基于EEMs和DOM分离的荧光特征及DBPsFP研究——以南方某市水源水为例

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摘要以南方某市饮用水源地源水为研究对象,利用三维荧光-区域积分法(3D-EEMs-FRI)和DAX-8树脂富集分离技术,研究了水样各组分的溶解性有机物(DOM)组成特征、三维荧光光谱(3D-EEMs)特征;采用生成潜能测试,考察了典型消毒副产物三卤甲烷(THMs)和卤代乙酰胺(HAcAms)生成势以及其与水质指标和荧光强度之间的相关性.结果表明:DOM中疏水性有机物(以UV₂₅₄表征)的比例超过70%.HOB(疏水碱性物质)组分主要含有酪氨酸类蛋白质和色氨酸类蛋白质,而HOA(疏水酸性物质)和HIS(亲水性物质)组分相对于HOB组分则含有较多的紫外区类富里酸.调查水样HOA、HOB、HON和HIS组分的三卤甲烷生成势(THMsFP)分别为151.5~194.1,60.6~65,123.4~189.9和104.1~187.1μg/L,而卤代乙酰胺生成势(HAcAmsFP)分别为2.7~3.7,n.d.~0.1,1.3~3.9和2.2~8.4μg/L,THMs和HAcAms前体物在HOA、HON和HIS组分中的分布比较均匀.UV₂₅₄(R²为0.93)、腐殖化指数(HIX)(R²为0.59)与THMsFP有良好的线性关系,可作为预测组分间THMsFP的指标.UV₂₆₀(R²为0.80)、溶解性有机氮(DON)(R²为0.74)与HAcAmsFP有较强的线性关系,可作为预测HAcAmsFP的参数.Pearson相关性分析显示,类富里酸物质区域(III、V)与THMsFP显著相关,该类物质为组分间THMs的重要前体物.荧光的区域积分可以有效预测组分间THMs和HAcAms的生成势.

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	蔡力童
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关键词 ：溶解性有机物, HAcAms前体物, 三维荧光光谱, 荧光区域积分, 消毒副产物生成势

Abstract：The characteristics of dissolved organic matter(DOM) and three-dimensional fluorescence spectroscopy(3D-EEMs) of each component of source water in South-China reservoir were analyzed by fluorescence regional integration(FRI) and Supelite DAX-8 Macroporous Resin. the relationship between disinfection by-products formation potential, water quality indicators and fluorescence intensity were also determinated. The proportion of hydrophobic substances in the reservoir was more than 70% of UV₂₅₄. The fraction of HOB(hydrophobic bases) mainly contained tyrosine-like proteins and tryptophan-like proteins, while the fraction of HOA(hydrophobic acids) and HIS(hydrophilic substances) contained more fulvic acid. The trihalomethane formation potentials (THMsFP) of HOA, HOB, HON and HIS fractions were 151.5~194.1μg/L, 60.6~65μg/L, 123.4~189.9μg/L and 104.1~187.1μg/L, respectively, and the haloacetamide formation potential(HAcAmsFP) were 2.7~3.7μg/L, nd~0.1μg/L, 1.3~3.9μg/L and 2.2~8.4μg/L, respectively. The precursors of THMs(trihalomethane) and HAcAms(haloacetamide) were distributed uniformly in HOA, HON and HIS fractions. UV₂₅₄(R²=0.93), HIX(R²=0.59) presented a good linear relationship with THMsFP, which can be used as an indicator for predicting THMsFP among fractions. UV₂₆₀(R²=0.80) and DON(R²=0.74) showed a relatively good linear relationship with HAcAmsFP, which can be used as the parameters for predicting HAcAmsFP. Pearson correlation analysis manifested that the two humus-like regions(III,V) were significantly correlated with the formation potential of THMs, which meant that these substances were important precursors of THMs of source water in the reservoir. The formation potential of THMs and HAcAms can be predicted by the fluorescence regional integration among the fractions.

Key words： dissolved organic matter HAcAms precursors three-dimensional fluorescence spectroscopy fluorescence regional integration disinfection by-products formation potential

收稿日期: 2021-08-25

PACS:	X502
	X524

基金资助:国家自然科学基金资助项目(51878582,41801219);福建省科技计划引导性资助项目(2021Y0041);福建省自然科学基金资助项目(2020J01256,2019J01849);福建省高校新世纪优秀人才支持计划项目(JA14227)

通讯作者: 李青松,研究员,leetsingsong@sina.com E-mail: leetsingsong@sina.com

作者简介: 蔡力童(1997-),男,福建福州人,厦门理工学院硕士研究生,主要研究方向为水处理理论与技术.发表论文1篇.

引用本文:

蔡力童, 李青松, 马晓雁, 李国新, 陈国元, 王吉苹, 赖成然, 梁馨蕊. 基于EEMs和DOM分离的荧光特征及DBPsFP研究——以南方某市水源水为例[J]. 中国环境科学, 2022, 42(4): 1745-1753. CAI Li-tong, LI Qing-song, MA Xiao-yan, LI Guo-xin, CHEN Guo-yuan, WANG Ji-ping, LAI Cheng-ran, LIANG Xin-rui. Study on the fluorescence characteristics and DBPsFP based on EEMs and fraction of DOM—— a case of source water in a southern city. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(4): 1745-1753.

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