南方某河流原水中消毒副产物前体物的季节性变化

Seasonal Variation of Disinfection By-products Precursors of River Source Water

对我国南方桌河流原水进行了一个水文年的监测，通过树脂吸附法等手段对水样中的有机物进行分离富集，分析了藻类及颗粒性有机物、溶解性有机物中不同极性组分对消毒副产物（DBPs）的贡献，同时分析其季节性变化规律。研究发现，原水中DBPs的生成势与有机物含量的变化基本一致，三卤甲烷、卤乙酸和三氯乙醛等3类DBPs前体物含量均在夏季最高；藻类及颗粒性有机物对DBPs的贡献率为6．07％～30．69％，且对三氯乙醛的贡献率要大于对三卤甲烷和卤乙酸的贡献率；原水中的溶解性有机物在春夏季以亲水性有机物为主，而在秋冬季则以强疏水性有机物为主，并且成为主要的DBPs前体物。

A river source water in the south of China was monitored over a hydrological year. The organic matter in the water samples was separated and enriched by resin adsorption method and other means. The contributions of the algae and the different polar components in particulate organic matter and dissolved organic matter to disinfection by-products （DBPs） as well as their seasonable variation were an- alyzed. The results indicated that the formation potential of disinfection by-products in the source water was basically similar to the change in organic matter content, and the maximum concentrations of triha- lomethanes, haloacetic acids and chloral hydrate were detected in summer. The contribution rate of algae and particulate organic matter to disinfection by-products was 6.07% to 30.69%, and the contribution rate to chloral hydrate was higher than those to trihalomethanes and haloaeetic acids. As primary disinfec- tion by-products precursors, dissolved organic matter was hydrophilic in spring and summer and hydro- phobic in autumn and winter.