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Characterization and spatiotemporal variations of fluorescent dissolved organic matter in leachate from old landfill-derived incineration residues and incombustible waste

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  • Thi Ngoc Nguyen
  • Taketoshi Kusakabe
  • Masaki Takaoka

Abstract

Dissolved organic matter (DOM) influences the bioavailability and behavior of trace metals and other pollutants in landfill leachate. This research characterized fluorescent dissolved organic matter (FDOM) in leachate from an old landfill in Japan during a 13-month investigation. We employed excitation–emission matrix (EEM) fluorescence spectroscopy with parallel factor analysis (PARAFAC) to deconvolute the FDOM complex mixture into three fluorophores: microbial humic-like (C1), terrestrial humic-like (C2), and tryptophan-like fluorophores (C3). These FDOM components were compared with findings from other studies of leachate in landfills with different waste compositions. The correlations among EEM-PARAFAC components, dissolved organic carbon (DOC) concentration, and ultraviolet–visible and fluorescence indices were evaluated. The FDOM in leachate varied spatially among old and extended leachate collected in the landfill and leachate treatment facility. The FDOM changed temporally and decreased markedly in August 2019, November 2019, and April 2020. The strong positive correlation between HIX and %C2 (r = 0.87, ρ = 0.91, p 0.72, ρ > 0.78, p 0.41, p

Suggested Citation

  • Thi Ngoc Nguyen & Taketoshi Kusakabe & Masaki Takaoka, 2024. "Characterization and spatiotemporal variations of fluorescent dissolved organic matter in leachate from old landfill-derived incineration residues and incombustible waste," PLOS ONE, Public Library of Science, vol. 19(6), pages 1-18, June.
    • Handle: RePEc:plo:pone00:0304188
    DOI: 10.1371/journal.pone.0304188
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    References listed on IDEAS

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    1. Mengyu Liu & Haihan Tian & Tao Chen & Jingyao Sun & Ruipeng Sun & Qiang Kong & Zheng Zhao & Siju Zhang & Fei Xu, 2023. "Spatiotemporal evolution of dissolved organic matter (DOM) and its response to environmental factors and human activities," PLOS ONE, Public Library of Science, vol. 18(10), pages 1-16, October.
    2. Yanan Wen & Min Xiao & Zhaochuan Chen & Wenxi Zhang & Fujun Yue, 2023. "Seasonal Variations of Dissolved Organic Matter in Urban Rivers of Northern China," Land, MDPI, vol. 12(2), pages 1-18, January.
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