Solvent Extraction of Silk Dyes Acid Red 10B and Acid Pink Using Tri-n-butyl Phosphate as Carrier
* Author to whom correspondence should be addressed
E-mail: kpvelu@hotmail.com
K. Palanivelu*
Centre for Environmental Studies, Anna University, Chennai 600 025
N. Hajarabeevi and I. Mohammed Bital
B.S.A. Crescent Engineering College, Chennai 600 048

Paper received :16.5.06 Revised paper accepted : 21.7.06

The extraction behaviour of anionic Acid Red 10 B and Acid Pink, which are commonly used as textile silk dyes, was studied by tri-n-butyl phosphate (TBP) as carrier and hexane as diluent. The effect of parameters such as pH of feed, stripping reagent concentration, ratio of carrier and diluent (TBP & Hexane), equilibrium time, ratio of aqueous to solvent and reusability of solvent, and initial concentration of dyes were examined. The optimum conditions for recovery were pH of the feed 1.0 ± 0.2, 0.5 M sodium hydroxide as stripping phase, 1:1 TBP - Hexane ratio, 1:1 aqueous / solvent ratio and 5 minutes equilibrium time. The maximum extraction and stripping under optimum conditions observed for Acid Red 10 B were 99.0% and 98.5 % and for Acid Pink were 91.3 % and 90.5% , respectively.

 

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