电渗析处理石煤提钒废水-中国有色金属学报.PDFVIP

20 7 2010 7 Vol.20 No.7 The Chinese Journal of Nonferrous Metals July 2010 1004-0609(2010)07-1440-06 1 1, 2 1 1 (1. 430070; 2. 430070) 55 V 19.84 mg/(L·s)25V 3 55 V 25 V 2 Cl−SO42− 78% X703.1 A Electrodialytic treatment of wastewater produced in vanadium extraction from stone coal 1 1, 2 1 1 BAO Shen-xu , ZHANG Yi-min , LIU Tao , CHEN Tie-jun (1. School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China; 2. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan 430070, China) Abstract: The acid wastewater produced in vanadium extraction from stone coal was desalinated by electrolysis. The results show that, at different voltages, the salinities of solutions in diluate tank vary rapidly at the beginning of desalination but slowly with the proceeding of desalination. The average desalination rate is 19.84 mg/(L·s) at 55 V, which is nearly three times faster than that at 25 V. The trends of current identified by the feature increase at initial stage and decrease sharply later. The specific power consumption at 55 V is two times higher than that at 25 V. The anions are removed in the following order: Cl−,SO42−. The maximum water recovery of one electrodialysis unit can reach 78% and the diluate can be recycled in production or