标题: Modified nickel-cobalt tailing activated PMS for highly efficient degradation of organic pollutants: Multiple-scale effect and active sites

作者: Xiang, YW (Xiang, Yuwei); Lan, JR (Lan, Jirong); Cai, YA (Cai, Yungao); Dong, YQ (Dong, Yiqie); Hou, HB (Hou, Haobo)

来源出版物: CHEMICAL ENGINEERING JOURNAL 卷: 482 文献号: 149196 DOI: 10.1016/j.cej.2024.149196 提前访问日期: JAN 2024 出版年: FEB 15 2024

摘要: The use of nickel-cobalt tailings rich in nickel, cobalt, and iron to produce catalytic materials that drive advanced oxidation systems for PMS is a sustainable strategy. This study uses a combination of alkali modification and calcination to prepare a novel waste-based PMS-AOPs catalytic material (NCT-beta), and its catalytic activity against organic pollutants (RB-19, BPA, RhB, SMX, CBZ, and BA) was investigated under the activation of PMS, for first time. The characterization results showed that NCT-beta was modified into a multi-layer honeycomb with irregular surface, which can provide abundant active sites for chemical reactions, and expose metal elements on the surface of the material, promoting the electron transfer efficiency of organic pollutant degradation. The degradation rate of NCT-beta to RB-19 was 98.26 % within 30 min, and the catalytic efficiency was still more than 80 % when repeated use. Free radical pathway dominates the degradation process of organic pollutants, 1O2, & sdot;O2, and & sdot;OH are the main active radicals. Density functional theory (DFT) results indicate that the (020) crystal plane exposed by NCT-beta is the strongest site of action for pollutants and PMS. This study provides a solution for developing green environmental functional materials based on solid waste and treating waste with waste.

作者关键词: Nickel tailings; PMS-AOPs; Active radicals; Crystallographic plane; Density functional theory

地址: [Xiang, Yuwei; Cai, Yungao; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan, Peoples R China.

[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, Peoples R China.

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

Lan, JR (通讯作者)，Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China.

电子邮件地址: lanjirong3636@126.com; houhb@whu.edu.cn

影响因子：15.1