Characterization of dissolved organic matter in urban sewage using excitation emission matrix fluorescence spectroscopy and parallel factor analysis

查看全文 作　　者：Weidong [1,2]Guo;Jing [1]Xu;Jiangping [1]Wang;Yingrou [1]Wen;Jianfu [1]Zhuo;Yuchao [1]Yan

机构地区：[1]State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China.;[2]Joint Key Laboratory of Coastal Study (XMU & FJIO), Xiamen University, Xiamen 361005, China

出　　处：《Journal of Environmental Sciences》索引2010年第22卷第11期,共7页

基　　金：supported by the National Natural Science Foundation of China(No.40776041,40676046);the National High Technology Research and Development Program of China(No.2007AA091704);the Program for New Century Excellent Talents in Fujian Province University 摘　　要：Wastewater dissolved organic matter (DOM) from different processing stages of a sewage treatment plant in Xiamen was characterized using fluorescence and absorption spectroscopy. Parallel factor analysis modeling of excitation-emission matrix spectra revealed five fluorescent components occurring in sewage DOM: one protein-like (C1), three humic-like (C2, C4 and C5) and one xenobiotic-like (C3) components. During the aerated grit chamber and primary sedimentation tank stage, there was only a slight decrease in fluorescence intensity and the absorption coefficient at 350 nm (a 350 ). During the second aeration stage, high concentration of protein-like and short-wavelength-excited humic-like components were significantly degraded accompanied by significant loss of DOC (80%) and a 350 (30%), indicating that C1 and C2 were the dominant constituents of sewage DOM. As a result, long-wavelength-excited C4 and C5 became the dominant humic-like components and the DOM molecular size inferred from the variation of spectral slope S (300-650 nm) and specific absorption (a 280 /DOC) increased. Combination use of F max of C1 and the ratio of C1/C5, or a 350 may provide a quantitative indication for the relative amount of raw or treated sewage in aquatic environment. 关键词：荧光光谱污水利用因子分析有机物质矩阵显示发射光谱水溶解平行

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Characterization of dissolved organic matter in urban sewage using excitation emission matrix fluorescence spectroscopy and parallel factor analysis

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