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Weidong Guo Jing Xu Jiangping Wang YingrouWen Jianfu Zhuo Yuchao Yan 《环境科学学报(英文版)》2010,22(11):1728-1734
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 (a350). 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 a350 (30%), indicating that C1 and C2 were the dominant constituents of sewage DOM. As a result, long-wavelengthexcited
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 (a280/DOC) increased. Combination use of Fmax of C1 and the ratio of C1/C5, or a350
may provide a quantitative indication for the relative amount of raw or treated sewage in aquatic environment. 相似文献
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