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| Fluorescence
Spectral Characteristics of Dissolved Organic Matter in Jilin Section of
Songhua River. |
ZOU Jiying1, HE Haonan1, CHEN Wenhui1**,
LIU Hui1*, WENG Shirui2, QIU Zezu1**
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| School of Resource and
Environmental Engineering,Jilin Institute of Chemical Technology, Jilin City 132022, China, ; 2.Shanghai
Dongzhen Environmental Protection Engineering Technology Co., Ltd,
Shanghai,201203 |
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Abstract Dissolved
organic matter (DOM) is widely present in the water ecosystems of the natural
world and is a major component of organic matter in aqueous phase. It
participates in various biogeochemical processes in water ecosystems and has a
significant impact on the structure and function of water ecosystems, making it
a hotspot and a difficult point of research in environmental science. In order
to explore the existence form of DOM in the Songhua River, the
three-dimensional fluorescence spectrum of DOM in the water environment of
Songhua River, Jilin City section was measured, and the abundance, fluorescence
peaks and fluorescence parameters of FDOM in the Songhua River, Jilin City
section were analyzed. The DOM's three-dimensional fluorescence spectrum was resolved
by using the fluorescence region integration method, and the structural
composition characteristics of DOM were obtained. The results show that the
rivers in the urban concentrated area and industrial area have higher FDOM
concentrations, and the water body DOM has four fluorescence peaks. The DOM
fluorescence peak of the industrial river shows high content of humic-like
substances, and the DOM fluorescence peak of the urban concentrated area river
shows high content of protein-like fluorescence. The DOM in the rivers of the
urban concentrated area and industrial area also has higher fluorescence index
(FI), humification index (HIX) and autochthonous source index (BIX). Through
the analysis by the fluorescence region integration method, the highest content
of humic-like substances in the river DOM, followed by fulvic acid-like
substances and dissolved microbial metabolic products.
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Published: 25 July 2024
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