ADSORPTION OF LEAD FROM WASTE WATER BY Str. rimosus
Hu Gang, Zhang Li, Tong Mingrong, Yu Yaoting (Bioactive Materials Research Laboratory, Institute for Molecular Biology, Nankai University, Tianjin, 300071)
This paper reported the adsorption of Pb 2+ from solution by using pharmaceutical fermetnation waste Str.rimosus when pH of solution decreased from 4 to 2, the Pb 2+ uptake increased from 115mg/g to 150mg/g. The Pb 2+ uptake by Str.rimosus was an endothermic process. The Pb 2+ uptake increased when the particle size of the biomass decreased. Pretreatment with HNO 3 and NaOH caused the Pb 2+ uptake by Str.rimosus decrease and increase respectively. Co ion (Cu 2+ ) in the solution competed for the adsorption sites of the biomass and restrained the adsorption of Pb 2+ .