Excitation-Emission Matrix Fluorescence Spectra Characteristics of DOM in a Combined Constructed Wetland
Lü Jing-jing1, 2, 3, ZHANG Lie-yu3, XI Bei-dou3, HOU Li-an1, 4*, LI Ming4
1. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China 2. Zhongyuan University of Technology, Zhengzhou 450007, China 3. Chinese Research Academy of Environmental Science, Beijing 100012, China 4. The Second Artillery Engineering University, Xi’an 710025, China
Abstract：Using three-dimensional fluorescence technology, we studied fluorescent characteristics of two polluted rivers by a surface flow+vertical flow combined constructed wetlands of dissolving organic matter. The results showed that (1) the main sources of water-soluble humic organic matter in constructed wetland was biological metabolic input instead of terrigenous input; (2) in the later section of the surface flow constructed wetland, part of proteinoid substance changed into fulvic acid-like substance, which showed that the composition of dissolved organic matter and material structure tended to be stable after surface flow combined constructed wetland treatment; (3) it was of great significance that surface flow constructed wetland in structure transformation of water soluble organic matter, which could significantly improve the stability of water soluble organic matter. Surface flow+vertical flow combined constructed wetland process of dissolved organic matter had a good removal effect.
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