Jornal de Ciência e Tecnologia de Membranas

Abstrato

Extraction and Facilitated Transport of Cd(II) Ions across Triethylenediamine-Carbon Tetrachloride Supported Liquid Membranes

Naheed Bibi*, Hanif Ur Rehman, Kamin Khan, Aisha Kanwal, Rana Gul, Khurshid Ali, and Nauman Ali

The extraction of Cadmium (II) (Cd(II)) ions across a Supported Liquid Membrane (SLM) using Triethyleneamine (TEDA) in Carbon tetrachloride (CCl4) as a carrier, was investigated. The aforementioned carrier was embodied within the microporous polypropylene membrane. Hereby, we present the results of optimization of certain conditions like acid and carrier concentration in feed and membrane phase respectively, stripping phase makeup, and their effects on stripping of the metal ions from the feed solution. 1.0 M HNO3 in the feed solution, 1.5 M in stripping phase, 3.75 M of TEDA in membrane phase and 2.36 × 10-3 mol/dm3 of Cd(II) metals ions concentrations were found to be the optimum conditions for the extraction of Cd(II). Some theoretical equations were proposed which were beneficial in investigating the extraction mechanism and stoichiometry of the physio-chemical processes occurring in the organic membrane phase. Characterization of the SLM through flux, permeability and diffusion coefficient and an investigation into its stability for applications in the industry were also carried out.