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Anions effects on biosorption of Mn by extracellular polymeric substance from Rhizobium etli

, : Anions effects on biosorption of Mn by extracellular polymeric substance from Rhizobium etli. Biotechnology Letters 25(15): 1267-1270, August

Microbial extracellular polymeric substances (EPS) are potential biosorbents for metal remediation and recovery. The Langmuir and Freundlich kinetics of Mn(II) binding by the EPS from a novel Mn(II) oxidising strain of Rhizobium etli were determined. Maximum manganese specific adsorptions (qmax) decreased in the sequence: sulphate (62 mg Mn per g EPS)>nitrate (53 mg g-1)>chloride (21 mg g-1). Consideration of the anion during kinetic studies is usually neglected but is important in providing more practical and comparable data between different biosorbent systems.


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