Performance of CO2 and Fe-modified lignin char on arsenic (V) removal from water
Abstract
Biochar was produced by the pyrolysis of Kraft lignin at 600 °C followed by modification with CO 2 at 700 and 800 °C and impregnation with FeOx. The physicochemical properties and arsenic (V) adsorption performance of biochar were evaluated. The characteristics of the lignin biochar before and after CO 2 modification and FeOx impregnation were analyzed using the following methods: proximate and ultimate analysis, specific surface area (Brunauer-Emmett-Teller (BET) surface area), porosity, scanning electron microscopy and energy dispersive spectroscopy mapping, Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy. The specific surface area and porosity of biochar were improved significantly after CO 2 modification. However, impregnation of FeOx in CO 2-modified biochar showed a 50%-60% decrease of BET surface area and porosity due to pore blocking of FeOx. The batch adsorption of arsenic (V) showed that FeOx-LC-800 (FeOx impregnation lignin char modified with CO 2 at 800 °C) had the highest adsorption efficiency among the biochars tested because of its highest Fe-O intensity and large surface area. The Langmuir adsorption model was suitable for the curve fitting arsenic (V) adsorption. The theoretical equilibrium adsorption amount (q e) was calculated to be 6.8 mg/g using a pseudo-second-order kinetic model.
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Pyrolyzed sulfate lignin biochar modified with CO2 at 800 °C and impregnated with FeOx improved the sorption efficiency of arsenic in an aqueous solution.
“pyrolyzed sulfate lignin biochar modified with CO 2 at 800 °C and impregnated with FeO x improved the sorption efficiency of arsenic in an aqueous solution (Cha etal. 2021).”
From Modified biochar: synthesis and mechanism for removal of environmental heavy metals (2022) · cites this paper as Cha et al. 2021
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- Authors
- Cha, J. S., Jang, S.-H., Lam, S. S., Kim, H., Kim, Y.-M., Jeon, B.-H., & Park, Y.-K.
- Affiliations
- Pusan National University (KR)
- Universiti Malaysia Terengganu (MY)
- Daegu University (KR)
- Hanyang University (KR)
- University of Seoul (KR)
- Corresponding author
- Park, Young-Kwon
- Venue
- Chemosphere
- Publisher
- Elsevier BV
- Published
- 2021-09
- Volume
- 279
- Pages
- 130521
- ISSN
- 0045-6535 (ISSN-L)
- OpenAlex
- W3155306915
- Cited by
- 39
- References
- 47
- Citations by year
- 2025: 3 · 2024: 5 · 2023: 17 · 2022: 9 · 2021: 5
- FWCI
- 3.40
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Chemosphere (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Research Foundation of Korea
- Ministry of Science, ICT and Future Planning (2019R1F1A1061702)
- 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(V) adsorption, water treatment, kraft lignin, pyrolysis, specific surface area, porosity, pore blocking, Langmuir isotherm, pseudo-second-order kinetics, heavy metal removal
- MeSH terms
- Adsorption, Arsenic, Carbon Dioxide, Charcoal, Kinetics, Lignin, Water, Water Pollutants, Chemical
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