Sorption of Pb2+ in waters by culture medium waste of mushroom

The mechanism and function of sorption of Pb²⁺ in waters by culture mushroom waste were studied. The carboxyl, phosphoryl, phenolic in the waste were the main functional groups causing the sorption speed quicker, 30~50 min could reach equilibrium, the actual sorption process was identical relatively with pseudo-second-order Lagergren model. When the pH values were 4.09-6.00, the sorption efficiency was high relatively. When Pb²⁺ concentrations were 20, 50, 100 mg/L, the best usage amounts of absorbent were l, 2, 5 g/L respectively. The greatest sorption amount was 714.29 mg/g, when Langmiur isothermal sorption equation was used to estimated sorption.