Degradation of Tetracycline in Water by Fe-Modified Sterculia Foetida Biochar Activated Peroxodisulfate

Yuchen Zhang, Xigai Jia, Ziyang Kang, Xiaoxuan Kang, Ming Ge, Dongbin Zhang, Jilun Wei, Chongqing Wang () and Zhangxing He ()
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Yuchen Zhang: College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China
Xigai Jia: College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China
Ziyang Kang: College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China
Xiaoxuan Kang: College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China
Ming Ge: College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China
Dongbin Zhang: Tangshan Sanyou Group Xingda Chemical Fiber Co., Ltd., Tangshan 063305, China
Jilun Wei: Tangshan Sanyou Group Xingda Chemical Fiber Co., Ltd., Tangshan 063305, China
Chongqing Wang: School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
Zhangxing He: College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China

Sustainability, 2022, vol. 14, issue 19, 1-19

Abstract: Tetracycline (TC) is a broad-spectrum antibiotic commonly, made use of in aquaculture and animal husbandry. After entering water bodies, it will represent a major threat to human health. In this study, sterculia foetida biochar (SFC) was readied by the combined hydrothermal pyrolysis (co-HTP) method with sterculia foetida as raw materials. Fen-SFC (Fe 2 -SFC, Fe 3 -SFC, and Fe 4 -SFC) was obtained by doping SFH with different concentrations of FeCl 3 . Finally, activation of peroxodisulfate (PDS) was achieved, using Fe 3 -SFC to degrade TC. The degradation of TC obeyed pseudo-second-order kinetics, and the constant of the reaction rate was 0.491 L mg −1 min −1 . Radical trapping experiments, EPR test and electrochemical tests evidenced that the high catalytic performance of the Fe 3 -SFC/PDS system was ascribed to free radical pathway (•OH and SO 4 •− ) and non-radical pathway ( 1 O 2 and electron transfer), in which the latter plays a dominant role. This research not only demonstrates a new kind of biochar as an effective catalyst for PS activation, but also offers an avenue for the value-added reuse of sterculia foetida.

Keywords: peroxydisulfate activation; biochar; sterculia foetida; tetracycline wastewater; degradation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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