A Study on Using Natural Clay of Thanh Hoa Province for Removal of Cu(II) Ions From Aqueous Solution

In this study, natural clay of Co Dinh-Thanh Hoa Province (ĐS) and its composite with chitosan (CTS) obtained from shrimp shells have been ultilized as a low-cost and environmentally-friendly adsorbent for removal of Cu(II) ions from aqueous solution by the batch adsorption technique under different adsorption conditions. The prepared materials are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). The suitability of Langmuir and Freundlich isotherms to the equilibrium data for Cu(II) adsorption on ĐS and ĐS/CTS samples is investigated. The adsorption of ĐS is well fitted with Freundlich isotherm while the experimental data for the ĐS/CTS composite is best described by the Langmuir model. The result of this study also indicates that the prepared materials could be used as effective adsorbents for the removal of Cu(II) ions from industrial waste water, with maximum adsorption capacity of 44,1 mg/g and 56,8 mg/g for ĐS and ĐS/CTS, respectively