三维荧光与平行因子研究黑臭河流DOM

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Abstract Excitation-emission matrix (EEM) fluorescence spectroscopy combined with parallel factor analysis (PARAFAC) and multivariable analysis were employed to analysis the components and source of dissolved organic matter (DOM) and to reveal their correlations with water quality in five black and odorous water bodies in Shenyang. DOM was decomposed into three components by PARAFAC, including protein-like component C1(235,360), fulvic-like component C2(220,430) and humic-like component C3(255,520). Based on principal component analysis, C2 exhibited close positive correlations with COD_Cr, NH₄⁺-N, S^2- and TP, and good negative correlations with DO and transparency. C2 mainly derived from terrestrial organic matter. C2had a better positive correlation with C3, indirectly proving that C2 and C3 could originate microbial endogenous. The results indicated that the contribution rate of terrestrial organic matter and microbial endogenous to the DOM of black and odorous water bodies was as high as 61.2% and 25.5%, respectively. There were significant differences about the five black and odorous water bodies in water quality, tributary I and Ⅱ were serious black-odorous, whereas tributary Ⅲ, IV and V were mild black-odorous.

Key words： DOM parallel factor analysis (PARAFAC) black and odorous water body principal component analysis

Received: 16 June 2017

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X524

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2018/V38/I1/311

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