Enhanced As(III) removal from aqueous solution by Fe-Mn-La-impregnated biochar composites
Abstract
A novel Fe-Mn-La-impregnated biochar composite (FMLBC) was synthesized using an impregnation method for efficient As (III) adsorption. The pseudo-second-order model (R 2 values are 0.996, 0.996, and 0.994 for different FMLBC rate used) better fitted the kinetic adsorption of arsenic (As) on the FMLBC than the pseudo-first order model (R 2 values are 0.978, 0.971, and 0.991 respectively). The SEM-EDS, FTIR and XPS results confirmed the addition of Fe, Mn and La into the BC structure. Compared with pristine biochar (3.73 mg g-1) and Fe-Mn-impregnated biochar (9.48 mg g-1), the As (III) adsorption capacity of Fe-Mn-La impregnated biochar (14.9 mg g-1) was significantly improved. The presence of NO 3- and SO 42- did not influence As adsorption, whereas PO 43- influenced As removal. The mechanism of As adsorption on the FMLBC involved oxidization, electrostatic attraction, ligand exchange, and formation of an inner-sphere R-O-As complex. Among them, the electrostatic attraction and inner-sphere complexation contributed the most. The simple preparation process and high adsorption performance suggest that the FMLBC could be served as a promising adsorbent for As (III) removal from aqueous solution.
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In present manganese-, cobalt-, or some bimetallic-biochar researches, metal centres were deployed merely as Lewis basic sites or electron donors during electron-mediated processes.
“For the present manganese-, cobalt-, or some bimetallic-biochar researches, the metal centres were deployed merely as Lewis basic sites or electron donors during the electron-mediated processes, and redox recycling potential were still poorly optimized.64,[142][143][144][145][146][147]”
From Sustainable remediation with an electroactive biochar system: mechanisms and perspectives (2020) · cites this paper as [143]
In present manganese-, cobalt-, or some bimetallic-biochar researches, redox recycling potential was still poorly optimized.
“For the present manganese-, cobalt-, or some bimetallic-biochar researches, the metal centres were deployed merely as Lewis basic sites or electron donors during the electron-mediated processes, and redox recycling potential were still poorly optimized.64,[142][143][144][145][146][147]”
From Sustainable remediation with an electroactive biochar system: mechanisms and perspectives (2020) · cites this paper as [143]
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Self-citation
- Authors
- Lin, L., Song, Z., Khan, Z. H., Liu, X., & Qiu, W.
- Affiliations
- Agro-Environmental Protection Institute (CN)
- Plant & Food Research (NZ)
- Corresponding author
- Song, Zhengguo
- Venue
- Science of The Total Environment
- Publisher
- Elsevier BV
- Published
- 2019-10
- Volume
- 686
- Pages
- 1185-1193
- ISSN
- 0048-9697 (ISSN-L)
- OpenAlex
- W2948906198
- Cited by
- 134
- References
- 50
- Citations by year
- 2026: 19 · 2025: 18 · 2024: 17 · 2023: 19 · 2022: 23 · 2021: 21 · 2020: 17
- FWCI
- 6.64
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Science of The Total Environment (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Arsenic contamination and mitigation
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Keywords
- arsenic removal, As(III) adsorption, biochar composites, adsorption kinetics, pseudo-second-order kinetics, phosphate interference, inner-sphere complexation, electrostatic attraction, ligand exchange, arsenic oxidation, water treatment adsorbents
- MeSH terms
- Adsorption, Arsenic, Charcoal, Iron, Lanthanum, Manganese, Waste Disposal, Fluid, Water Pollutants, Chemical
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