Study on adsorption characteristic of carbonate hydroxylapatite for biphenol-A from aqueous solution
- Received Date: 03/02/2009
- Accepted Date: 11/01/2009
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Key words:
- carbonate hydroxylpatite /
- biphenol-A /
- adsorption mechanisms
Abstract: The adsorption of biphenol-A(BPA) from aqueous solution by home-made carbonate hydroxylapatite(CHAP) synthesized by using abandoned eggshell and urea was characterized by FT-IR,SEM and EDS. Factors that might influence the adsorption performance were investigated, such as pH values, adsorption period, biphenol-A initial concentration from aqueous solution.The results showed that absorption of biphenol-A on the CHAP was better pH=3~6 than pH>6 from aqueous solution. The equilibrium sorption datas could be described by the Langmuir and Freundlich isotherm models. The second-order kinetic model provided the best correlation of the used experimental data compared to the first-order kinetic model.