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Citation: Jianjun LI, Mingjie REN, Lili ZHANG, Lingling ZENG, Huiling WANG, Xiangwu MENG. UV-assisted degradation of tetracycline hydrochloride by MnFe2O4@activated carbon activated persulfate[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(10): 1869-1880. doi: 10.11862/CJIC.20240187 shu

UV-assisted degradation of tetracycline hydrochloride by MnFe2O4@activated carbon activated persulfate

  • 1.

    Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China

  • 2.

    Anhui Kangda Testing Technology Co., Ltd., Wuhu, Anhui 241000, China

  • 3.

    Anhui Common Technology Research Center of Coal-Based Solid Waste New Materials Industry, Huainan, Anhui 232001, China

  • Corresponding author: Jianjun LI, ljj.hero@126.com
  • Received Date: 21 May 2024
    Revised Date: 5 September 2024

Figures(14)

  • The magnetic catalyst MnFe2O4@AC (MFA) was synthesized using a water bath-inverse co-precipitation method and was systematically characterized to assess its structural and magnetic properties. The results indicated that MnFe 2O4 nanoparticles were successfully encapsulated on the surface of activated carbon (AC), resulting in a multistage pore structure. Although the specific surface area of MFA decreased compared to that of the AC base material, it remained high at 176 m2·g-1, with an average pore size of 8.49 nm. The specific magnetization intensity of MFA reached 38.92 emu·g-1, enabling high-efficiency solid-liquid separation when subjected to an external magnetic field. Tetracycline hydrochloride (TC) was degraded using activated peroxymonosulfate (PMS) with UV-assisted activation, employing MFA as a catalyst. The degradation rate of TC in the MFA/PMS system under UV irradiation achieved 97.70%, which was 1.2 times that of the system without UV irradiation. The presence of coexisting anions, the pharmaceutical matrix, and the initial mass concentration of TC significantly influenced the catalytic performance of the system. Notably, the degradation rate remained at 82.76% after five cycles. Free radical burst experiments revealed that superoxide radicals (·O2-) and monoclinic oxygen (1O2) were the primary reactive oxygen species in the UV-assisted MFA/PMS advanced oxidation system. Mechanistic analysis indicated that the high adsor p-tion capacity of MFA provided a solid foundation for catalytic degradation, and the synergistic effect of UV irradiation with the MFA/PMS advanced oxidation system significantly enhanced the generation efficiency of reactive species, thereby facilitating the degradation of organic molecules.
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