Characterization of fluorescent-dissolved organic matter and identification of specific fluorophores in textile effluents
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- 作者：Wentao Li ; Zixiao Xu ; Qian Wu ; Yan Li…
- 关键词：Azo dyes ; Fluorescence excitation ; emission matrix ; 1 ; Amino ; 2 ; naphthol ; Soluble microbial products ; Textile effluent
- 刊名：Environmental Science and Pollution Research
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：22
- 期：6
- 页码：4183-4189
- 全文大小：898 KB
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- 刊物主题：Environment
Environment
Atmospheric Protection, Air Quality Control and Air Pollution
Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
Industrial Pollution Prevention - 出版者：Springer Berlin / Heidelberg
- ISSN：1614-7499
文摘
This study focused on the characterization of fluorescent-dissolved organic matter and identification of specific fluorophores in textile effluents. Samples from different textile wastewater treatment plants were characterized by high-performance liquid chromatography and size exclusion chromatography as well as fluorescence excitation-emission matrix spectra. Despite the highly heterogeneous textile effluents, the fluorescent components and their physicochemical properties were found relatively invariable, which is beneficial for the combination of biological and physicochemical treatment processes. The humic-like substance with triple-excitation peaks (excitation (Ex) 250, 310, 365/emission (Em) 460?nm) presented as the specific fluorescence indicator in textile effluents. It was also the major contributor to UV absorbance at 254?nm and resulted in the brown color of biologically treated textile effluents. By spectral comparison, the specific fluorophore in textile effluents could be attributed to the intermediate structure of azo dyes 1-amino-2-naphthol, which was transferred into the special humic-like substances during biological treatment.