黄浦江溶解有机质光学特性与消毒副产物NDMA生成潜能的关系  

Linking Optical Properties of Dissolved Organic Matter with NDMA Formation Potential in the Huangpu River

作　　者：董倩倩[1] 张艾[2] 李咏梅[2] 陈玲[2] 黄清辉[1] 

机构地区：[1]同济大学环境科学与工程学院,长江水环境教育部重点实验室,上海200092 [2]同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境科学》2014年第3期958-963,共6页Environmental Science

基　　金：国家自然科学基金项目(41071301,50878165);中央高校科研基本业务费专项(0400219216)

摘　　要：对黄浦江表层水样的过滤液进行紫外吸收光谱和荧光光谱扫描,并测定了溶解有机碳(DOC)、N-亚硝基二甲胺(NDMA)及其生成潜能(NDMA-FP),探讨了黄浦江溶解有机质(DOM)的光学特性与消毒副产物NDMA生成潜能的关系.结果表明,黄浦江水中NDMA-FP随DOC浓度增加而增加(r=0.487,P<0.01),但与DOM的比吸收系数(SUVA254)和腐殖化指数(HIX)均呈负相关(r=-0.605,P<0.01;r=-0.396,P<0.01);NDMA-FP还与相对较低分子量的类酪氨酸、类色氨酸等类蛋白物质的荧光强度呈显著正相关(r=0.421,P<0.01;r=0.426,P<0.01),而与类腐殖质的荧光强度则呈显著负相关(r=-0.422,P<0.01).因此,黄浦江水中消毒副产物NDMA的生成潜能随着溶解有机质含量的增加而增加,特别是与DOM中的类蛋白组分含量密切相关,但随着DOM的芳香性和腐殖化程度的增强而减少.Surface water samples from the Huangpu River were filtered to measure the UV absorption and fluorescence spectrum. Dissolved organic carbon （DOC） , N-nitrosodimethylamine （NDMA） , and its formation potential （NDMA-FP） were also analyzed to explore relationships between the properties of dissolved organic matter （DOM） and the formation potential of disinfection byproducts- NDMA in the Huangpu River. The study found that： NDMA-FP concentration increased with the increasing of DOC concentration （ r = 0. 487, P 〈0. 01 ） , but it had negative relationships with SUVAz54 and HIX （ r = - 0. 605, P 〈 0. 01 ; r = - 0. 396, P 〈 0. 01 ）. NDMA-FP concentration had positive relationships with the fluorescence intensity of protein-like substances such as low-molecular-weight （LMW） tyrosine-like and tryptophan-like substances （r = 0. 421, P 〈 0.01 ; r = 0. 426, P 〈 0.01 ） , but had a negative relationship with humic-like substance （ r = - 0. 422, P 〈 0.01 ）. Therefore, NDMA formation potential increases with the increasing DOM content in the Huangpu River, which is significantly related with the protein-like substances, but decreases with the increasing aromaticity and humification of DOM.

关 键 词：溶解有机质 消毒副产物 Ⅳ 亚硝基二甲胺 比吸收系数 腐殖化指数 

分 类 号：X522[环境科学与工程—环境工程]