Adsorption equilibrium studies of zinc(II) by modifed chitosan flakes
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tuanhna@hcmute.edu.vnKeywords:
Zinc (II), modifed chitosan, adsorption isothermAbstract
Investigation of Zn(II) adsorption by the chitosan grafted with citric acid via crosslinking with glutraldehyde (C-Gch) was conduced by bath method. Effect of parameters such as pH, contact time, adsorbent dosage and other metal cations was determined. The maximum adsorption capacity of Zn(II) at pH 5 was found to be 82,5 mg Zn(II) /g C-Gch after 420 min of contact time.The equilibrium data were analyzed using Langmuir, Freundlich, Tempkin and Redlich-Peterson isotherm models. The equilibrium data were analysed using different error analysis equations. The models were found to be describing the data of C-Gch.
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