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Crab shell particles were used as a biosorbent to remove lead from aqueous solutions. The equilibrium isotherm showed that crab shell particles took up lead to the extent of 1300 mg Pb g -1 crab shell. The optimum pH range for maximum lead removal was increased to 5 5-11 0 compared to the shell-free control pH of 8 5-11 0. pH values of solutions with crab shell material added were...
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