京密引水中不同形态天然有机物的卤代活性  

Halogenated organics from various fractions of natural organic compounds in water from Jingmi Canal

作　　者：刘文新[1] 陶澍[1] 王永华[1] 

机构地区：[1]北京大学城市与环境学系,中国科学院生态环境中心水环境化学国家重点开放实验室

出　　处：《中国环境科学》1996年第5期369-372,共4页China Environmental Science

基　　金：国家自然科学基金;杰出青年基金

摘　　要：用过滤、ＸＡＤ－８和ＸＡＤ－４树脂串联吸附等方法将京密引水中的天然有机物定量分离为悬浮固体、憎水有机物、腐殖酸类化合物，ＸＡＤ－４酸和其它亲水有机物。分别对不同形态有机物进行氯化处理，测定了产物中的挥发性卤代烃。结果表明，京密引水中天然有机物的主要挥发性氯化产物是氯仿，此外还生成一溴、二溴氯甲烷及少量溴仿。溶解态腐殖酸类化合物的悬浮固态和悬浮固态有机物是生成氯仿的最主要母体。亲水有机酸也具有较高的卤代活性，而其它有机成分则表现出相对惰性。Total natural organic carbon in water from Jingmi Canal was separted into several fractions of suspended solid organic compounds, hydrophobic compounds, humic substances, XAD-4 acids and other and other hydrophilic organics. The individual fractions were chlorinated and the volatile halogented compounds generated during the chioriation were determined. The primary product of the chlorination was chloroform. Bromodichloromethane, dibromochlomethane and tribromomethane were detected as well. The humic substances and the suspended solid organics were the moot important precursors of chloroform i the dissolved hydrophilic acids also possessed high halogenated activity:while other organic solutes showed relative inertia.

关 键 词：河水 氯化 TOC 形态分析 氯仿 卤代烃母体 

分 类 号：X522.02[环境科学与工程—环境工程]