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ABSTRACT
The permeation of Cd(II) ions from aqueous phosphate medium through a supported liquid membrane (SLM) consisting of a flat disc cellulose nitrate membrane immobilizing a Cyanex-302 in kerosene as carrier has been investigated. The transfer of Cd(II) ions has been studied as a function of the stirring rate, the concentration of the extractant, the stripping solution, and the phosphate concentration in the feed. The experimental results are evaluated in terms of the permeation rate, the permeability coefficient, and the enrichment factor. The difference in the kinetic behavior of Cd(II), Cu(II), and Zn(II) when mixed together is used to improve the selective separation of Cd(II) by the investigated SLM system. The assessment of the conditions for the use of this system in pollution control of the environment with heavy metals produced from phosphate wastewater streams is discussed.