污水中溶解性有机物组分特性及其氯消毒副产物生成潜能  

Characteristics and Chlorinated Disinfection By-products Formation Potential of Dissolved Organic Matter Fractions in Treated Wastewater

作　　者：孙迎雪[1] 吴乾元[1] 田杰[1] 王丽莎[1] 胡洪营[1] 

机构地区：[1]清华大学环境科学与工程系,环境模拟与污染控制国家重点联合实验室,北京100084

出　　处：《环境科学》2009年第8期2282-2287,共6页Environmental Science

基　　金：国家杰出青年科学基金项目(50825801);国家高技术研究发展计划(863)项目(2008AA062502)

摘　　要：以城市污水厂二级出水为研究对象,采用大孔吸附树脂将污水中溶解性有机物分离成亲水性物质、疏水酸性物质、疏水中性物质和疏水碱性物质4个组分,分析了各组分的有机物特性、三维荧光光谱特征和氯消毒副产物生成潜能.结果表明,亲水性物质和疏水酸性物质分别占水样中溶解性有机碳的33%和30%,其中亲水性物质相对含有较多的生物源腐殖质类物质,疏水酸性物质相对含有更多的芳香族蛋白质和溶解性微生物代谢产物类物质.氯消毒后,亲水性物质的三卤甲烷生成潜能分别为630.4μg.L-1,占污水三卤甲烷生成潜能的73.7%.亲水性物质和疏水酸性物质的卤乙酸生成潜能分别为644.6μg.L-1和123.2μg.L-1,是污水氯消毒副产物的主要前体物.Dissolved organic matter （DOM） from a biological treated wastewater of municipal wastewater treated plant was isolated and fractionated using resin adsorption into four different fractions. These fractions are operationally categorized as hydrophilic substances （HIS）, hydrophobic acids （HOA）, hydrophobic neutrals （HON）, and hydrophobic bases （HOB）. The dissolved organic carbon （DOC） and specific UV absorbance, characteristics of three dimensional excitation emission matrix fluorescence spectroscopy （3DEEM） and disinfection byproducts formation potential of each fraction was investigated in this paper. The results showed that HIS and HOA were the main fractions and occupied 33% and 30% of DOC in the treated wastewater sample, respectively. The fraction of HIS contained more humus, which were predominately microbially derived, while the fraction of HOA contained more aromatic proteins and soluble microbial products by the analysis of 3DEEM. The chlorinated trihalomethane formation potential （THMFP） of HIS fraction was 630.4 μg·L^-1 and occupied 73.7% of that formed in wastewater sample. The chlorinated haloaeetie acids formation potential （HAAFP） of HIS and HOA fractions were 644.6 μg·L^-1 and 123.2 μg·L^-1, which was found to be the most reactive precursor in the fractions of treated wastewater to the disinfection by-products formation.

关 键 词：污水再生利用 溶解性有机物组分 三维荧光光谱 氯消毒 消毒副产物生成潜能 

分 类 号：X502[环境科学与工程—环境工程]