Optimization of Pb Adsorption from Seawater from Former Bauxite Mines Using Crab Shell Waste

Abstract Crab shell waste can cause pollution to the surrounding environment, but has potential be used as a biosorbent in absorption of heavy metals, especially Pb because crab shells contain CaCO3 and chitin. Methods: Several variables that play role biosorption process, among others: initial metal concentration, mass, contact time. was determined by Atomic Absorption Spectroscopy (AAS) method. Results: The results showed contained 0.019 mg/g. concentration correction factor. Optimal result for parameter is 100 mg/L with efficiency percentage (99.11 ± 0.02)% adsorption capacity (620.15 0.3) ug/g. optimal time 120 minutes (91.22 0.13)%. yield mass based on (98.01 0.2)% 2 grams. Conclusion: This study show an effective adsorption. optimization best factors process were mg/L, 3 grams 110 minutes. optimum conditions successfully applied seawater from former bauxite mine.