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Enhancement of Fe-C Micro-electrolysis in Water by Magnetic Field: Mechanism, Influential Factors and Application Effectiveness
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-11-21 , DOI: 10.1016/j.jhazmat.2020.124643
Haodi Zhao , Tong Nie , Huaxin Zhao , Yuhang Liu , Jing Zhang , Qian Ye , Hao Xu , Shihu Shu

Fe-C micro-electrolysis system has been widely used in filters, or as an advanced treatment process in some water treatment plants to treat various wastewater. In this study, Fe-C micro-electrolysis process was enhanced by an economical and environmentally friendly method, applied magnetic field. Batch kinetic experiments and scanning electron micrographs demonstrated a more effective micro-electrolysis and more severely corroded on the surface of Fe-C after applying a magnetic field at pH 3.0. An applied magnetic field reduced the charge-transfer resistance and increased the current density in micro-electrolysis system and Fe-C became more prone to electrochemical corrosion. Corrosion products were proved to be Fe2+, Fe3O4, and C-O, moreover, the formation of them were also increased in the presence of a magnetic field. Base on that, some influential factors like magnetic field flux intensity, Fe-C particle size, pH, Fe-C dosage and its reusability were investigated in this paper. Since Fe2+ release was accelerated in micro-electrolysis system by an applied magnetic field, combination of various advanced oxidation processes were designed to explore the application effectiveness of the system. The degradation rate of target contaminant was significantly improved in the presence of a magnetic field, suggesting it could be a reliable method for wastewater treatment.



中文翻译:

磁场增强水中Fe-C微电解的机理,影响因素和应用效果

Fe-C微电解系统已广泛用于过滤器中,或作为某些水处理厂中的先进处理工艺来处理各种废水。在这项研究中,通过一种经济,环保的方法,即施加磁场,增强了Fe-C微电解过程。批处理动力学实验和扫描电子显微镜照片显示,在pH 3.0的磁场下,Fe-C表面的微电解更有效,并且腐蚀更严重。施加的磁场降低了微电解系统中的电荷转移电阻并增加了电流密度,Fe-C变得更容易发生电化学腐蚀。腐蚀产物被证明是Fe 2 +,Fe 3 O 4。而且,在磁场的存在下,它们的形成也增加了。在此基础上,研究了磁场强度,Fe-C粒径,pH,Fe-C用量及其可重复使用性等影响因素。由于通过施加磁场在微电解系统中加速了Fe 2+的释放,因此设计了多种先进氧化工艺的组合以探索该系统的应用有效性。在磁场的作用下,目标污染物的降解率得到了显着提高,这表明它可能是一种可靠的废水处理方法。

更新日期:2020-11-21
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