REMOVAL of DYE POLLUTION by MODIFIED HALLOYSITE as ECO-FRIENDLY ADSORBENT
Abstract
In this study, the adsorption capacity of modified halloysite was systematically investigated with respect to temperature in a batch process. The halloysite mineral used in this work was alumina silicate mineral containing similarly structural layers. Halloysite mineral was obtained from Biga Peninsula, Western Anatolia. The characteristic properties of the modified halloysite were analyzed using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The modification process of the halloysite was achieved using a Cetyltrimethylammonium bromide (CTAB) aqueous solution. Methyl orange was used as a model dye to find out the adsorptive percentage capacity of the modified halloysite. It was found that the adsorptive capacity of clay was increased by increasing the contact time and decreasing with temperature. The thermodynamic parameters as Gibbs Free Energy (ΔGo), Enthalpy (ΔHo), Entropy (ΔSo) changes were calculated and the results showed that adsorption is exothermic and spontaneous. The unmodified-clay was used to compare the adsorptive property of the modified-clay for the methyl orange adsorption. The modified halloysite showed a better adsorptive capacity than the untreated halloysite for the adsorption of methyl orange.
Keywords
Adsorption,Halloysite,Methyl orange
Supporting Institution
Istanbul University-Cerrahpasa
Project Number
Project code: BAP-49753 (Project ID:2071).
Thanks
This work was supported by the Scientific Research Fund of the Istanbul University-Cerrahpaşa. Project code: BAP-49753 (Project ID:2071)
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