Influence of co-cations on biosorption of lead and zinc – a comparative evaluation in binary and multimetal systems

• Published in: Bioresource technology Vol. 70; no. 3; pp. 269 - 276
• Main Authors: Puranik, P.R., Paknikar, K.M.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.12.1999; Elsevier Science
• Subjects: Binary and multimetal system; Biological and medical sciences; Biological treatment of waters; Biotechnology; Cation competition; Environment and pollution; Fundamental and applied biological sciences. Psychology; Industrial applications and implications. Economical aspects; Lead; Penicillium chrysogenum; Streptoverticillium cinnamoneum; Zinc; Lead; Binary and multimetal system; Cation competition; Streptoverticillium cinnamoneum; Zinc; Penicillium chrysogenum; Streptomycetaceae; Heavy metal; Biological purification; Actinomycetales; Fungi; Pollutant; Inorganic cation; Adsorption; Water pollution control; Bacteria; Actinomycetes; Molecular competition; Fungi Imperfecti; Bioremediation; Thallophyta
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/S0960-8524(99)00037-1

The influence of co-cations (cadmium, copper, cobalt and nickel) on lead and zinc biosorption by Streptoverticillium cinnamoneum and Penicillium chrysogenum in binary and multimetal systems was evaluated. The metal sorption capacity of S. cinnamoneum was higher than P. chrysogenum for all the metals tested. Both the biomasses exhibited preferential uptake of lead in a multimetal situation. Even though mutual inhibition was seen for all binary systems containing zinc, systems containing lead exhibited unequal inhibition. The extent of metal sorption was dependent on metal chemistry, affinity for binding sites and the type of metal binding. In multimetal systems, S. cinnamoneum and P. chrysogenum exhibited preferential sorption orders: Pb 2+ > Zn 2+=Cu 2+ > Cd 2+ > Ni 2+ > Co 2+ and Pb 2+ > Cu 2+ > Zn 2+ > Cd 2+ > Ni 2+ > Co 2+. The order of metal biosorption in a multimetal system could be predicted well on the basis of Langmuir parameters evaluated in binary metal systems.