标题: Graphitized carbon encapsulated Co anode electrochemically activating persulfate for sulfamethoxazole degradation

作者: Han, ZY (Han, Zhaoyi); Shi, H (Shi, Hao); Qiu, WT (Qiu, Wentao); Zhu, DD (Zhu, Dongdong); Li, W (Li, Wei); Wang, DH (Wang, Dihua)

来源出版物: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING  卷: 12  期: 6  文献号: 114847  DOI: 10.1016/j.jece.2024.114847  Published Date: 2024 DEC  

摘要: The excessive use of antibiotics like sulfamethoxazole (SMX) is causing environmental pollution and endangering human health and the ecosystem. Using transition metals as catalysts to activate persulfate (PS) can effectively degrade the organic pollutants in the advanced oxidation process (AOP). However, the high dissolution of the transition metals leads to poor stability, low efficiency in pollutant degradation, and secondary pollution. In this work, a graphitized carbon encapsulated Co (Co@EC) anode is developed for electrochemically activating peroxymonosulfate (PMS) to degrade SMX. It is found that the synergistic effect of Co@EC, PMS, and current significantly enhances SMX degradation. Under optimal conditions (current density of 5 mA cm- 2, pH of 9, and PMS concentration of 0.25 mM), the Co@EC anode can completely remove 10 mu M of SMX in 9 min, a much higher efficiency compared to processes without PMS, Co, or current. The rapid reaction kinetics (6.69x10- 1 min- 1) at optimal conditions are associated with the two main active species of 1O2 and O2 center dot- during electroactivation. Furthermore, the Co@EC anode maintains high degradation efficiency and low dissolution after repeated cycling tests due to its structural stability. These findings provide new insights and strategies for developing stable catalysts.

作者关键词: Advanced oxidation processes; Co@EC; Anode; Electrochemical activation; Sulfamethoxazole degradation

地址: [Han, Zhaoyi; Shi, Hao; Qiu, Wentao; Zhu, Dongdong; Li, Wei; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

通讯作者地址: Li, W; Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

电子邮件地址: wlimeel@whu.edu.cn; wangdh@whu.edu.cn

影响因子：7.4