Abstract
This work highlights extraction and removal of Lignosulfonate using sunflower oil-Tri-n-octylamine (TOA) system in bulk liquid membrane transport. Maximum extraction and recovery percentages of 92.4% and 75.2% were achieved. Optimum manifold operating conditions were: 4vol.% TOA, 2±0.1 feed phase pH, 300rpm stirring speed, at 40°C with 0.2 (M) Na2SO4 solution. 1:2 (organic/aqueous) and 1:1 (aqueous/aqueous) phase ratios produced best results. Extraction (36.85kJ/mol) was found to be intermediate controlled and stripping (54.79kJ/mol) was chemical reaction controlled. Kinetic estimation of data with higher rate constants for stripping vis-à-vis extraction showed latter to be rate determining.
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