Time scale effect of magnetic ferric oxide modified biochar in-situ remediation of arsenic-contaminated paddy soil

Liang, Meina; Lu, Lin; Zhang, Qing; Li, Jiawei; Qiao, Mushi; Wu, Zimeng

doi:10.1016/j.eti.2024.103727

Environmental Technology & Innovation

2024

DOI: 10.1016/j.eti.2024.103727

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Time scale effect of magnetic ferric oxide modified biochar in-situ remediation of arsenic-contaminated paddy soil

Meina Liang,

Lin Lu,

Qing Zhang

et al.

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Cited by 2 publications

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Preparation of waste toner-derived magnetic adsorbent for analysis of lead in aqueous and oil-based foods

Qin,

Wang,

Wan

et al. 2025

Food Chemistry

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Preparation of waste toner-derived magnetic adsorbent for analysis of lead in aqueous and oil-based foods

Qin,

Wang,

Wan

et al. 2025

Food Chemistry

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Fe3O4/Mulberry Stem Biochar as a Potential Amendment for Highly Arsenic-Contaminated Paddy Soil Remediation

Tang,

Liang,

Ding

et al. 2024

Toxics

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Magnetite-loaded biochar has recently received attention owing to its ability to remove arsenic from contaminated soil. In this study, mulberry stem biochar (MBC) and Fe3O4-loaded mulberry stem biochar (Fe3O4@MBC) were produced and used in a 100-day incubation experiment to investigate their performance in the stabilization of arsenic in paddy soil severely polluted by the As (237.68 mg·kg−1) mechanism. Incubation experiments showed that Fe3O4@MBC was more effective in immobilizing As after incubation for 100 days. Moreover, adding Fe3O4@MBC facilitated the transformation of exchangeable heavy metals into organic-bound and residual forms, thereby reducing As available concentrations, mobility, and bioavailability in the soil, and elevating slightly the soil pH and dissolved organic carbon (DOC). The concentration of TCLP-extractable As (AsTCLP) in contaminated soil was reduced from 93.85 to 7.64 μg·L−1 within 10 d, below the safety limit for drinking water set by the World Health Organization (WHO). The characterization results of Fe3O4@MBC after incubation indicated that the mechanisms for As passivation are linked to redox reactions, complexation, electrostatic attraction, surface adsorption, and coprecipitation. Conclusively, Fe3O4@MBC is a promising amendment in highly As-contaminated soil and provides a theoretical reference in such polluted paddy soil remediation.

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Time scale effect of magnetic ferric oxide modified biochar in-situ remediation of arsenic-contaminated paddy soil

Cited by 2 publications

References 41 publications

Preparation of waste toner-derived magnetic adsorbent for analysis of lead in aqueous and oil-based foods

Preparation of waste toner-derived magnetic adsorbent for analysis of lead in aqueous and oil-based foods

Fe3O4/Mulberry Stem Biochar as a Potential Amendment for Highly Arsenic-Contaminated Paddy Soil Remediation

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