摘要
采用循环式电渗析器处理石煤提钒过程中产生的大量高盐度、富含重金属的酸性废水。结果表明:在不同电压条件下,淡水箱中的盐度在脱盐开始时变化显著,随着脱盐的进行,盐度变化逐渐趋于平缓;55V时的平均脱盐速率为19.84mg/(L·s),约为25V时脱盐速率的3倍;电流随时间都表现出先上升再下降的变化趋势,55V时的单位能耗为25V时的2倍。脱盐过程中,阴离子的脱除顺序为Cl-、SO42-。试验中单台循环式电渗析的最大淡水产率为78%,淡水可回收用于工业生产或排放。
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 discharged.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第7期1440-1445,共6页
The Chinese Journal of Nonferrous Metals
基金
国家博士后科学基金资助项目(20080440967)
"十一五"国家科技支撑计划课题资助项目(2007BAB15B02)
关键词
电渗析
高盐废水
钒
石煤
electrodialysis
high-salt wastewater
vanadium
stone coal
