Electroextraction separation of dyestuffs

Electroseparation technologies have prospects for significant growth well i nto the next century. Electroextraction, a coupled separation technique of solvent extraction with electrophoresis, was used to remove dyestuffs from their aqueous stream. A study on the characteristics of the separation tech nique was carried out with n-butanol/acid-chrom blue K/water and n-butanol/ methyl blue/water as working systems. A continuous separation equipment was designed and used in this work. The influences of two-phase flow, field st rength, and concentration of the feed on the recovery of solute were studie d. The results showed that much higher recovery of solute with less solvent consumption could be achieved by using this technique to remove dyes from their aqueous streams, especially for the separation of the dilute solution . When the field strength is increased, the recovery and mass flux increase . When the feed flow rate and the initial solute concentration are increase d, the recovery decreases and the mass flux increases.