Department of Science and Environmental Engineering, Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan University, Wuhan 430079, China.
Department of Science and Environmental Engineering, Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan University, Wuhan 430079, China.
Chemosphere. 2018 Aug;204:178-185. doi: 10.1016/j.chemosphere.2018.03.194. Epub 2018 Mar 29.
Mn-Zn ferrite (MnZnFeO) was prepared by a gel method using spent alkaline Zn-Mn batteries as raw materials and employed as catalyst to degrade bisphenol A (BPA) by electro-enhanced heterogeneous activation of peroxydisulfate (PDS). The effects of initial pH, current density, PDS concentration, and Mn-Zn ferrite dosage on BPA removal were investigated. The formation of reactive radicals was verified by electron paramagnetic resonance (EPR) spectroscopy. The results of radical quenching experiments indicate that surface-bound sulfate and hydroxyl radicals played an important role in BPA removal. The stability of MnZnFeO catalyst was investigated by cycling experiments, which indicates MnZnFeO is stable and can be reused. This work also provides an alternative way for the reutilization of spent alkaline Zn-Mn batteries.
采用凝胶法以废碱性锌锰电池为原料制备了锰锌铁氧体（MnZnFeO），并将其用作催化剂通过过二硫酸盐（PDS）的电增强非均相活化来降解双酚 A（BPA）。考察了初始 pH 值、电流密度、过二硫酸盐浓度和锰锌铁氧体用量对 BPA 去除的影响。通过电子顺磁共振（EPR）光谱验证了活性自由基的形成。自由基猝灭实验的结果表明，表面结合的硫酸根自由基和羟基自由基在 BPA 去除中起重要作用。通过循环实验考察了 MnZnFeO 催化剂的稳定性，结果表明 MnZnFeO 稳定且可重复使用。这项工作还为废碱性锌锰电池的再利用提供了一种替代方法。
