中文摘要：

采用腐殖酸模拟天然水体中消毒副产物前体物，探求了氯氨比、氯胺投加量、总有机碳（TOC）浓度和Br一浓度在氯胺消毒过程中对消毒副产物——三卤甲烷（THMs）生成量的影响。结果表明：（1）随着氯氨比的降低，THMs及各组分的生成量显著减少。（2）THMs的生成量均随着氯胺投加量的增加而增加，且都呈现出了良好的线性关系。当氯胺投加量大于7．0mg／L时，氯代卤化物成了优势产物。（3）随着TOC浓度的增加，THMs生成量增加，且具有一定的线性关系；三氯甲烷和一溴二氯甲烷生成量均增加，氯氨比为3：1（质量比，下同）时三氯甲烷和一溴二氯甲烷生成量增加了9．86、7．80μg／L，氯氨比为5：1时则分别增加了15．21、13．62μg／L；三溴甲烷和二溴一氯甲烷生成量均呈现先增加后减少的趋势。（4）随着Br-浓度的增加，THMs、一溴二氯甲烷、二溴一氯甲烷和三溴甲烷生成量均增加，三氯甲烷生成量减少。溴化物的存在会促进THMs的产生。

英文摘要：

In this paper,humic acid was selected as the precursors of disinfection by-products to investigate the influence of C1/NH＋ ratio, chloramine dosage, TOC and Br- concentration on the production of trihalomethanes （THMs） during natural water chloramines disinfection process. The results revealed that the production of different THMs components was decreased significantly with the decreasing C1/NH＋ ratio;THMs production was liner corre- lated with chloramine dosage, they had positive correlation with each other. Chlorine halogenated was found to be the advantage products when chlorarnine dosage was more than 7.0 mg/L. THMs production was linearly increased with the increasing of TOC concentration,the production of trichloromethane and bromodichloromethane was increased by 9.86,7.80 μg/L under the C1/NH＋ mass ratio of 3 ： 1, they were separately increased by 15.21,13.62 μg/L when C1/NH＋ mass ratio was 5 ： 1. The production of trichloromethane and bromodichloromethane increased first and then decreased with the rising TOC concentration. The existence of bromide could promote the formation of THMs, the production of THMs,bromodichloromethane, dibromochlor and bromoform all increased with the increasing of Br- concentration,while the trichloromethane presented the different variation tendency.