Biochar pyrolytically produced from municipal solid wastes for aqueous As(V) removal: Adsorption property and its improvement with KOH activation
Abstract
Biochar converted from waste products is being considered as an alternative adsorbent for removal of aqueous heavy metal(loid)s. In this work, experimental and modeling investigations were conducted to examine the effect of biochars pyrolytically produced from municipal solid wastes on removing aqueous As(V) before and after activated by 2M KOH solution. Results showed that the highest adsorption capacity of pristine biochars was 24.49 mg/g. The pseudo-second-order model and Langmuir adsorption isotherm model can preferably describe the adsorption process. The activated biochar showed enhanced As(V) adsorption ability with an adsorption capacity of 30.98 mg/g, which was more than 1.3 times of pristine biochars, and 2-10 times of modified biochars reported by other literatures. Increase of surface area and changes of porous texture, especially the functional groups on the surface of activated biochars are the major contributors to its more efficient adsorption of As(V).
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Potassium hydroxide modification increases the surface area of biochar prepared by pyrolysis from 14.4 to 49.1 m2/g, and increases oxygen-containing functional groups, thus enhancing the sorption capacity of As(V) from 24.49 mg/g for the original biochar to 30.98 mg/g.
“Potassium hydroxide modification increases the surface area of biochar prepared by pyrolysis from 14.4 to 49.1 m 2 · g -1 , and increases the oxygen-containing functional groups, thus enhancing the sorption capacity of As(V) from 24.49 mg · g -1 for the original biochar to 30.98 mg · g -1 (Jin et al. 2014).”
From Modified biochar: synthesis and mechanism for removal of environmental heavy metals (2022) · cites this paper as Jin et al. 2014
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- Authors
- Jin, H., Capareda, S., Chang, Z., Gao, J., Xu, Y., & Zhang, J.
- Affiliations
- Jiangsu Academy of Agricultural Sciences (CN)
- Texas A&M University (US)
- Ministry of Ecology and Environment (CN)
- Corresponding author
- Chang, Zhizhou
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2014-10
- Volume
- 169
- Pages
- 622-629
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2056698497
- Cited by
- 437
- References
- 36
- Citations by year
- 2026: 21 · 2025: 41 · 2024: 49 · 2023: 45 · 2022: 72 · 2021: 54 · 2020: 49 · 2019: 33 · 2018: 31 · 2017: 27 · 2016: 11 · 2015: 4
- FWCI
- 10.64
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (21107038)
- Agricultural Science and Technology of Jiangsu Province (CX(12)5055)
- Agro-scientific Research in the Public Interest (201203050)
- Natural Science Foundation of Jiangsu Province (2011079)
- 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
- biochar, municipal solid waste, pyrolysis, arsenic(V) removal, adsorption, KOH activation, heavy metal removal, adsorption isotherms, pseudo-second-order kinetics, surface functional groups, porous texture, surface area
- MeSH terms
- Adsorption, Arsenic, Charcoal, Cities, Hot Temperature, Hydrogen-Ion Concentration, Hydroxides, Kinetics, Texas, Time Factors, Water Pollutants, Chemical, Porosity, Potassium Compounds, Water Purification, Biomass, Solid Waste
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