标题: Efficient carbamazepine degradation by modified copper tailings and PMS system: Performance evaluation and mechanism

作者: Pan, C (Pan, Cong); Sun, Y (Sun, Yan); Dong, YQ (Dong, Yiqie); Hou, HB (Hou, Haobo); Kai, MF (Kai, Ming-Feng); Lan, JR (Lan, Jirong)

来源出版物: JOURNAL OF HAZARDOUS MATERIALS卷: 465文献号: 133198 DOI: 10.1016/j.jhazmat.2023.133198提前访问日期: DEC 2023

摘要: It is a green and sustainable path to establish cheap solid waste-based catalyst to establish peroxymonosulfate (PMS) catalytic system for the degradation of carbamazepine (CBZ) in water. In this study, durable copper tailing waste residue-based catalyst (CSWR) was prepared, and efficient CSWR/PMS system was constructed for catalytic degradation of CBZ for first time. The morphology and structure of CSWR changed from clumps to porous and loose amorphous by alkali leaching and medium temperature calcination. The reconstructed surface of the CSWR exposes more active sites promotes the catalytic reaction and increases the degradation rate of CBZ by more than 39.8 times. And the CSWR/PMS achieved a CBZ removal of nearly 99.99 % in 20 min. In particular, perovskite-type iron-calcium compounds were formed, which stimulated the production of more HO center dot and SO4 center dot- in the system. DFT calculation shows that CSWR has stronger adsorption energy and electron transfer ability to PMS molecules, which improved the degradation efficiency of the system. In general, this study proposed a means of high-value waste utilization, which provided a new idea for the preparation of solid waste based environmental functional materials and is expected to be widely used in practical wastewater treatment.

作者关键词: Copper tailing; CSWR/PMS system; Amorphous structure; High value application; Carbamazepine

地址: [Pan, Cong; Hou, Haobo; Lan, Jirong] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Sun, Yan; Kai, Ming-Feng; Lan, Jirong] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China.

[Dong, Yiqie] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.

通讯作者地址: Lan, JR (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址:lanjirong3636@126.com

影响因子：13.6