An o-xylene-ME-24 supported liquid membrane was prepared for the permeation of As(III) in a hydrochloric acid solution. The partition coefficients of As (III) at various HCl concentrations were measured. The overall permeation coefficients obtained were 0.54-1.9X 10-3 cm/s, depending on HCl concentration of the feed phase and the stirring speed. The overall permeation coefficient for the feed phase of 9.6 M HCl levelled off as the stirring speed was increased beyond 800 min-1. The minimum feed aqueous film resistance obtained was 480 s/cm, and the membrane resistance was 340 s/cm. The governing resistance of As(III) permeation in the system is the feed aqueous film resistance when the feed phase HCl concentration is greater than 7.2 M.
All Science Journal Classification (ASJC) codes
- Industrial and Manufacturing Engineering
- Metals and Alloys
- Materials Chemistry