光谱表征评价2种不同预处理工程对DOM去除特征  

SPECTRAL CHARACTERIZATION OF ORGANIC REMOVAL PERFORMANCE OF TWO DIFFERENT WATER SOURCE PRETREATMENT PROJECTS

作　　者：马卫星[1] 邹立航 李璇 李朝霞[1] 马志强 杜洪秋 丁成[1] 吴向阳 MA Weixing;ZOU Lihang;LI Xuan;LI Zhaoxia;MA Zhiqiang;DU Hongqiu;DING Cheng;WU Xiangyang(College of Environmental Science and Engineering,Yancheng Institute of Technology,Yancheng 224051,China;School of Environmental and Safety Engineering,Jiangsu Universily,Zhenjiang 212013,China)

机构地区：[1]盐城工学院环境科学与工程学院,江苏盐城224051 [2]江苏大学环境与安全工程学院,江苏镇江212013

出　　处：《环境工程》2022年第8期150-158,61,共10页Environmental Engineering

基　　金：国家自然科学基金项目(51878587、51808480);江苏省自然科学基金青年基金项目(BK20160439);江苏省普通高校研究生科研创新计划项目(SJCX19-1040)。

摘　　要：为探究不同类型微污染水源预处理工程对水中溶解性有机物的去除特征,采用光谱表征结合多元统计方法,对盐龙湖预处理工程和通榆河预处理工程夏季各处理单元进出水水质进行研究。结果表明:夏季蟒蛇河及通榆河原水DO含量低于Ⅲ类水标准,蟒蛇河原水中a(254)较高,而通榆河原水中COD_(Mn)、BOD_(5)较高。盐龙湖预处理工程与通榆河预处理工程对COD_(Mn)、BOD_(5)、a(254)的去除率分别为4.19%、37.50%、1.55%和10.31%、23.49%、24.88%;从分子结构来看,盐龙湖预处理工程的预处理单元与通榆河预处理工程的高密度沉淀单元对DOM的改变最为明显,使DOM的浓度下降、分子量变小、苯环C的聚合程度增加。差异性分析表明:SR与E_(465)/E_(665)、A_(2)/A_(1)、A_(3)/A_(1)呈显著正相关,a(355)与E_(250)/E_(365)呈显著负相关。该研究结果可为微污染水源预处理工程的优化运行及保障城市饮用水安全提供数据参考。Spectral characterization combined with multivariate statistical method was used to monitor and analyze the variation of organic matter concentration and spectral indexes in the inlet and outlet water of each treatment unit in the Yanlong project and Tongyu project in Yancheng.The results showed that the content of dissolved oxygen in the raw water of the Tongyu River and the Mangshe River was lower than that of the classⅢin surface water quality standards in summer.In terms of organic concentration,a(254)was higher in raw water of Yanlong Lake,while COD_(Mn) and BOD_(5) were higher in raw water of Tongyu River.The removal rates of COD_(Mn),BOD_(5),a(254)and a(355)in the pretreatment engineering of Yanlong Lake and Tongyu River were 4.19%,37.50%,1.55%and 10.31%,23.49%,24.88%,respectively.From the perspective of molecular structure,the pretreatment unit of Yanlong project and high-density sedimentation unit of Tongyu project had the most obvious changes on DOM,resulting in a decrease in DOM’s concentration and molecular weight,and a rise in the degree of polymerization of carbon atoms in benzene ring.The difference analysis showed that SR and E_(465)/E_(665) had a significant positive correlation with A_(2)/A_(1) and A_(3)/A_(1) at 0.01 level,while a(355)had a significant negative correlation with E_(250)/E_(365) at 0.01 level.The research results provide a theoretical basis for optimizing the operation of micro-polluted water source pretreatment engineering and safety ensuring of urban drinking water supply.

关 键 词：微污染水源 DOM 紫外光谱 预处理工程 

分 类 号：TU991.2[建筑科学—市政工程]