title: Equilibrium, thermodynamic and kinetic studies for the biosorption of aqueous lead(II), cadmium(II) and nickel(II) ions on Spirulina platensis.
abstract: The biosorption of lead(II), cadmium(II) and nickel(II) ions from aqueous solution by Spirulina platensis was studied as a function of time, concentration, temperature, repetitive reactivity, and ionic competition. The kinetic results obeyed well the pseudo second-order model. Freundlich, Dubinin Radushkevich and Temkin isotherm models were applied in describing the equilibrium partition of the ions. Freundlich isotherm was applied to describe the design of a single-stage batch sorption system. According to the thermodynamic parameters such as DeltaG degrees, DeltaH degrees and DeltaS degrees calculated, the sorption process was endothermic and largely driven towards the products. Sorption activities in a three metal ion system were studied which indicated that there is a relative selectivity of the biosorbent towards Pb2+ ions. The measurements of the repetitive reusability of S. platensis indicated a large capacity towards the three metal ions.
authors: Department of Chemistry, Izmir Institute of Technology, Urla 35430, Izmir, Turkey. aysegulseker@iyte.edu.tr
authors: Ayşegül
authors: A
authors: Seker
authors: Talal
authors: T
authors: Shahwan
authors: Ahmet E
authors: AE
authors: Eroğlu
authors: Sinan
authors: S
authors: Yilmaz
authors: Zeliha
authors: Z
authors: Demirel
authors: Meltem Conk
authors: MC
authors: Dalay
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000737:chemistry*; D007700:Kinetics; D007854:Lead / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D053545:Spirulina / Q000737:chemistry*; D013816:Thermodynamics; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium; D007854:Lead; D009532:Nickel