Arsenic methylation behavior and microbial regulation mechanisms in landfill leachate saturated zones

Qian, Yating; Hu, Lifang; Wang, Yuqian; Xu, Ke

doi:10.1016/j.envpol.2023.121064

Cited by 5 publications

(2 citation statements)

References 53 publications

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“…The relatively lower retention of As by MD could be related to volatile organic arsenic, such as methylated arsenic in the landfill leachate concentrate, which penetrates through the hydrophobic membrane. 40 In particular, coagulation by the three chemicals reduced the rejection of As by MD. This result was unexpected and possibly due to the reduction and destruction of humic substances by coagulation prompting the release of As (Fig.…”

Section: Resultsmentioning

confidence: 98%

Comparison of different coagulants to improve membrane distillation performance for landfill leachate concentrate treatment

Xia,

Liu,

Cao

et al. 2023

Environ. Sci.: Water Res. Technol.

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Section: Resultsmentioning

confidence: 98%

Comparison of different coagulants to improve membrane distillation performance for landfill leachate concentrate treatment

Xia,

Liu,

Cao

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…The distribution of PTEs in soils surrounding MSW landfills is influenced by several factors, such as the type and amount of waste disposed [3], the age of the landfill [4], waste management (WM) practices [5], local conditions [6], and physicochemical factors [7]. In addition, the degradation of MSW in landfills and the management of leachate are critical issues that can lead to the release of PTEs into the environment, posing risks to nearby soils and water bodies [8][9][10][11][12]. Contamination of underlying soils and groundwater with PTEs can occur due to the lack of containment measures, particularly in older landfills that lack adequate liners and leachate collection systems [13,14].…”

Section: Introductionmentioning

confidence: 99%

Potentially toxic elements (PTEs) and ecological risk at waste disposal sites: An analysis of sanitary landfills

Podlasek,

Vaverková,

Jakimiuk

et al. 2024

PLoS ONE

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This study presents an analysis of soil contamination caused by Ni, Zn, Cd, Cu, and Pb at municipal solid waste (MSW) landfills, with a focus on ecological risk assessment. The approach aims to assess how different landfill practices and environmental conditions affect soil contamination with potentially toxic elements (PTEs) and associated environmental risks. Soil samples were collected from MSW landfills in Poland and the Czech Republic. The research included a comprehensive assessment of PTEs in soils in the context of global environmental regulations. The degree of soil contamination by PTEs was assessed using indices: Geoaccumulation Index (Igeo), Single Pollution Index (Pi), Nemerow Pollution Index (PN), and Load Capacity of a Pollutant (PLI). The ecological risk was determined using the Risk of PTEs (ERi) and Sum of Individual Potential Risk Factors (ERI). The maximum values of the indicators observed for the Radiowo landfill were as follows: Igeo = 4.04 for Cd, Pi = 24.80 for Cd, PN = 18.22 for Cd, PLI = 2.66, ERi = 744 for Cd, ERI = 771.80. The maximum values of the indicators observed for the Zdounky landfill were as follows: Igeo = 1.04 for Cu, Pi = 3.10 for Cu, PN = 2.52 for Cu, PLI = 0.27, ERi = 25 for Cd, ERI = 41.86. The soils of the tested landfills were considered to be non-saline, with electrical conductivity (EC) values less than 2,000 μS/cm. Varying levels of PTEs were observed, and geostatistical analysis highlighted hotspots indicating pollution sources. Elevated concentrations of Cd in the soil indicated potential ecological risks. Concentrations of Cu and lead Pb were well below the thresholds set by the environmental legislation in several countries. In addition, Ni concentrations in the soils of both landfills indicated that the average levels were within acceptable limits. Principal Component Analysis (PCA) revealed common sources of PTEs. The identification of specific risk points at the Radiowo and Zdounky sites contributes to a better understanding of potential hazards in landfill environments. By establishing buffer zones and implementing regular maintenance programs, emerging environmental problems can be addressed in a timely manner.

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Pathways and contributions of sulfate reducing-bacteria to arsenic cycling in landfills

Hu,

Huang,

Qian

et al. 2024

Journal of Hazardous Materials

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Arsenic methylation behavior and microbial regulation mechanisms in landfill leachate saturated zones

Cited by 5 publications

References 53 publications

Comparison of different coagulants to improve membrane distillation performance for landfill leachate concentrate treatment

Comparison of different coagulants to improve membrane distillation performance for landfill leachate concentrate treatment

Potentially toxic elements (PTEs) and ecological risk at waste disposal sites: An analysis of sanitary landfills

Pathways and contributions of sulfate reducing-bacteria to arsenic cycling in landfills

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