Estimation of Pb from Metal and Electroplating Industrial Waste by Zeolite-3A

摘要

The concentration of lead in sediment and liquid waste samples of selected metal electroplating industries was measured by atomic absorption spectrophotometer. The data obtained revealed that lead content in liquid wastes varies in the range of 0.582-14.97 mg L~(-1) and 1.300- 757.8 mg Kg~(-1) in sediments. Removal of lead in the sediments and liquid waste was then carried out using zeolite-3A. Result shows the quantitative removal of lead. Factors that effect the lead removal include the adsorbent concentration, pH and temperature. The applicability of Freundlich, Langmuir and Dubinin - Radushkevich equations for the present system has been tested and the values of distribution coefficient were also evaluated. Thermodynamic parameters like ΔG°, ΔH° and ΔS° were also calculated. The results of such studies suggested that about (99.9%) removal was obtained by using zeolite-3A. It show that zeolite- 3A could be utilized as a potential decontaminate for the removal of lead from metal electroplating industries waste before discharging into hydrosphere.