农业环境科学学报2012，Vol.31Issue(10)：2006-2012,7.
贵州红枫湖溶解有机质不同分离组分的卤代活性研究
Chlorination Activity of Dissolved Organic Matter Fractions in Hongfeng Lake, Guizhou, China
摘要
Abstract
Disinfection by-products for using chlorine to disinfect in drinking water have been resulted in great threat for the health of human being. Lake Hongfeng, a man-made reservoir, serves as the principal drinking water resource for Guiyang City, Guizhou Province. With XAD resins and ion exchange resins, dissolved organic matter in Hongfeng Lake was extracted and separated into 6 fractions, i.e. fulvic acid, humic acid, hydrophobic neutrals, hydrophilic acids, hydrophilic bases and hydrophilic neutrals. Those fractions were characterized by elemental analysis, UV absorbance, and acid functional groups titration. The ehlorination reactivity and total trihalomethanes were analyzed and compared, and their possible origins were also investigated. Results showed that fulvic acid was the main component among the 6 fractions, and accounted for 56% of the total extracted dissolved organic carbon. Higher Carbon content in hydrophobic fractions was observed than that in hydrophilic fractions. Chloroform and bromodichloromethane were the major chlorination by -products. Compared to other fractions, fulvic acid had higher chloroform reactivity. There was significant correlation between the chlorination activity of 6 different DOM fractions and their SUVA254 and hydroxybenzene content. Fulvic acid was the most important precursor of total trihalomethanes, and produce 76% of disinfection by-products. The range distribution of 13C stable isotope and C/N ratio further suggested that fulvic acid was mainly derived from the terrestrial organic matter, while other fractions originated from both allochthonous and autochthonous sources. Therefore, controlling the input of allochthonous organic matter maybe an effective way of reducing the precursor of disinfection by-products in Hongfeng Lake.关键词
红枫湖/溶解有机质/氯化消毒/卤代活性/富里酸/来源Key words
Hongfeng Lake/ dissolved organic matter/ chlorine disinfection/ chlorination reactivity/ fulvic acid/ origin分类
资源环境引用本文复制引用
王立英,张润宇,吴丰昌..贵州红枫湖溶解有机质不同分离组分的卤代活性研究[J].农业环境科学学报,2012,31(10):2006-2012,7.基金项目
国家自然科学基金项目(40903051,41273148) （40903051,41273148）
贵州省科技厅社发攻关计划项目(黔科合SY[2010]3035) （黔科合SY[2010]3035）
贵州省科学技术基金(黔科合J字[2008]2225) （黔科合J字[2008]2225）
