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 |
摘要点击 4686 全文点击 2156 投稿时间:2013-07-18 修订日期:2013-09-11 |
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中文关键词 溶解有机质 消毒副产物 N-亚硝基二甲胺 比吸收系数 腐殖化指数 |
英文关键词 dissolved organic matter disinfection byproducts N-nitrosodimethylamine specific absorption coefficient humification index |
作者 | 单位 | E-mail | 董倩倩 | 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 | dong033407103@163.com | 张艾 | 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 | | 李咏梅 | 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 | | 陈玲 | 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 | | 黄清辉 | 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 | qhhuang@tongji.edu.cn |
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中文摘要 |
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. |
英文摘要 |
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 SUVA254 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. |
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