电化学处理酸洗废液制备氧化铁的研究

Electrochemical Reparation of Iron Oxide from Waste Pickling

摘要: 酸洗废液是制约金属建材行业发展的一大阻碍，酸洗废液的处理问题因此成为我国近几年来的热点研究问题之一。本文采用自制电化学装置对Fe²⁺浓度为1 g/L模拟酸洗废液的处理过程及实验产物进行分析，外加电源为12 V。对实验过程中的铁离子浓度在阴阳两极出水实时变化趋势进行定量分析，得出结论：实验设备可使Fe²⁺向Fe³⁺转化，最终向沉淀转化。对实验产物进行定性分析，通过XRD表征可知产物成分为氧化铁，通过SEM表征对氧化铁产物形貌进行分析，可知产物晶体为片状，粒径为纳米，分布较为均匀。并对实验接下来的方向提出要求，制备形貌可控的氧化铁纳米材料，以及再生酸液可达到回用标准。

Abstract: Waste pickling is a major obstacle to the development of metal building materials industry, and the treatment of waste pickling has become one of the hot topics in recent years in China. In this paper, the treatment process and the experimental samples of simulated waste pickling with Fe²⁺ concentration of 1 g/L were analyzed by the self-made electrochemical device, and the external power supply was 12 V. The quantitative analysis of the real-time variation trend of ferric ion concentration in cathode and anode during the experiment was carried out. The conclusion is that the experimental equipment can transform Fe²⁺ to Fe³⁺ and finally to the precipitation. The quali-tative analysis of the experimental products showed that the samples were iron oxide by XRD, and the pattern of iron oxide was analyzed by SEM. It was found that the crystal samples was flaky, the particle size was nanometer, and well-distributed. In addition, the requirements of the following experiments were proposed to prepare the iron oxide nano-materials with controllable pattern, and the regenerated acid could be reused.