文献类型：期刊文献

英文题名：Process Optimization of Steel Pickling Waste Liquor Treated by Electrochemical Synthesis of Fe3O4

作者：Gao, Shuangshuang[1];Chen, Jingwen[1];Huang, Guangtuan[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Natl Engn Lab Ind Wastewater Treatment, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2022

卷号：233

期号：9

外文期刊名：WATER AIR AND SOIL POLLUTION

收录：;EI(收录号：20223612678201);WOS:【SCI-EXPANDED(收录号:WOS:000846792300001)】；

语种：英文

外文关键词：Steel pickling waste liquor; Electrochemical synthesis; RSM; Fe3O4

摘要：A simple electrochemical method is proposed for recovering iron from steel pickling waste liquor with graphite plates as electrodes. In this study, response surface methodology (RSM) was used to optimize the experimental conditions and assess the effect of the process variables, including initial pH, reaction temperature (T), current density (J), and reaction time (t), on total iron (TFe) removal. The model obtained by analyzing data with Design Expert 8.0.6 was very significant, and pH had the most significant effect on TFe removal. The optimum reaction conditions were pH = 9, T = 35 degrees C, J = 20.07 mA/cm(2), and t = 30 min, under which conditions the removal rate was more than 99.99%, the residual TFe = 0.28 mg/L at the initial TFe of 10 g/L, and the obtained product had strong magnetism. Therefore, the method of electrochemical synthesis of Fe3O4 is promising in the treatment and recycling of steel pickling waste liquor.