Remediation of Cadmium‐Contaminated Paddy Soils by Phosphorite Magnetic Biochar: A New Insight Into Soil Microbial Responses

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

ABSTRACT Cadmium (Cd)‐contaminated rice paddies have been a primary environmental concern worldwide. Biochar or modified biochar application favors reducing Cd availability in paddy soil, which has demonstrated physical and chemical terms. However, we know little about soil microbial responses after application. In this study, revealed the immobilization effect mechanism of fields by novel phosphorite magnetic (PMCB) from perspective response. The results suggested that PMCB facilitated conversion highly active to less reduced uptake improving physicochemical properties functional bacterial gene abundance. Compared with control, acetic acid extractable reducible contents content brown decreased 7.4%–18.4%, 16.2%–19.9%, 44.0%–47.9%, respectively, residual increased 16.3%–25.8% under treatment. A decrease sqr fccB abundances (downregulated 6.3% 12.4%, respectively) inhibited CdS oxidative dissolution 0.2% Conversely, other treatments stimulated abundant proliferation microbes (e.g., Anaeromyxobacter , Geobacter Thiobacillus ) these genes while suppressing sulfide‐producing abundance (sreA phsA 30.5%–73.4% 3.3%–11.3%, respectively). This result implies Fe(III) mineral reduction oxidation lead limited secondary release Cd. Additionally, aqueous‐phase analysis immobilized mainly coprecipitation PO 4 3− CO 3 2− (34.5%) ion exchange (32.2%), followed surface complexation (18.7%) cation π‐bonding (13.1%).

Language: Английский

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Remediation of cadmium and arsenic co-contaminated soil by using Fe-enhanced Ca/Mn-based composite materials: Field applications and stabilization mechanisms

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 115678 - 115678

Published: Feb. 1, 2025

Language: Английский

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A review on As-contaminated soil remediation using waste biomass feedstock-based biochar and metal-modified biochar

Ecotoxicology and Environmental Safety, Journal Year: 2025, Volume and Issue: 292, P. 117927 - 117927

Published: March 1, 2025

Arsenic (As) is a carcinogen that threatens ecosystems and human health. Due to its high adsorption, microporosity, biochar widely available for soil remediation. This review significantly summarizes the current status of waste biomass feedstock-based metal-modified As-contaminated Firstly, this paper briefly describes sources hazards As in soil, secondly, lists eleven feedstocks preparing biochar. Agricultural, domestic, forestry wastes provide plentiful source preparation. Single or multi-metal modifications such as iron (Fe), manganese (Mn), cerium (Ce) can effectively improve Arsenite [As(III)] arsenate [As(V)] adsorption capacity The primary mechanisms removal by include ion exchange, electrostatic attraction, surface complexation, redox transformation, H-bond formation. In conclusion, presents an in-depth discussion on both metal modification, providing constructive suggestions future development remediate soil.

Language: Английский

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Meta-analysis of the fate and transformation of heavy metals during pyrolysis process via data-mining the literature and machine learning

Journal of Analytical and Applied Pyrolysis, Journal Year: 2025, Volume and Issue: unknown, P. 107169 - 107169

Published: May 1, 2025

Language: Английский

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Remediation of antimony and arsenic in co-contaminated soil by electrolytic manganese residue-biochar composite: Effects, mechanisms, and microbial response

Environmental Pollution, Journal Year: 2024, Volume and Issue: unknown, P. 125371 - 125371

Published: Nov. 1, 2024

Language: Английский

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Effect of soil-groundwater system on migration and transformation of organochlorine pesticides: A review

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 290, P. 117564 - 117564

Published: Dec. 18, 2024

Language: Английский

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Adapting Seasonal Rice Cultivation Strategies for Food Security in Response to Climate Change Impacts

Sustainability, Journal Year: 2024, Volume and Issue: 16(16), P. 6748 - 6748

Published: Aug. 7, 2024

An in-depth examination of the effects climate change on rice yield in China, encompassing various types, is crucial for ensuring nation’s food security. This study develops an “economy-climate” theoretical model and employs Panel Corrected Standard Error Estimation (PCSE) panel data spanning from 1978 to 2018, sourced China’s primary grain-producing regions. The analysis delves into impact variables, including precipitation, temperature, sunshine duration, overall production different types. Overall, findings reveal a nonlinear relationship between yield, characterized by “inverted U-shaped” pattern. However, significant variations exist types across main areas. Increasing precipitation generally enhances early provinces also augments mid-season one-season-late Inner Mongolia Autonomous Region, Hebei, Jilin, Heilongjiang, Shandong Province. Conversely, it reduces output Liaoning, Jiangsu, Anhui, Jiangxi, Henan, Hubei, Hunan. Sichuan Province sees rise temperature favoring double-season-late production, unlike other provinces. For rice, increases benefit Heilongjiang but not Additionally, prolonged duration boosts all does have same effect

Language: Английский

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Efficient mineralization of cadmium and arsenic by poorly crystalline CaFe-layered double hydroxide in soil: performance and mechanism

Environmental Research, Journal Year: 2024, Volume and Issue: unknown, P. 119994 - 119994

Published: Sept. 1, 2024

Language: Английский

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