力与可溶性腐殖质和溴离子呈高度正相关。2)建立了环境水体中腐殖质的分子筛层析分离荧光光谱分析新方法。季节资料表明，高分子腐殖质在温暖季节的比例高于凉爽季节。

Humic substances, which interact strongly with toxic heavy metals and may be precursors of trihalomethane (THM) formed during water treatment with chlorine, are the major organic constituents of fresh water. However, few studies about the behavior of humic substances in environmental water have been reported. In this research, the behavior and properties of humic substances in environmental waters were investigated. 1) Humic and Fulvic acids in river waters were determined by concentration with diethylaminoethyl (DEAE) - cellulose followed by centrifugation. The behavior and source of humic substances in Yodo River and other rivers were studied by the present method. Trihalomethane formation potential in rivers showed a high correlation with soluble humic substances and bromide ion. 2) New simultaneous method for determination and fractionation of humic substances in environmental waters were developed by fluorescence spectrometry after separation with sizeexclusion chromatography. It was found that the ratio of higher molecular humic substances in warmer seasons is higher than that in cooler seasons on seasonal data.