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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received June 22, 2023
Revised July 14, 2023
Accepted August 9, 2023
Acknowledgements
This study was funded by the National Research Foundation of Korea (grant number: NRF-2022R1F1A1059495).
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Enhanced antibiotic removal by waste coffee grounds prepared via water washing and KOH activation

Department of Chemical Engineering, Kwangwoon University, Wolgye-dong, Nowon-gu, Seoul 01897, Korea
korea1@kw.ac.kr
Korean Journal of Chemical Engineering, October 2023, 40(10), 2489-2496(8), 10.1007/s11814-023-1550-8
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Abstract

This study presents a novel approach for effectively removing amoxicillin (AMX) from waste coffee grounds (CGs) using eco-friendly activated biochar-based adsorbents. To avoid the use of toxic chemicals, the adsorbents, called ACGs (activated CGs), were prepared by a water washing method followed by KOH activation. The adsorption performance of the ACGs was evaluated using various parameters such as the Freundlich isotherm, Langmuir isotherm, adsorption density, and pseudo-second-order equation to determine their maximum adsorption capacity and kinetics. Among the ACGs tested, ACG-4a, activated with KOH after water washing, exhibited significantly higher adsorption capacity (740.7 mg/g) compared to ACG-4b, activated with KOH after NaOH washing (549.5 mg/g). The superior adsorption capacity of ACG-4a can be attributed to its specific surface area. Notably, the ACGs demonstrated the highest AMX-adsorbing capacity when compared to other adsorbents.

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