典型重污染水体枯水期溶解性有机质光谱特征及其与水质的相关性  

Spectral characteristics of dissolved organic matter in typical heavy polluted water during dry season and its relationship with water quality

作　　者：刘润东 顾鑫才 陈重军[1] 姜晶 LIU Run-dong;GU Xin-cai;CHEN Chong-jun;JIANG Jing(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology,Suzhou 215009,China;Institute of Agricultural Resources and Environmental Sciences,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]城市生活污水资源化利用技术国家地方联合工程实验室,江苏苏州215009 [3]江苏省农业科学院农业资源与环境研究所,江苏南京210014

出　　处：《江苏农业学报》2023年第7期1510-1518,共9页Jiangsu Journal of Agricultural Sciences

基　　金：国家自然科学基金青年项目(42007131)。

摘　　要：利用紫外可见光谱分析、三维荧光光谱结合平行因子法研究了佛山市典型重污染水体(汾江河水系和佛山水道水系)溶解性有机质(DOM)的来源与性质,在此基础上分析了DOM的光谱特征及其与水质的相关性。结果表明,两条水系水质均较差,氮、磷含量超标严重,部分采样点位为重污染水体。两条水系DOM主要包括3个荧光组分,其中C1和C2组分为类腐殖质,C3组分为类蛋白质。2021年1月的汾江河水系有大分子芳香性物质输入,此外其他采样时间两条水系DOM均表现为低相对分子质量、低芳香性和高亲水性特征。DOM荧光组分C1、C2、C3与总磷(TP)含量、溶解性有机碳(DOC)含量、化学需氧量(COD Cr)均极显著正相关(P<0.01),C1、C2与DO含量极显著负相关(P<0.01),C3与DO含量显著负相关(P<0.05),表明在重污染水体中其基本水质指标受到DOM输入、微生物活动和光化学转化等因素的综合影响。主成分分析结果表明,两条水系DOM与总氮(TN)、铵态氮(NH_(4)^(+)-N)、TP和COD Cr具有较强的同源性,均受陆源输入和内源生物作用的影响,外源输入影响较大。在重污染水体中可用DOM的光谱参数快速预测水体富营养化状态。本研究结果可为重污染水环境治理修复提供理论依据。Sources and properties of dissolved organic matter(DOM)in typical heavily polluted river systems(Fenjiang River system and Foshan waterway system)were studied by using ultraviolet-visible spectroscopy,three-dimensional fluorescence spectroscopy and parallel factor analysis.On this basis,the spectral characteristics of DOM and their relationships with water quality were analyzed.The results showed that the water quality of the two water systems was not optimistic,the nitrogen and phosphorus contents exceeded the standards of China,and some sampling points were heavily polluted water bodies.The DOM in the two water systems mainly included three fluorescent components,with C1 and C2 components being humic-like substances and C3 component being protein-like substances.In January 2021,macromolecular aromatic substances were input into Fenjiang River system.In addition,the DOM of the two water systems showed relatively low molecular weight,low aromaticity and high hydrophilicity during other sampling times.The fluorescence components C1,C2 and C3 of DOM were significantly positively correlated with total phosphorus(TP)content,dissolved organic carbon(DOC)content and chemical oxygen demand(COD Cr)(P<0.01),C1 and C2 were significantly negatively correlated with DO content(P<0.01),and C3 was significantly negatively correlated with DO content(P<0.05),indicating that the basic water quality indices in heavily polluted water were affected by DOM input,microbial activity and photochemical transformation.The results of principal component analysis showed that the DOM of the two rivers had strong homology with total nitrogen(TN),ammonium nitrogen(NH_(4)^(+)-N),TP and COD Cr,which were affected by terrestrial inputs and endogenous biological processes.Exogenous inputs had a greater impact.The spectral parameters of DOM can be used to quickly predict the eutrophication status of water in heavily polluted water.The results of this study can provide a theoretical basis for subsequent efficient water environment treatments.

关 键 词：重污染水体 溶解性有机质 三维荧光光谱 平行因子分析 紫外可见光谱分析 

分 类 号：X52[环境科学与工程—环境工程] X832