Vertical distribution of the toxic metal(loid)s chemical fraction and microbial community in waste heap at a nonferrous metal mining site

Guo, Ziwen; Yang, Jianhong; Sarkodie, Emmanuel Konadu; Li, Kewei; Deng, Yan; Meng, Delong; Miao, Bo; Liu, Hongwei; Liang, Yili; Yin, Huaqun; Liu, Xueduan; Jiang, Luhua

doi:10.1016/j.ecoenv.2021.113037

Cited by 13 publications

(2 citation statements)

References 72 publications

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“…In this study, a modified BCR sequential extraction procedure ( Figure 3 ) was used to obtain the chemical fractions of PTEs, which are more essential parameters in the sediments than the total contents in terms of their bioavailability, potential sources, and environmental behaviors [ 59 , 60 ]. As shown in Table S2 , the overall sum of four fractions was in good agreement with direct pseudo-total contents, and the recoveries ranged from 92.3% to 123.0%, indicating the modified BCR method was reliable.…”

Section: Resultsmentioning

confidence: 99%

Spatial Distributions and Intrinsic Influence Analysis of Cr, Ni, Cu, Zn, As, Cd and Pb in Sediments from the Wuliangsuhai Wetland, China

Zhang

Liang

Liu

et al. 2022

IJERPH

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The spatial distributions of Cr, Ni, Cu, Zn, As, Cd and Pb (potentially toxic elements, PTEs) in sediments and intrinsic influence factors from the Wuliangsuhai wetland of the Hetao Irrigation District, China were studied in this work. The results showed that excluding Zn, the total contents of other PTEs were higher than the background values, of which As (39.26 mg·kg−1) and Cd (0.44 mg·kg−1) were six-fold and seven-fold higher, respectively. Especially, the high levels of Cd (70.17%), Pb (66.53%), and Zn (57.20%) in the non-residual fraction showed high bioavailability and mobility. It indicated that PTEs can enter the food chain more easily and produce much toxicity. Based on Igeo, ICF, and MRI, the contamination of As was the most serious in the middle areas (MDP) of the wetland, and its risk was up to moderately strong. Cd and Pb posed moderate and considerate risk, respectively. Furthermore, 29.50% and 55.54% risk contribution ratio of As and Cd, respectively, showed that they were the dominant contaminants. In addition, the positive correlation between sand, OM, and total contents and chemical fractions of PTEs by using PCM, RDA, and DHCA indicated that physicochemical properties could significantly influence the spatial distributions of PTEs. The work was useful for assessing the level of pollution in the study area and acquiring information for future and possible monitoring and remediation activities.

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Section: Resultsmentioning

confidence: 99%

Spatial Distributions and Intrinsic Influence Analysis of Cr, Ni, Cu, Zn, As, Cd and Pb in Sediments from the Wuliangsuhai Wetland, China

Zhang

Liang

Liu

et al. 2022

IJERPH

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“…The co-presence of both sulfur oxidization and As(V) reduction genes in retrieved Sulfuricella- and Ramlibacter -associated MAGs suggested their potential for coupling sulfur oxidation with As(V) reduction. These three genera are known sulfur oxidizers that frequently thrive in environments with active sulfur cycles, such as salt lakes, groundwater, and mine tailings [ 70–74 ]. The capability for As(V) reduction has been confirmed in a Sulfuritalea isolate [ 75 ].…”

Section: Discussionmentioning

confidence: 99%

Microbially mediated sulfur oxidation coupled with arsenate reduction within oligotrophic mining–impacted habitats

Sun,

Chen,

Häggblom

et al. 2024

The ISME Journal

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Arsenate reduction is a major cause of As release from soils which threatens more than 200 million people worldwide. While heterotrophic As(V) reduction has been investigated extensively, the mechanism of chemolithotrophic As(V) reduction is less studied. Since As is frequently found as sulfidic minerals in the environment, microbial mediated sulfur oxidation coupled to As(V) reduction (SOAsR), a chemolithotrophic process, may be more favorable in oligotrophic mining-impacted sites (e.g., As-contaminated mine tailings). While SOAsR is thermodynamically favorable, knowledge regarding this biogeochemical process is still limited. The current study suggested that SOAsR was a more prevalent process compared to heterotrophic As(V) reduction in oligotrophic sites, such as mine tailings. The water-soluble reduced sulfur concentration was predicted as one of the major geochemical parameters that substantially impacted SOAsR potentials. A combination of DNA-SIP and metagenome binning revealed members of the genera Sulfuricella, Ramlibacter, and Sulfuritalea as sulfur oxidizing As(V)-reducing bacteria (SOAsRB) in mine tailings. Genome mining further expanded the list of potential SOAsRBs to diverse phylogenetic lineages such as members associated with Burkholderiaceae and Rhodocyclaceae. Metagenome analysis using multiple tailing samples across southern China confirmed that the putative SOAsRB were the dominant As(V) reducers in these sites. Together, the current findings expand our knowledge regarding the chemolithotrophic As(V) reduction process, which may be harnessed to facilitate future remediation practices in mine tailings.

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Transport Behavior of Cd2+ in Highly Weathered Acidic Soils and Shaping in Soil Microbial Community Structure

Shi,

Jiang,

Yang

et al. 2023

Arch Environ Contam Toxicol

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Vertical distribution of the toxic metal(loid)s chemical fraction and microbial community in waste heap at a nonferrous metal mining site

Cited by 13 publications

References 72 publications

Spatial Distributions and Intrinsic Influence Analysis of Cr, Ni, Cu, Zn, As, Cd and Pb in Sediments from the Wuliangsuhai Wetland, China

Spatial Distributions and Intrinsic Influence Analysis of Cr, Ni, Cu, Zn, As, Cd and Pb in Sediments from the Wuliangsuhai Wetland, China

Microbially mediated sulfur oxidation coupled with arsenate reduction within oligotrophic mining–impacted habitats

Transport Behavior of Cd2+ in Highly Weathered Acidic Soils and Shaping in Soil Microbial Community Structure

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