High-efficiency remediation of Hg and Cd co-contaminated paddy soils by Fe–Mn oxide modified biochar and its microbial community responses

Biochar, Journal Year: 2024, Volume and Issue: 6(1)

Published: June 5, 2024

Abstract Fe–Mn oxide modified biochar (FMBC) was produced to explore its potential for remediation of Hg–Cd contaminated paddy soils. The results showed that the application FMBC decreased contents bioavailable Hg and Cd by 41.49–81.85% 19.47–33.02% in contrast CK, while amount labile organic carbon (C) fractions C-pool management index (CPMI) increased under BC treated soils, indicating enhancement soil C storage nutrient cycling function. Dry weight different parts Oryza sativa L. enhanced after addition FMBC, Fe Mn root iron–manganese plaques (IMP) were 1.46–2.06 6.72–19.35 times higher than those control groups. brown rice treatments significantly reduced 18.32–71.16% 59.52–72.11% compared with control. altered composition metabolism function bacterial communities, especially increasing abundance keystone phyla, including Firmicutes , Proteobacteria Actinobacteria. Partial least squares path modelling (PLSPM) revealed Na 2 S O 3 –Hg, DTPA–Cd IMP key indicators affecting accumulation grains. These demonstrate simultaneous value combined pollution restoring fertility biological productivity. Graphical

Language: Английский

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High performance self-assembled sulfidized nanoscale zero-valent iron for the immobilization of cadmium in contaminated sediments: Optimization, microbial response, and mechanisms

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 469, P. 134022 - 134022

Published: March 12, 2024

Language: Английский

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Ferric Oxide Nanomaterials and Plant-Rhizobacteria Symbionts Cogenerate Iron Plaque for Removing Highly Chlorinated Contaminants in Dryland Soils

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(25), P. 11063 - 11073

Published: June 13, 2024

Rhizosphere iron plaques derived from Fe-based nanomaterials (NMs) are a promising tool for sustainable agriculture. However, the requirement flooded conditions to generate plaque limits scope of NM application. In this study, we achieved in situ Fenton oxidation highly chlorinated persistent organic pollutant (2,2′,4,5,5′-pentachlorobiphenyl, PCB101) through mediated by interaction between α-Fe2O3 NMs and plant-rhizobacteria symbionts under dryland conditions. Mechanistically, coexistence Pseudomonas chlororaphis JD37 stimulated alfalfa roots secrete acidic reductive agents as well H2O2, which together rhizosphere reaction converted into rich Fe(II)-silicate. Further verifications reproduced vitro using compounds, confirming critical role •OH oxidative degradation PCB101. Significant reductions PCB101 content 18.6%, 42.9%, 23.2% were respectively found stem, leaf, soil after 120-d treatment, proving effectiveness NMs-plant-rhizobacteria technique simultaneously safe crop production remediation. These findings can help expand potential applications nanobio its generation both agricultural practice

Language: Английский

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Innovative Nanoremediation Techniques for Soil Contamination: Exploring Metal Based Nanomaterial Approaches – a Review

Soil and Sediment Contamination An International Journal, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 69

Published: April 1, 2025

Language: Английский

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Reduction and immobilization of Cd(II) and As(III) using sulfur-ferrihydrite-biochar as an amendment in water and soil: Investigation of the Mechanism of Remediation

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

The transformation behaviors of arsenic (As) and cadmium (Cd) in contaminated soils are generally complex process due to their distinct chemical physical characteristics, which poses challenge for remediation. This study proposes an efficient strategy the simultaneous immobilization Cd As using sulfur-ferrihydrite-modified biochar (SFB) as organic amendment. A series experiments, including batch pot was conducted under controlled conditions. results showed that maximum sorption capacities by SFB were 76.69 mg kg^-1 8.28 kg^-1, respectively, significantly higher than those (BC), ferrihydrite (FH) ferrihydrite-biochar (FB). capacity is attributed synergistic interactions between ferrihydrite. follows Langmuir isothermal model pseudo-second-order kinetic model, indicating a combination chemisorption mechanisms. removal mechanisms primarily involve precipitation, oxidation complexation, while mainly include ion exchange, electrostatic sorption. Application reduced bioavailable forms soil, shifting toward more stable residual states enhancing immobilization. Overall, novel effective adsorbent immobilizing agricultural soils, promoting safer crops production field.

Language: Английский

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Humic Acid-Supported Nanoscale Zero-Valent Iron for Sustainable Cadmium Remediation and Crop Safety in Farmland Soil

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 492, P. 138109 - 138109

Published: April 2, 2025

Language: Английский

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Remediation of antimony-arsenic co-contaminated soils in mining areas: Synergistic interaction of amendments and plants affects soil Sb and As bioavailability, nutrient and enzyme activity

Environmental Technology & Innovation, Journal Year: 2025, Volume and Issue: unknown, P. 104185 - 104185

Published: April 1, 2025

Language: Английский

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Milk vetch returning combined with lime materials alleviates soil cadmium contamination and improves rice quality in soil-rice system

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 951, P. 175770 - 175770

Published: Aug. 30, 2024

Language: Английский

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Role of Fe-based nanoparticles introduced into soil–plant systems or contaminated soil–plant systems: toxic substance or remediation agent?

Frontiers of Environmental Science & Engineering, Journal Year: 2024, Volume and Issue: 19(3)

Published: Dec. 12, 2024

Language: Английский

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