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Öğe Biosorption of copper(II) on immobilised Synechocystis aquatilis(Parlar Scientific Publications (P S P), 2006) Ergene, A.; Tan, S.; Katircioglu, H.; Öktem, Z.Synechocystis aquatilis was immobilized in Ca-alginate via entrapment. The plain alginate, and alive and heat-inactivated immobilized algae beads were used for the sorption of Cu2+ ions from aqueous solutions at 25 degrees C. Kinetic studies showed a fast initial rate, followed by a slower biosorption one. Adsorption of Cu2+ on the biosorbents increased with increasing initial Cu2+ ions level in the solution. The heat-inactivated alga preparation showed a higher biosorption capacity than the alive counterpart. The biosorption equilibrium was established approx. in 3 h, and the equilibrium was well-described by the Langmuir and Freundlich adsorption isotherms. The effect of pH was also investigated and the maximum adsorption of Cu2+ ions on the biosorbents was obtained approx. at pH 5.6.
