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Title: Kinetics and equilibrium models for the sorption of tributyltin to nZnO activated carbon and nZnO / activated carbon composite in artificial seawater
Authors: Ayanda, Olushola Sunday 
Fatoki, Olalekan S 
Adekola, Folahan A 
Ximba, Bhekumusa J 
Keywords: Organotin;Tributyltin;Adsorption;nZnO;Activated carbon;GC-FPD
Issue Date: 2013
Publisher: Elsevier
Source: Ayanda, O.S., Fatoki, O.S., Adekola, F.A. & Ximba, B.J. 2013. Kinetics and equilibrium models for the sorption of tributyltin to nZnO, activated carbon and nZnO/activated carbon composite in artificial seawater. Marine Pollution Bulletin, 72(1): 222-230. []
Abstract: The removal of tributyltin (TBT) from artificial seawater using nZnO, activated carbon and nZnO/activated carbon composite was systematically studied. The equilibrium and kinetics of adsorption were investigated in a batch adsorption system. Equilibrium adsorption data were analyzed using Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D–R) isotherm models. Pseudo first- and second-order, Elovich, fractional power and intraparticle diffusion models were applied to test the kinetic data. Thermodynamic parameters such as ΔG°, ΔS° and ΔH° were also calculated to understand the mechanisms of adsorption. Optimal conditions for the adsorption of TBT from artificial seawater were then applied to TBT removal from natural seawater. A higher removal efficiency of TBT (>99%) was obtained for the nZnO/activated carbon composite material and for activated carbon but not for nZnO
ISSN: 0025-326X
Appears in Collections:Appsc - Journal Articles (DHET subsidised)
Prof. Bhekumusa Jabulani Ximba
Prof. Olalekan S. Fatoki

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