Abstract

Djamila Bouazza^1*, Abdelkader Tayeb¹, Mohamed Sassi¹, Abdelkader Bengueddach¹ and Anne Boos²

DOI : http://dx.doi.org/10.13005/ojc/290319

The solid-liquid extraction of Cu(II) from sulfate media at 25°C by sodium homoionic montmorillonites impregnated either with di-2,4,4-trimethylpentyl phosphinic acid(DTMPPA) whose commercial name is Cyanex 272, or with1-tolyl-3-methyl-4-dodecanoylpyrazol-5-one (HTMDDP) has been studied. The extracting agent impregnated solids were characterized by infrared spectroscopy (IR) and X-ray diffraction. The total amounts of loaded extractants were determined by UV spectrometry on washings and/or parent solutions. The ability of each impregnated clay to remove copper from aqueous media was studied in terms of shaking time, equilibrium pH and solid/liquid ratio. The different experimental results have shown that the clay containing HTMDDP leads to better performances for the extraction of copper with respect to capacity as well as pH values. The capacities for HTMDDP and DTMPPA impregnated solids are found to be 320 mmol/kg and 200 mmol/kg and extraction is total at equilibrium pH above 2.2 and 4.7, respectively. The HTMDD-impregnated clay has been found to have high metal ion extractability and hence good potential as an alternative to established solvent extraction systems

Bentonite;clay – impregnation;Solid-liquid extraction;Copper;Separation

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