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Volume 16
Issue 11
10.3390/ma16113994
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Article

Removal Performance of KOH-Modified Biochar from Tropical Biomass on Tetracycline and Cr(VI)

by
Qingxiang Wang
1,†,
Yan Yue
2,†,
Wenfei Liu
3,
Qing Liu
1,
Yu Song
1,
Chengjun Ge
4,* and
Hongfang Ma
1,*
1
School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
2
Engineering and Technology Center of Electrochemistry, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
3
Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
4
Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou 570228, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Materials 2023, 16(11), 3994; https://doi.org/10.3390/ma16113994
Submission received: 8 May 2023 / Revised: 23 May 2023 / Accepted: 24 May 2023 / Published: 26 May 2023
(This article belongs to the Special Issue Recent Progress of Biochar and Biomass Pyrolysis)
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Abstract

Biochar can be used to address the excessive use of tetracycline and micronutrient chromium (Cr) in wastewater that potentially threatens human health. However, there is little information about how the biochar, made from different tropical biomass, facilitates tetracycline and hexavalent chromium (Cr(VI)) removal from aqueous solution. In this study, biochar was prepared from cassava stalk, rubber wood and sugarcane bagasse, then further modified with KOH to remove tetracycline and Cr(VI). Results showed that pore characteristics and redox capacity of biochar were improved after modification. KOH-modified rubber wood biochar had the highest removal of tetracycline and Cr(VI), 1.85 times and 6 times higher than unmodified biochar. Tetracycline and Cr(VI) can be removed by electrostatic adsorption, reduction reaction, π–π stacking interaction, hydrogen bonding, pore filling effect and surface complexation. These observations will improve the understanding of the simultaneous removal of tetracycline and anionic heavy metals from wastewater.
Keywords: KOH-modified biochar; coexisting pollutant; tropical biomass; removal mechanism KOH-modified biochar; coexisting pollutant; tropical biomass; removal mechanism

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MDPI and ACS Style

Wang, Q.; Yue, Y.; Liu, W.; Liu, Q.; Song, Y.; Ge, C.; Ma, H. Removal Performance of KOH-Modified Biochar from Tropical Biomass on Tetracycline and Cr(VI). Materials 2023, 16, 3994. https://doi.org/10.3390/ma16113994

AMA Style

Wang Q, Yue Y, Liu W, Liu Q, Song Y, Ge C, Ma H. Removal Performance of KOH-Modified Biochar from Tropical Biomass on Tetracycline and Cr(VI). Materials. 2023; 16(11):3994. https://doi.org/10.3390/ma16113994

Chicago/Turabian Style

Wang, Qingxiang, Yan Yue, Wenfei Liu, Qing Liu, Yu Song, Chengjun Ge, and Hongfang Ma. 2023. "Removal Performance of KOH-Modified Biochar from Tropical Biomass on Tetracycline and Cr(VI)" Materials 16, no. 11: 3994. https://doi.org/10.3390/ma16113994

APA Style

Wang, Q., Yue, Y., Liu, W., Liu, Q., Song, Y., Ge, C., & Ma, H. (2023). Removal Performance of KOH-Modified Biochar from Tropical Biomass on Tetracycline and Cr(VI). Materials, 16(11), 3994. https://doi.org/10.3390/ma16113994

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