Fe-doped boron nitride for adsorption of oxytetracycline in pharmaceutical wastewater
Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 5
Abstract
To reduce the environmental pollution of oxytetracycline (OTC) in pharmaceutical wastewater, Fe-doped boron nitride nanosheets (Fe-BN) were synthesized in one step with a green and rapid ball milling process, and the adsorption performance of oxytetracycline on them was investigated. The shear stress provided by the mill balls completed thinning and Fe doping of BN at the same time. The properties of the adsorbent were analyzed by XRD, FTIR, XPS, TEM and nitrogen adsorption. Fe(5%)-BN with the best performance was selected for comprehensive adsorption performance and mechanism research, and the results showed that the specific surface area of it was enhanced more than 3 times after 45 minutes of ball milling. Fe element was mainly doped in the BN lamellar structure in the form of Fe_2O_3. Compared with commercial boron nitride, the adsorption capacity of OTC on Fe(5%)-BN increased by 7.7 times. The adsorption conforms to the quasi-second-order kinetic model and Freundlich isotherm model and the adsorption process is spontaneous endothermic. The adsorption is mainly through cation bridge, electrostatic interaction and π—π interaction. After four adsorption-desorption cycles, the removal efficiency of OTC was still higher than 94%, indicating the good cyclic stability of Fe(5%)-BN.
Authors and Affiliations
WANG Yong|School of Pharmacy, Jiangsu University, China, WU Haofeng|State Key Laboratory of Heavy Oil, China University of Petroleum-Beijing, China, JIN Yan|School of Pharmacy, Jiangsu University, China, LUO Guiling|School of Pharmacy, Jiangsu University, China, CHAO Yanhong|School of Pharmacy, Jiangsu University, China, State Key Laboratory of Heavy Oil, China University of Petroleum-Beijing, China, ZHU Wenshuai*|State Key Laboratory of Heavy Oil, China University of Petroleum-Beijing, China
Keywords
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- EP ID EP738001
- DOI 10.20078/j.eep.20230208
- Views 36
- Downloads 0
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