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Leachate derived humic-like substances drive the variation in microbial communities in landfill-affected groundwater.
Liu, Zhenhai; Sha, Haoqun; Zhu, Panpan; Zheng, Hongmei; Wang, Jianfei; He, Jun; Ma, Yan; An, Fengxia; Liu, Xueyu; Guo, Zheng.
Afiliação
  • Liu Z; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China; School of Chemical and Environmental Engineering, China Univers
  • Sha H; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China.
  • Zhu P; College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
  • Zheng H; HUAZE (Beijing) Ecological Environment Research Institute Co., Ltd., Beijing, 100071, China.
  • Wang J; HUAZE (Beijing) Ecological Environment Research Institute Co., Ltd., Beijing, 100071, China.
  • He J; HUAZE (Beijing) Ecological Environment Research Institute Co., Ltd., Beijing, 100071, China.
  • Ma Y; School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China.
  • An F; China Energy Science and Technology Research Institute Co. Ltd., Nanjing, 210023, China.
  • Liu X; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China. Electronic address: liuxueyu@craes.org.cn.
  • Guo Z; Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center (National Center for Space Weather), China Meteorological Administration, Beijing, 100081, China. Electronic address: guozheng@cma.gov.cn.
J Environ Manage ; 359: 121000, 2024 May.
Article em En | MEDLINE | ID: mdl-38669889
ABSTRACT
Landfills are commonly used for waste disposal in many countries, and pose a significant threat of groundwater contamination. Dissolved organic matter (DOM) plays a crucial role as a carbon and energy source, supporting the growth and activity of microorganisms. However, the changes in the DOM signature and microbial community composition in landfill-affected groundwater and their bidirectional relationships remain inadequately explored. Herein, we showed that DOM originating from more recent landfills mainly comprises microbially produced substances resembling tryptophan and tyrosine. Conversely, DOM originating from older landfills predominantly comprises fulvic-like and humic-like compounds. Leachate leakage increases microbial diversity and richness and facilitates the transfer of foreign bacteria from landfills to groundwater, thereby increasing the vulnerability of the microbial ecosystem in groundwater. Deterministic processes dominated the assembly of the groundwater microbial community, while stochastic processes accounted for an increased proportion of the microbial community in the old landfills. The dominant phyla observed in groundwater were Proteobacteria, Bacteroidota, and Actinobacteriota, and humic-like substances play a crucial role in driving the variation in microbial communities in landfill-affected groundwater. Predictions using PICRUSt2 suggested significant associations between various metabolic pathways and microbial communities, with the Kyoto Encyclopedia of Genes and Genomes pathway "Metabolism" being the most predominant. The findings contribute to advancing our understanding of the transformation of DOM and its interplay with microbial communities and can serve as a scientific reference for decision-making regarding groundwater pollution monitoring and remediation.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Água Subterrânea / Substâncias Húmicas Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Água Subterrânea / Substâncias Húmicas Idioma: En Ano de publicação: 2024 Tipo de documento: Article