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EEM-PARAFAC characterization of dissolved organic matter and its relationship with disinfection by-products formation potential in drinking water sources of northeastern China

机译:溶解有机质的EEM-PARAFAC表征及其与中国东北饮水来源消毒副产品形成潜力的关系

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摘要

Dissolved organic matter (DOM) is the precursor of disinfection by-products (DBPs) which is widely found in the aquatic environment. The analysis of DOM in raw water is helpful to evaluate the formation potentials of DBPs. However, there is relatively little research on the DOM identification of raw water in northern China. In this study, the variation in DOM in M reservoir water in one year by fluorescence excitation-emission matrix-parallel factor analysis (EEM-PARAFAC) was investigated to evaluate the DBP formation potential (DBPFP). The results suggested that five components, namely, two humic-like substances (C2, C3), two fulvic-like substances (C1, C4) and one protein-like substance (C5), were identified in the DOM of M reservoir water. The content of DOM in autumn and winter was higher than that in spring and summer. The source of DOM in the water body of M reservoir was mainly from terrestrial source, but less from aquatic source. The source, types and humi-fication degree of DOM affect the formation of DBPs. The formation potential of DBPs had the following order: tri-halomethanes (THMs) > dichloroacetic acid (TCAA) > trichloroacetic acid (DCAA) > chloral hydrate (CH). The formation potentials of THM and TCAA were strongly correlated with C2 (r_(THM) = 0.805, r_(TCAA) = 0.857). The formation potential of CH has a good correlation with C1 (r = 0.722). The formation of DCAA has a good correlation with C4 (r = 0.787). DOM and DBPFP were negatively correlated with the biological index (BIX) and fluorescence index (FI) of the raw water, and positively correlated with the humification index (HIX).
机译:溶解的有机物质(DOM)是副产物,其被广泛地在水生环境中发现(消毒副产物)消毒的前体。 DOM的原水的分析有助于评估消毒副产物的形成潜力。然而,原水在中国北方DOM识别的研究相对较少。在这项研究中,在DOM以M水库水在一年通过荧光激发 - 发射矩阵并行因子分析(EEM-PARAFAC)的变化进行了研究,以评估DBP的形成电位(DBPFP)。结果表明五个组件,即二个腐殖酸样物质(C2,C3),两个类富里酸的物质(C1,C4)和一种蛋白质样物质(C5),分别以M水库水的DOM识别。 DOM的秋冬季含量在春季和夏季高于。 DOM的M中贮存器的水体的来源,主要是从地面源,但是从水生来源以下。 DOM的来源,类型和HUMI-fication度影响消毒副产物的形成。消毒副产物的形成潜力具有下列顺序:三卤代甲烷(三卤甲烷)>二氯乙酸(TCAA)>三氯乙酸(DCAA)>水合氯醛(CH)。 THM和TCAA的形成电位以C2(R_(THM)= 0.805,R_(TCAA)= 0.857)显着相关。 CH的形成电位与C1(R = 0.722)的良好相关性。 DCAA的形成与C4(R = 0.787)的良好相关性。 DOM和DBPFP与生物指数(BIX)和原水的荧光指数(FI)呈负相关,并与腐殖化指数(HIX)正相关。

著录项

  • 来源
    《Science of the total environment》 |2021年第20期|145297.1-145297.9|共9页
  • 作者单位

    State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin 150090 China;

    State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin 150090 China;

    State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin 150090 China;

    State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin 150090 China;

    State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin 150090 China;

    State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin 150090 China;

    State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin 150090 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Dissolved organic matter; Excitation-emission matrices; PARAFAC; Disinfection byproducts; Formation potential;

    机译:溶解有机物;激发排放矩阵;paraf;消毒副产品;形成潜力;

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