Biosorption of lead from milk by naoh_treated orange peel

Adsorption of Pb2+ from contaminated milk by NaOH treated orange peel due to lead contamination of pasturage، adosorption of Pb2+ from contaminated cow milk was investigated by innocuous NaOH treated orange peel. At first. Adsorption of Pb2+ was studied in aqueous solution contaminating 50ppm of Pb2+. Effect of adsorbent dose was considered in three different doses (1،2،4 g/l) temperature and particle size had no effect on Pb2+ biosorption. When pH has increased from 2 to 5. 5 Pb2+ adosorption has augmented too. Continuing this work، model solution with composition similar to milk was prepared. In this study، the effect of several parameters on adosorption of Pb2+ fram milk model solution was measured by atomic absorption. Effect of adsorbent dose was considered in three different doses (5، 10،15،g/l). The data are better had no effect on the biosorption capacity of NaOH treated orange peel. Also results show that the ion–excheng mechanism is prevailing in the adsorption of Pb2+from milk model solution.