Biosorption of Pb(II) and Cu(II) by activated sludge in batch and continuous-flow stirred reactors.
Biosorption of Pb(II) and Cu(II) ions in single component and binary systems was studied using activated sludge in batch and continuous-flow stirred reactors. In biosorption experiments, the activated sludge in three different phases of the growth period was used: growing cells; resting cells; dead or dried cells. Because of the low adsorption capacity of the non-viable activated sludge especially in the case of Pb(II) ions, biosorption of the Cu(II) and Pb(II) ions from the binary mixtures was carried out by using the resting cells. The biosorption data fitted better with the Freundlich adsorption isotherm model. Using a mathematical model based on continuous system mass balance for the liquid phase and batch system mass balance for the solid phase, the forward rate constants for biosorption of Pb(II) and Cu(II) ions were 0.793 and 0.242 1 (mmolmin)(-1), respectively.
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, 06532 Beytepe, Ankara, Turkey. yesims@hacettepe.edu.tr
Yeşim
Y
Sağ
Berya
B
Tatar
Tülin
T
Kutsal
D000327:Adsorption; D001673:Biodegradation, Environmental; D003300:Copper / Q000737:chemistry* / Q000302:isolation & purification; D007220:Industrial Waste; D007854:Lead / Q000737:chemistry* / Q000302:isolation & purification; D008962:Models, Theoretical; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid
D007220:Industrial Waste; D012722:Sewage; D007854:Lead; D003300:Copper