PERMEATION OF CD(II) IONS THROUGH A SUPPORTED LIQUID MEMBRANE CONTAINING CYANEX-302 IN KEROSENE

The permeation of Cd(II) ions from aqueous phosphate medium through a supported liquid membrane (SLM) consisting of a flat disc cellulose ni trate membrane immobilizing a Cyanex-302 in kerosene as carrier has be en investigated. The transfer of Cd(II) ions has been studied as a fun ction of the stirring rate, the concentration of the extractant, the s tripping solution, and the phosphate concentration in the feed. The ex perimental 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 togethe r is used to improve the selective separation of Cd(II) by the investi gated SLM system. The assessment of the conditions for the use of this system in pollution control of the environment with heavy metals prod uced from phosphate wastewater streams is discussed.