REMOVAL OF IRON AND MANGANESE IONS FROM GROUNDWATER USING KAOLIN SUB MICRO POWDER AND ITS MODIFIED FORMS

Author(s): Hassouna MEM, Shaban M and Nassif FM

Abstract

The clays have been extensively utilized for the removal of heavy metals from groundwater due to their low-cost, available natural resources and being nontoxic materials. In this work, sub micro kaolin powder has been modified to increase its adsorption ability to remove heavy metals from raw water. The removal efficiency of the natural sub - micro - kaolin powder and its acid (sulfuric & acetic acids) modified forms were investigated for the removal of iron and manganese from raw water samples collected from the northern part of Beni-Suef governorate and parallel authentic samples. The scanning electron microscopy (SEM) and X-Ray techniques were used to characterize the surface morphology of the three adsorbents viz., sub micro kaolin and its two modified forms. The adsorption efficiency of the adsorbent materials was investigated by inductively coupled plasma (ICP). The effects of sub micro kaolin dose, pH, stirring time and temperature on the removal efficiency using standard and case study samples were studied. Both modified forms showed higher adsorption efficiency than the natural clay. Moreover, the empirical values are evaluated according to the Langmuir and Freundlich isotherms that are generally used to describe the adsorption processes.

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