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Date Published: 14/04/2022
Online Published: 14/04/2022
Abstract Views: 122
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DOI: https://doi.org/10.52714/dthu.11.2.2022.937
Issue
Vol. 11 No. 2 (2022): Natural Sciences Issue (Vietnamese)
Section
Natural Sciences Issue (Vietnamese)
How to Cite
Nguyen, N. B., Nguyen, H. N., & Nguyen, D. T. (2022). Using rice straw to prepare magnetic carbon material for arsenic removal. Dong Thap University Journal of Science, 11(2), 45-54. https://doi.org/10.52714/dthu.11.2.2022.937

Using rice straw to prepare magnetic carbon material for arsenic removal

Ngoc Bich Nguyen1,2, , Huu Nghi Nguyen1, Dinh Thanh Nguyen2,3
1 IT and Lab Center, Dong Thap University, Vietnam
2 Graduate University of Science and Technology, Viet Nam Academy of Science and Technology, Vietnam
3 Institute of Applied Materials Science, Viet Nam Academy of Science and Technology, Vietnam

Main Article Content

Abstract

Magnetic carbon material has been successfully synthesized from rice straw, FeCl3 and KOH by hydrothermal carbonization method at low temperature. Batch studies were conducted to examine the adsorption kinetics and adsorption capacity of magnetic carbon material (MC) for As(V). The obtained materials was characterized using XRD, SEM, EDX, FT-IR, BET and VSM. The research show that the obtained materials have high specific surface area (171 m2/g) and magnetization (33 emu/g). The pseudo-second order rate equation was found to describe better the kinetics of arsenic adsorption than The pseudo-first order. Although the two models both describe the experimental data well, the isotherm data for As(V) removal fitted better with the Langmuir equation compared with the Freundlich model. With an initial arsenic concentration of 400 µg.L-1, the content after adsorption treatment was lower than the allowable arsenic limit in drinking water (10 µg/L) as prescribed by the World Health Organization (WHO). Therefore, the sample had a high surface area, magnetic properties and removal of arsenic ion from aqueous solution, which promised to become a potential adsorbent.

Article Details

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Keywords

Hydrothermal carbonization, rice straw, removal of arsenic

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