Research on adsorption of Cd2+ by hydroxyapatite/chitosan nanocomposite

Duyen Le Thi, Hanh Vo Thi, Dung Cong Tien, Thanh Dinh Thi Mai

Abstract


Hydroxyapatite/chitosan nanocomposite (n-HAp/ChS) was synthesized successfully from 0.5 M Ca(NO3)2 + 5 % chitosan/2 % acetic acid solution and 0.3 M (NH4)2HPO4 solution at pH 10-11 using 28 % NH3 solution by chemical precipitation method. n-HAp/ChS was used for the adsorption of Cd2+ from aqueous solution. The effect of factors on the Cd2+ adsorption efficiency and capacity was investigated. The adsorption efficiency and capacity obtained 97,75 % and 58,65 mg/g respectively at suitable condition: pH0 5.9,n-HAp/ChS mass of 0.1 g, initial Cd2+ concentration of 60 mg/L, contact time 40 minutes at room temperature (30oC). The experimental data was described by Langmuir and Freundlich isotherm models.

Keywords


hydroxyapatite/chitosan; nanocomposite; adsorption of Cd2+

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References


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DOI: https://doi.org/10.51316/jca.2021.025

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