Spectroscopy and Spectral Analysis, Volume. 45, Issue 2, 591(2025)

Characterization of DOM Sources and Distribution in Changdang Lake Based on 3D Fluorescence Combined With PARAFAC Approach

HUAN Juan1, ZHENG Yong-chun1, XU Xian-gen2, ZHANG Hao1, YUAN Jia-long1, LI Xin-cheng1, and ZHOU Li-wan2、*
Author Affiliations
  • 1School of Computer Science and Artificial Intelligence, Changzhou University, Changzhou 213164, China
  • 2Changzhou Institute of Environmental Sciences, Changzhou 213022, China
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    Lake water quality directly affects the surrounding ecology, human health, and economy. Pressures from modern industrialization and urbanization pose significant challenges to lake water quality, necessitating a thorough understanding of its changes, identification of pollution sources, and implementation of effective measures to maintain ecological health and ensure safe drinking water. Therefore, this study utilized Three-Dimensional Excitation Emission Matrix Spectroscopy (3DEEMs) and Parallel Factor Analysis (PARAFAC) to analyze the fluorescence spectra of dissolved organic matter (DOM) in the water from Changdang Lake and its surrounding surface sources in 2022. It explored the sources and spatiotemporal distribution of DOM fluorescence components in Changdang Lake and compared the similarity between the fluorescence of surface sources and lake water. Results revealed that the DOM in Changdang Lake primarily consists of two fluorescence components: protein-like (C1) and humic-like (C2, C3, C4). These components exhibit high similarity with fluorescence from nearby printing, domestic sewage, and aquaculture sources. Different fluorescence distributions were observed in Changdang Lake during different hydrological periods, particularly during high-flow periods when fluorescence intensity mainly concentrates at the downstream lake outlet. The fluorescence characteristics of Changdang Lake, with FI values ranging from 1.68 to 1.75, BIX values ranging from 0.92 to 0.93, and HIX values ranging from 0.56 to 0.7, suggest that endogenous sources predominantly drive DOM increment. Comprehensive analysis indicates that organic matter in Changdang Lake mainly originates from endogenous increments, such as the decomposition of aquatic plants and algae. Redundancy analysis reveals that environmental factors significantly correlated with lake DOM, including Chl-a and COD. This study contributes positively to addressing local ecological and environmental issues and provides valuable practical experience for studying other lake ecosystems.

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    HUAN Juan, ZHENG Yong-chun, XU Xian-gen, ZHANG Hao, YUAN Jia-long, LI Xin-cheng, ZHOU Li-wan. Characterization of DOM Sources and Distribution in Changdang Lake Based on 3D Fluorescence Combined With PARAFAC Approach[J]. Spectroscopy and Spectral Analysis, 2025, 45(2): 591

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    Paper Information

    Received: Dec. 1, 2023

    Accepted: May. 21, 2025

    Published Online: May. 21, 2025

    The Author Email: ZHOU Li-wan (Zlw5193@163.com)

    DOI:10.3964/j.issn.1000-0593(2025)02-0591-10

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