Zhang He, Xiong Ruixue, Peng Shijie, Xu Desheng, Ke Jun
School of Chemical and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
Nanomaterials (Basel). 2023 May 10;13(10):1600. doi: 10.3390/nano13101600.
In this paper, high-activity manganese oxide was prepared from electrolytic manganese anode slime to realize the efficient removal of antibiotics. The effects of sulfuric acid concentration, ethanol dosage, liquid-solid ratio, leaching temperature and leaching time on the leaching of manganese from electrolytic manganese anode slime were systematically studied. Under the optimal conditions, the leaching rate of manganese reached 88.74%. In addition, a MnO catalyst was synthesized and used to activate hydrogen persulfate (PMS) to degrade tetracycline hydrochloride (TCH). The synthesized MnO was characterized by XRD, XPS, Raman, SEM and HRTEM. As a result, the prepared MnO is spherical, with high purity and crystallinity. The catalytic activity of MnO for PMS to degrade TCH was increased to 82.11%. In addition, after four cycles, the performance remained at 78.5%, showing excellent stability and recyclability. In addition, O and O are the main active species in the degradation reaction. The activity of MnO is attributed to it containing Mn(II) and Mn(III) at the same time, which can quickly realize the transformation of high-valence and low-valence manganese, promote the transfer of electrons and realize the degradation of organic pollutants.
本文以电解锰阳极泥为原料制备了高活性氧化锰，以实现抗生素的高效去除。系统研究了硫酸浓度、乙醇用量、液固比、浸出温度和浸出时间对电解锰阳极泥中锰浸出的影响。在最优条件下，锰的浸出率达到88.74%。此外，合成了MnO催化剂并用于活化过硫酸氢盐（PMS）以降解盐酸四环素（TCH）。采用XRD、XPS、拉曼光谱、扫描电子显微镜和高分辨透射电子显微镜对合成的MnO进行了表征。结果表明，制备的MnO为球形，纯度高，结晶度好。MnO对PMS降解TCH的催化活性提高到82.11%。此外，经过四个循环后，性能仍保持在78.5%，表现出优异的稳定性和可回收性。另外，O和O是降解反应中的主要活性物种。MnO的活性归因于其同时含有Mn（II）和Mn（III），能够快速实现高价锰和低价锰的转化，促进电子转移，实现有机污染物的降解。
