FIRAS HASHIM KAMAR, AHMED A. MOHAMMED, AYAD A.H. FAISAL, AURELIA CRISTINA NECHIFOR,GHEORGHE NECHIFOR BIOSORPTION OF LEAD, COPPER AND CADMIUM IONS FROM INDUSTRIAL WASTEWATER USING FLUIDIZED BED OF DRY CABBAGE LEAVES This study applies dry cabbage leaves as a biosorbent for the removal of Pb(II), Cu(II) and Cd(II) ions from aqueous effluents using fluidized bed column. The effects of different operating conditions such as: static bed height, superficial velocity and initial concentration for heavy metal ions on the removal efficiency were investigated. SEM images showed that dry cabbage leaves are having a good possibility for ions to be trapped and sorbed into these pores. FTIR analyses clarified that hydroxyl and carboxyl groups could be very effective for capturing these metals. The results show that a bed height of 4 cm, velocity of 1.1Umf and initial concentration for heavy metal ions of 50 mg/L are most feasible. An ideal plug flow model was adopted to characterize the fluidized bed reactor and solved numerically using MATLAB software, which fit well to the experimental breakthrough data. The breakthrough curves for single and multiple elements gave the order of biosorption capacity: Pb(II)>Cu(II)>Cd(II).
Keywords: biosorption, fluidized bed reactor, cabbage leaves, heavy metals ions