标题: Insight into the role of electrolytes on the electrolytic Fe2+-activated peroxymonosulfate: Silicates for enhanced decontamination and sustainable electrolysis
作者: Zhao, LK (Zhao, Likun); Xin, K (Xin, Kun); He, Y (He, Ye); Li, Y (Li, Yan); Mao, XH (Mao, Xuhui); Luo, K (Luo, Kun); Wang, X (Wang, Xu); Alshawabkeh, AN (Alshawabkeh, Akram N.); Xia, B (Xia, Bin); Cui, JX (Cui, Jiaxin)
来源出版物: ELECTROCHIMICA ACTA 卷: 542 文献号: 147423 DOI: 10.1016/j.electacta.2025.147423 Published Date: 2025 DEC 1
摘要: Electrolytic Fe2+-activated peroxymonosulfate (EFP) is a promising technology for removing organic pollutants from wastewaters. However, the impact of electrolytes on the performance of EFP needs to be explored in depth. This study systematically investigated the impacts of various inorganic anions (as supporting electrolytes) on the iron dissolution behavior and ibuprofen (IBP) degradation within the EFP system. The experimental results revealed that the EFP system with a silicate electrolyte maintained continuous iron dissolution and demonstrated favorable performance in the removal of IBP. The order of electrolytes favoring IBP removal was as follows: silicate > sulfate, nitrate, chloride > bicarbonate > phosphate. Specifically, silicate could coordinate with the Fe2+ ions that were released from the iron anode, thereby preventing the scaling of electrode. Meanwhile, the generated reactive species in the EFP, such as SO4-<middle dot> and <middle dot>OH, were responsible for the oxidation of IBP. Based on the positive effect of silicate, a silicate-enhanced EFP was proposed for further optimization. The degradation of IBP was significantly correlated with the electrical current density and the PMS concentration, and the performance of EFP system can be regulated with electrical current. When the silicate-enhanced EFP was applied to the treatment of actual pharmaceutical wastewater, it not only showed the capability of removing COD, but also notably reduced the specific energy consumption by up to 44.4 %, compared to the silicate-free EFP system. Overall, this study highlights the superiority of silicate-containing electrolytes for the EFP system and in other electrochemical wastewater treating systems using iron anode.
作者关键词: Wastewater treatment; Activated peroxymonosulfate; Silicate; Electrolyte effect; Iron anode
KeyWords Plus: FENTON-OXIDATION; WATER-TREATMENT; DEGRADATION; IBUPROFEN; COAGULATION
地址: [Zhao, Likun; Xin, Kun; He, Ye; Li, Yan; Mao, Xuhui; Wang, Xu] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.
[Luo, Kun; Cui, Jiaxin] Changjiang Survey Planning Design & Res Co Ltd, Wuhan 430010, Peoples R China.
[Alshawabkeh, Akram N.] Northeastern Univ, Dept Civil & Environm Engn, Boston, MA 02115 USA.
[Xia, Bin] Lishui Jiayuan Environm Engn Co Ltd, Lishui 323400, Zhejiang Prov, Peoples R China.
通讯作者地址: Mao, XH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.
Cui, JX (通讯作者)，Changjiang Survey Planning Design & Res Co Ltd, Wuhan 430010, Peoples R China.
电子邮件地址: [email protected]; [email protected]
影响因子：5.6
