摘要
本文以正丁醇作为有机溶剂,水作为萃取剂,依据染料在两相体系中的分配关系,选择了几种油溶性较好的染料,实验研究了电泳萃取过程所能达到的萃取效果及电压、两相流速变化对萃取率及传质通量的影响。实验结果表明,萃取率和传质通量随电压的增大而增大,在施加足够大的电压的情况下,萃取率可达90%以上,有机相流速改变对萃取效果有显著影响,有机相流速增大萃取率减小,传质通量可能存在极大值,水相流速改变对萃取效果影响不大。
A technique of electro-extraction was suggested for recovery of dyestuffs from organic solvent. According to the distribution coefficients in two-phase system ( n-butanol/water/water/dyestuffs), several dyestuffs were selected, and effect of electric field strength and two phase velocity on mass transfer was studied in an eletro-extraction equipment. The experimental results show that recovery of 90% could be reached under sufficiently high voltage. Mass flux and recovery are increased significantly by increasing electric field strength. With an increase of organic velocity recovery is decreased , while maximum mass flux may exist. The effect of changing aqueous velocity on recovery and mass flux is unconspicuous. Electro-extraction is a promising technique in treatment of organic waste.
出处
《环境化学》
CAS
CSCD
北大核心
1999年第3期258-262,共5页
Environmental Chemistry
基金
国家自然科学基金
清华大学基础研究基金
