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- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received November 18, 2023
Accepted February 17, 2024
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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
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Effect of Oxyfl uorination of Activated Carbon on the Adsorption of Tetracycline from Aqueous Solutions
Abstract
Oxyfl uorination treatment was used to enhance the capacity for adsorption of tetracycline (TC) from aqueous systems by
activated carbon (AC). The AC was oxyfl uorinated at room temperature for 5 min in a batch reactor, and the ratio of O 2 and
F 2 gas was used as a variable. The oxyfl uorination treatment increased the oxygen functional group content on the AC by
up to 19.4%. The specifi c surface area of the oxyfl uorinated AC was decreased by up to 31.7% and the micropore volume
was decreased by up to 30.6% due to strong etching by fl uorine radicals. AC-O7F3 with a 19.4 at% oxygen group content
showed the best TC adsorption performance because the increased number of oxygen functional groups enabled hydrogen
bonding. However, the AC-O5F5 sample treated with a high fl uorine partial pressure showed poor TC adsorption, which was
attributed to the collapse of the pore structure and a decrease in the specifi c surface area due to perfl uorination. Meanwhile,
the TC adsorption process showed pseudo second-order kinetics and a good fi t with the Langmuir model.
