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Yang D, Fang W. Reduction of antimony bioavailability with the application of stable exogenous organic matter: a comparative study between rice straw and manure compost. ENVIRONMENTAL RESEARCH 2025; 277:121578. [PMID: 40216060 DOI: 10.1016/j.envres.2025.121578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2024] [Revised: 03/26/2025] [Accepted: 04/08/2025] [Indexed: 04/14/2025]
Abstract
Considering the widespread use of organic amendments to improve soil quality and enhance soil carbon sequestration, it is crucial to understand their impact on the bioavailability of metalloids in soils. Antimony (Sb), a priority pollutant, is particularly impacted by organic matter, yet the effects of different organic amendments-varying in stability and composition-on Sb bioavailability remain unclear. This study investigates the influence of different organic amendments, rice straw and compost, on Sb bioavailability in the rice-soil system, with rice ingestion being a major Sb exposure pathway in humans. Results show that while both amendments increased dissolved organic carbon in soil solution, their effects on Sb bioavailability differed markedly. Rice straw increased CDGT-SbIII by 13.24 %-66.63 %, whereas compost decreased CDGT-SbIII by 32.47 %-43.51 %. These differences were also reflected in Sb accumulation in rice shoots, where compost application resulted in lower Sb content. This reduction may be attributed to increased microbial genera such as Ramlibacter and Sphingomonas, which are associated with SbIII oxidation. Conversely, organic matter with low stability, prone to rapid degradation, could promote reducing soil conditions, thereby increasing SbIII concentrations. Our findings suggest that stable exogenous organic matter, such as pre-decomposed compost, is preferable for managing Sb-contaminated soils.
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Affiliation(s)
- Danxing Yang
- State Key Laboratory of Water Pollution Control and Green Resource Recycling, School of the Environment, Nanjing University, Jiangsu, 210023, China
| | - Wen Fang
- State Key Laboratory of Water Pollution Control and Green Resource Recycling, School of the Environment, Nanjing University, Jiangsu, 210023, China.
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Yang C, Xu Y, Yu T, Li Y, Zeng XC. Microbial reductive mobilization of As(V) in solid phase coupled with the oxidation of sulfur compounds: An overlooked biogeochemical reaction affecting the formation of arsenic-contaminated groundwater. JOURNAL OF HAZARDOUS MATERIALS 2025; 492:138234. [PMID: 40250270 DOI: 10.1016/j.jhazmat.2025.138234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2025] [Revised: 04/05/2025] [Accepted: 04/08/2025] [Indexed: 04/20/2025]
Abstract
Dissimilatory As(V)-respiring prokaryotes (DARPs) are recognized as having a crucial role in the formation of arsenic-contaminated groundwater. DARPs use small-molecule organic acids as electron donor to directly reduce As(V) in solid phase to more mobile As(III). Therefore, DARPs are considered to be heterotrophic bacteria. However, these cannot explain why high concentrations of As(III) are produced in environments lacking soluble organic carbon. We thus propose that reduced sulfur compounds may also be utilized by DARPs and affect the DARPs-mediated arsenic mobilization. This study sought to confirm this hypothesis. Metagenomic investigations on the DARP population derived from As-contaminated soil indicated that approximately 84 % of DARP MAGs possess the enzymes potentially catalyzing the oxidation of S2-, S0, SO32-, or S2O32-. Functional analysis of DARP population and a cultivable strain suggested that DARPs, in addition to small-molecule organic carbon, can effectively use sulfur compounds as electron donor to reduce As(V) to mobile As(III). Arsenic release experiments using DARP population and a cultivable DARP strain showed that DARPs indeed utilized sulfur compounds as the sole electron donors under autotrophic and anaerobic conditions to directly reduce adsorbed As(V) in the soils to mobile As(III). These findings provide new insights into the microbial mechanism responsible for the variation of As(III) concentrations in contaminated groundwater.
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Affiliation(s)
- Chengsheng Yang
- State Key Laboratory of Geomicrobiology and Environmental Changes & School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan, People's Republic of China
| | - Yifan Xu
- State Key Laboratory of Geomicrobiology and Environmental Changes & School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan, People's Republic of China
| | - Tingting Yu
- State Key Laboratory of Geomicrobiology and Environmental Changes & School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan, People's Republic of China
| | - Yang Li
- State Key Laboratory of Geomicrobiology and Environmental Changes & School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan, People's Republic of China
| | - Xian-Chun Zeng
- State Key Laboratory of Geomicrobiology and Environmental Changes & School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan, People's Republic of China.
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Wang Y, Tong D, Yu H, Zhou Y, Tang C, Dahlgren RA, Xu J. Viral involvement in microbial anaerobic methane oxidation-mediated arsenic mobilization in paddy soil. JOURNAL OF HAZARDOUS MATERIALS 2025; 484:136758. [PMID: 39644851 DOI: 10.1016/j.jhazmat.2024.136758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2024] [Revised: 11/28/2024] [Accepted: 12/02/2024] [Indexed: 12/09/2024]
Abstract
Anaerobic oxidation of methane (AOM) facilitates arsenic (As) mobilization, posing a significant environmental risk. Soil viruses potentially participate in the microbial AOM process, yet their roles in methane-mediated As mobilization of paddy soil remain elusive. Here, an anaerobic microcosm study was conducted by inoculating microbial suspension with extracellular free virus and mitomycin C (MC)-induced virus, along with 13CH4 injection. The results showed that extracellular free virus enhanced while MC-induced virus suppressed 13CH4-mediated As mobilization. During the AOM process, both viruses inhibited 13CH4 oxidation to 13CO2. However, the extracellular free virus suppressed whereas the MC-induced virus enhanced 13CH4 consumption, likely attributed to the viral influence on the ANME-2d abundance. The methane consumption differences were inferred to influence As reduction, as evidenced by a strong correlation between As(III) and 13CH4 consumption concentrations. Moreover, virus-mediated methane assimilation into microbial biomass carbon influenced the overall microbial population. An increased abundance of Geobacter in the extracellular free virus treatment elevated net As(III) concentrations (up to 260 %) relative to treatment without virus in the presence of 13CH4. In contrast, MC-induced virus led to a net 122 % reduction in As(III) concentration due to decreased Geobacter abundance. These findings provide new insights into soil viruses in microbial AOM-driven As mobilization, highlighting their crucial functions in soil ecosystems.
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Affiliation(s)
- Youjing Wang
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Di Tong
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Haodan Yu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Yujie Zhou
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Caixian Tang
- La Trobe Institute for Sustainable Agriculture and Food, Department of Animal, Plant & Soil Sciences, La Trobe University, Bundoora, VIC 3086, Australia
| | - Randy A Dahlgren
- Department of Land, Air and Water Resources, University of California, Davis, CA 95616, USA
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
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Zhang X, Zhang P, Wei X, Peng H, Hu L, Zhu X. Migration, transformation of arsenic, and pollution controlling strategies in paddy soil-rice system: A comprehensive review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 951:175500. [PMID: 39151637 DOI: 10.1016/j.scitotenv.2024.175500] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Revised: 08/03/2024] [Accepted: 08/12/2024] [Indexed: 08/19/2024]
Abstract
Arsenic pollution in paddy fields has become a public concern by seriously threatening rice growth, food security and human health. In this review, we delve into the biogeochemical behaviors of arsenic in paddy soil-rice system, systemically revealing the complexity of its migration and transformation processes, including the release of arsenic from soil to porewater, uptake and translocation of arsenic by rice plants, as well as transformation of arsenic species mediated by microorganism. Especially, microbial processes like reduction, oxidation and methylation of arsenic, and the coupling of arsenic with carbon, iron, sulfur, nitrogen cycling through microbes and related mechanisms were highlighted. Environmental factors like pH, redox potential, organic matter, minerals, nutrient elements, microorganisms and periphyton significantly influence these processes through different pathways, which are discussed in this review. Furthermore, the current progress in remediation strategies, including agricultural interventions, passivation, phytoremediation and microbial remediation is explored, and their potential and limitations are analyzed to address the gaps. This review offers comprehensive perspectives on the complicated behaviors of arsenic and influence factors in paddy soil-rice system, and provides a scientific basis for developing effective arsenic pollution control strategies.
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Affiliation(s)
- Xing Zhang
- Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Science, Northwest University, Xi'an 710127, China.
| | - Panli Zhang
- Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Science, Northwest University, Xi'an 710127, China
| | - Xin Wei
- Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Science, Northwest University, Xi'an 710127, China
| | - Hanyong Peng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Ligang Hu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xiaoli Zhu
- Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Science, Northwest University, Xi'an 710127, China.
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Yi S, Hang S, Li F, Zhu L, Li F, Zhong S, Wu C, Ge F, Ji X, Tian J, Wu Y. Hydroxamate Siderophores Intensify the Co-Deposition of Cadmium and Silicon as Phytolith-Like Particulates in Rice Stem Nodes: A Natural Strategy to Mitigate Grain Cadmium Accumulation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:23747-23757. [PMID: 39377800 DOI: 10.1021/acs.jafc.4c07183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/09/2024]
Abstract
Sequestration of cadmium (Cd) in rice phytolith can effectively restrict its migration to the grains, but how hydroxamate siderophore (HDS) affects phytolith formation within rice plants especially the fate of Cd and silicon (Si) remains poorly understood. Here, we found that the addition of HDS increased the content of dissolved Si and Cd in soil pore water as well as its absorption by the rice roots during the reproductive growth stage. HDS effectively trapped orthosilicic acid and Cd ions at the third stem nodes of rice plants via hydrogen bonds and chelation interactions, which then rapidly deposited on the xylem cell wall through hydrophobic interactions. Ultimately, Cd was immobilized as phytolith-like particulates in the form of CdSiO3. Field experiments verified that Cd accumulation was significantly reduced by 46.4% in rice grains but increased by 41.2% in rice stems after HDS addition. Overall, this study advances our understanding of microbial metabolites enhancing the instinctive physiological barriers within rice plants.
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Affiliation(s)
- Shengwei Yi
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental and Ecological Health, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental Behavior and Control Principle of New Pollutants, Xiangtan University, Xiangtan 411105, China
| | - Sicheng Hang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental and Ecological Health, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental Behavior and Control Principle of New Pollutants, Xiangtan University, Xiangtan 411105, China
| | - Feng Li
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental and Ecological Health, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental Behavior and Control Principle of New Pollutants, Xiangtan University, Xiangtan 411105, China
| | - Lizhong Zhu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Fangbai Li
- Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Songxiong Zhong
- Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Chen Wu
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental and Ecological Health, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental Behavior and Control Principle of New Pollutants, Xiangtan University, Xiangtan 411105, China
| | - Fei Ge
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental and Ecological Health, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental Behavior and Control Principle of New Pollutants, Xiangtan University, Xiangtan 411105, China
| | - Xionghui Ji
- Hunan Institute of Agro-Environment and Ecology, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Jiang Tian
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental and Ecological Health, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental Behavior and Control Principle of New Pollutants, Xiangtan University, Xiangtan 411105, China
| | - Yujun Wu
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental and Ecological Health, Xiangtan University, Xiangtan 411105, China
- Hunan Provincial University Key Laboratory for Environmental Behavior and Control Principle of New Pollutants, Xiangtan University, Xiangtan 411105, China
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