文献类型：期刊文献

英文题名：Demulsification and oil recovery from oil-in-water cutting fluid wastewater using electrochemical micromembrane technology

作者：Chen, Peng[1];Yin, Di[1];Song, Pengfei[2];Liu, Yiyang[1];Cai, Lankun[1];Wang, Hualin[1];Zhang, Lehua[1,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Thomas Nelson Community Coll, Div Sci Engn & Technol, 99 Thomas Nelson Dr, Hampton, VA 23666 USA;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2020

卷号：244

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20194307579355);WOS:【SCI-EXPANDED(收录号:WOS:000503172600055)】；

基金：This work was supported by the National Natural Science Foundation of China (NSFC) (21876050), the National key research and development plans of special project for site soils (2018YFC1800600) and the Special Fund from State Key Joint Laboratory of Environment Simulation and Pollution Control (18K10ESPCT).

语种：英文

外文关键词：Demulsification; Oil recovery; Electrochemistry; Membrane separation; Stainless steel membrane

摘要：A novel electrochemical micromembrane technology coupling membrane and electric method was developed to demulsify oily wastewater and recover oil. The diameter of the oil droplets increased to 55.0 mu m from the initial 7.0 mu m after treating the emulsion with the electrochemical micromembrane technology. Chemical oxygen demand removal rate and oil recovery reached 87.89% and 5173 mg/L, respectively, after cycling for 90 min at 10.0 V voltage with a 10.0 mm electrode distance, a 5.0 mu m micromembrane pore size and a 0.5 L/min flow rate. Micromembrane pore sizes of 1.0 and 5.0 mu m were both effective for decreasing chemical oxygen demand and recovering oil. The recovered oil was the mixture of mineral oil and ester according to the Raman infrared spectroscopy analysis. Surface charge redistribution and electrogenerated destruction for hydrophilic groups of surfactant molecules are responsible for oil coalescence. The electrochemical micromembrane technology used in this study offer an attractive treatment option to demulsify oily wastewater. (C) 2019 Elsevier Ltd. All rights reserved.