Coupled Aerobic Methane Oxidation and Arsenate Reduction Contributes to Soil-Arsenic Mobilization in Agricultural Fields DOI
Ling-Dong Shi, Yujie Zhou, Xianjin Tang

et al.

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(16), P. 11845 - 11856

Published: Aug. 3, 2022

Microbial oxidation of organic compounds can promote arsenic release by reducing soil-associated arsenate to the more mobile form arsenite. While anaerobic methane has been demonstrated reduce arsenate, it remains elusive whether and what extent aerobic (aeMO) contribute reductive mobilization. To fill this knowledge gap, we performed incubations both microbial laboratory cultures soil samples from arsenic-contaminated agricultural fields in China. Incubations with showed that aeMO could couple reduction, wherein former bioprocess was carried out methanotrophs latter a non-methanotrophic bacterium belonging novel uncultivated representative Burkholderiaceae. Metagenomic analyses combined metabolite measurements suggested formate served as interspecies electron carrier linking reduction. Such coupled bioprocesses also take place real world, supported similar stoichiometry gene activity natural paddy soils, up 76.2% soil-arsenic mobilization into pore waters top layer soils where oxygen present. Overall, study reveals previously overlooked yet significant contribution

Language: Английский

An evolving view on biogeochemical cycling of iron DOI
Andreas Kappler, Casey Bryce, Muammar Mansor

et al.

Nature Reviews Microbiology, Journal Year: 2021, Volume and Issue: 19(6), P. 360 - 374

Published: Feb. 1, 2021

Language: Английский

Citations

572
Iron plaque formation and its effect on key elements cycling in constructed wetlands: Functions and outlooks DOI

Yuanyuan Fan,

Shanshan Sun, Shengbing He

et al.

Water Research, Journal Year: 2023, Volume and Issue: 235, P. 119837 - 119837

Published: March 6, 2023

Language: Английский

Citations

54
Active Iron Phases Regulate the Abiotic Transformation of Organic Carbon during Redox Fluctuation Cycles of Paddy Soil DOI
Ning Chen, Qing‐Long Fu, Tongliang Wu

et al.

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(20), P. 14281 - 14293

Published: Oct. 8, 2021

Iron (Fe) phases are tightly linked to the preservation rather than loss of organic carbon (OC) in soil; however, during redox fluctuations, OC may be lost due Fe phase-mediated abiotic processes. This study examined role driving hydroxyl radical (•OH) formation and transformation cycles paddy soils. Chemical probes, sequential extraction, Mössbauer analyses showed that active species, such as exchangeable surface-bound low-crystalline minerals (e.g., green rust-like phases), predominantly regulated •OH cycles. The oxidation strongly induced oxidative OC, which accounted for 15.1–30.8% CO2 production oxygenation. Microbial processes contributed 7.3–12.1% production, estimated by chemical quenching γ-irradiation experiments. After five cycles, 30.1–71.9% associated with species was released, whereas 5.2–7.1% stabilized high-crystalline irreversible these Collectively, our findings might unveil under-appreciated more conservation soil fluctuation events.

Language: Английский

Citations

102
Unraveling influences of nitrogen cycling on arsenic enrichment in groundwater from the Hetao Basin using geochemical and multi-isotopic approaches DOI
Zhipeng Gao,

Haicheng Weng,

Huaming Guo

et al.

Journal of Hydrology, Journal Year: 2021, Volume and Issue: 595, P. 125981 - 125981

Published: Jan. 19, 2021

Language: Английский

Citations

80
Unraveling roles of dissolved organic matter in high arsenic groundwater based on molecular and optical signatures DOI

Wen Qiao,

Huaming Guo, Chen He

et al.

Journal of Hazardous Materials, Journal Year: 2020, Volume and Issue: 406, P. 124702 - 124702

Published: Nov. 28, 2020

Language: Английский

Citations

72
Autotrophic denitrification using Fe(II) as an electron donor: A novel prospective denitrification process DOI

Yaning Wang,

Shuang Ren,

Peng Wang

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 858, P. 159721 - 159721

Published: Oct. 25, 2022

Language: Английский

Citations

51
Dissolved Organic Matter Sources in High Arsenic Groundwater From a Sand‐Gravel Confined Aquifer DOI
Zhipeng Gao, Huaming Guo,

Wen Qiao

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2023, Volume and Issue: 128(2)

Published: Feb. 1, 2023

Abstract Sources of dissolved organic matter (DOM) triggering arsenic enrichment in deep confined groundwater is a highly debated issue. Along these lines, the spectroscopic and molecular characteristics DOM were monitored both shallow unconfined from Songnen Basin, China. Results demonstrated that with higher concentrations was characterized by more abundant labile compounds than groundwater. The three‐end‐member mixing model estimated had fraction surface water, while primarily recharged lateral flow. Groundwater sources fluorescence index (FI) values, which suggests sourced water stronger terrestrial signatures. However, mainly situ sedimentary release or by‐products microbial activity Higher values degradation (I_deg) indicate undergone greater extents one. anoxic environments occurred via pathway where saturated low‐molecular‐mass preferentially degraded to produce mid‐molecular‐mass unsaturated, aromatic, This explained significant positive correlations between FI I_deg values. A state conducive work successfully identified distinct DOM, proposed paradigm processing pathways during under environments.

Language: Английский

Citations

25
The interplay between microalgae and toxic metal(loid)s: mechanisms and implications in AMD phycoremediation coupled with Fe/Mn mineralization DOI

Daijie Chen,

Guobao Wang,

Chiyu Chen

et al.

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 454, P. 131498 - 131498

Published: April 26, 2023

Language: Английский

Citations

24
High arsenic pollution of the eutrophic Lake Taihu and its relationship with iron, manganese, and dissolved organic matter: High-resolution synchronous analysis DOI

Wenming Yan,

Xiangyu He,

Musong Chen

et al.

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 467, P. 133644 - 133644

Published: Jan. 29, 2024

Language: Английский

Citations

15
Ammonium-Enhanced Arsenic Mobilization from Aquifer Sediments DOI
Wei Xiu,

Ruixuan Gai,

Songze Chen

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 5, 2024

Ammonium-related pathways are important for groundwater arsenic (As) enrichment, especially via microbial Fe(III) reduction coupled with anaerobic ammonium oxidation; however, the key (and microorganisms) underpinning ammonium-induced and their contributions to As mobilization in still unknown. To address this gap, aquifer sediments hosting high from western Hetao Basin were incubated 15N-labeled external organic carbon sources (including glucose, lactate, lactate/acetate). Decreases concentrations positively correlated increases total produced Fe(II) (Fe(II)tot) released As. The molar ratios of Fe(II)tot oxidized ranged 3.1 3.7 all incubations, δ15N values N2 headspace increased ammonium-treated series, suggesting as end product oxidation. addition release by 16.1% 49.6%, which was more pronounced when copresented electron donors. Genome-resolved metagenomic analyses (326 good-quality MAGs) suggested that system required syntrophic metabolic interactions between bacterial archaeal current results highlight significance ammonium-stimulated driving mobilization, is underestimated groundwater.

Language: Английский

Citations

11