标题: Nonradical electron transfer-based peroxydisulfate activation by a Mn-Fe bimetallic oxide derived from spent alkaline battery for the oxidation of bisphenol A

作者: Ma, YH (Ma, Yahui); Wang, DL (Wang, Dalin); Xu, Y (Xu, Yin); Lin, H (Lin, Heng); Zhang, H (Zhang, Hui)

来源出版物: JOURNAL OF HAZARDOUS MATERIALS 卷: 436 文献号: 129172 DOI: 10.1016/j.jhazmat.2022.129172 出版年: AUG 15 2022

摘要: Mn-Fe bimetallic oxide has been employed as an outstanding peroxydisulfate (PDS) activator, but the underlying mechanism is still controversial. In this work, Mn0.27FeO4.55 (MFBO) was synthesized using the recovered waste alkaline battery and its catalytic activity and mechanism for PDS activation were explored in detail. Results show that MFBO exhibited a higher catalytic activity than the individual single metal oxides (FeOx and Mn2O3) due to the synergistic effect between Fe and Mn elements. The removal efficiency of bisphenol A (BPA) with an initial concentration of 10 mg/L reached 97.8% within 90 min in the presence of 0.5 g/L MFBO and 2.0 mM PDS. Moreover, the MFBO maintained high stability and reusability even after being recycled for five times. With the aid of a series of experiments and ex-situ/in-situ characterizations, a non-radical PDS activation mechanism was proposed, in which organic contaminants would be oxidized through a direct electron transfer pathway mediated by the metastable reactive complexes (MFBO-PDS*). Notably, the MFBO/PDS system revealed selective oxidation towards different organic pollutants and the reaction rates were closely related to their structures and properties. The research provided an effective alternation process for application of the waste battery, as well as developed a novel perspective for removal of recalcitrant aqueous contaminants through a nonradical mechanism.

作者关键词: Mn-Fe bimetallic oxide; Peroxydisulfate; Electron transfer; Selective oxidation; Spent alkaline battery

地址: [Ma, Yahui; Wang, Dalin; Lin, Heng; Zhang, Hui] Wuhan Univ, Hubei Environm Remediat Mat Engn Technol Res Ctr, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

[Xu, Yin] Hubei Univ, Fac Resources & Environm Sci, Hubei Key Lab Reg Dev & Environm Response, Wuhan 430062, Peoples R China.

[Lin, Heng] Wuhan Univ, Dept Cardiothorac Surg, ZhongNan Hosp, Wuhan 430060, Peoples R China.

通讯作者地址: Lin, H; Zhang, H (通讯作者)，Wuhan Univ, Hubei Environm Remediat Mat Engn Technol Res Ctr, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

Xu, Y (通讯作者)，Hubei Univ, Fac Resources & Environm Sci, Hubei Key Lab Reg Dev & Environm Response, Wuhan 430062, Peoples R China.

Lin, H (通讯作者)，Wuhan Univ, Dept Cardiothorac Surg, ZhongNan Hosp, Wuhan 430060, Peoples R China.

电子邮件地址: yxu1101@163.com; lheng2005@163.com; eeng@whu.edu.cn

影响因子：14.224