Enhanced adsorption for Pb(II) and Cd(II) of magnetic rice husk biochar by KMnO4 modification
Abstract
Novel KMnO 4-treated magnetic biochar (FMBC) was successfully synthesized by addition of Fe(NO 3)3 during carbonization and KMnO 4 treatment following for Pb(II) and Cd(II) adsorption. SEM-EDS, XPS, and ICP-AES were used to evaluate the FMBC and magnetic biochar (FBC) on surface morphology, surface chemistry characteristics, surface functional groups, and Pb(II) and Cd(II) adsorption behavior. Results showed that the Langmuir maximum adsorption quantity of FMBC reached 148 mg/g for Pb(II) and 79 mg/g for Cd(II), nearly 7 times of that of FBC. The enhancement of FMBC for heavy metal adsorption was due to the successful load of manganese oxides and the increased oxygen functional groups consistent with XPS and FTIR results. The adsorption capacities of FMBC were maintained over 95% when the pH value was higher than 2.5 and 3.5 for Pb(II) and Cd(II), respectively. The adsorption performances of both heavy metals by FMBC were hardly influenced by ionic strength and humid acid. The adsorption capacities of FMBC could maintain over 50% and 87% after four cycles for Pb(II) and Cd(II), respectively. The saturation magnetization of FMBC was about 11.5 emu/g, which did not change after adsorption. This work proposed a new method to fabricate a magnetic biochar with high adsorption capacities of heavy metals Pb(II) and Cd(II).
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Pb2+ begins to precipitate at solution pH greater than 5.8.
“Considering that Pb2+ generates precipitation, Pb2+ begins to precipitate to a pH of solution greater than 5.8 [57].”
From Effect of CeO2-Reinforcement on Pb Absorption by Coconut Coir-Derived Magnetic Biochar (2023) · cites this paper as [57]
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Effect of CeO2-Reinforcement on Pb Absorption by Coconut Coir-Derived Magnetic Biochar
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- Authors
- Sun, C., Chen, T., Huang, Q., Wang, J., Lu, S., & Yan, J.
- Affiliations
- State Key Laboratory of Clean Energy Utilization (CN)
- Everbright International (China) (CN)
- Corresponding author
- Chen, Tong
- Venue
- Environmental Science and Pollution Research
- Published
- 2019-02-04
- Volume
- 26
- Issue
- 9
- Pages
- 8902-8913
- ISSN
- 0944-1344 (ISSN-L)
- 1614-7499
- OpenAlex
- W2911790446
- Cited by
- 193
- References
- 4
- Citations by year
- 2026: 13 · 2025: 26 · 2024: 33 · 2023: 36 · 2022: 31 · 2021: 30 · 2020: 16 · 2019: 8
- FWCI
- 7.68
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Environmental Science and Pollution Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- The National Key Research and Development Program of China (2016YFD0801104)
- the Fundamental Research Funds for the Central Universities (No. 2016XZZX002-02)
- National Natural Science Foundation of China (No. 51621005)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Keywords
- magnetic biochar, rice husk biochar, potassium permanganate modification, lead adsorption, cadmium adsorption, heavy metal removal, manganese oxide, oxygen-containing functional groups, adsorption capacity, adsorbent reusability, saturation magnetization
- MeSH terms
- Adsorption, Cadmium, Charcoal, Lead, Magnetics, Oxides, Potassium Permanganate, Oryza, Manganese Compounds, Environmental Restoration and Remediation
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