Abstract
Natural zeolites and clays are known as effective and low-cost materials to use as adsorbents of different pollutants. The adsorption behavior of the Pb2+ ions adsorption on Kazakhstani natural zeolite and Ukrainian Chamotte clay has been studied in this work. The samples are characterized by SEM, EDAX, and XRD methods. The maximum uptake of lead ions (qmax) was determined as 14 mg/g for zeolite and 11 mg/g for clay. Langmuir and Freundlich isotherm models were used to describe the adsorption mechanism. It was observed that Langmuir isotherm model best describes the adsorption of Pb2+ on natural zeolite and clay. The separation factors (KR) were calculated from the Langmuir isotherm.
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