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۱Zinc Adsorption Properties of Alginate–SBA–15 Nanocomposite
نویسنده(ها): ،
اطلاعات انتشار: International Journal of Engineering، بيست و هشتم،شماره۱۰، Oct ۲۰۱۵، سال
تعداد صفحات: ۸
Assessment of adsorption zinc (II) ions from aqueous solution using alginate–SBA–15 sorbent nanocomposite was investigated as a function of zinc concentration, solution pH, and contact time. For that purpose, the alginate–SBA–15 nanocomposite adsorbent was prepared through encapsulation method by immobilization mesoporous SBA–15 into a polymeric matrix. Identification of functional groups and surface morphology of the obtained nanocomposite was carried out by X–Ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and nitrogen porosimetry experiments. Sorption performance of the alginate–SBA–15 adsorbent during batch experiments was studied. A mathematically explanation of adsorption process using kinetics and isotherm models was also performed. Kinetic study was revealed that the pseudo second–order model has good agreement with the experimental results than the pseudo first–order model. Therefore, it indicates that the concentration of both alginate–SBA–15 and zinc metal ions are involved in the rate determining step of the sorption process. The qmax value for zinc (II) ions adsorption onto alginate–SBA–15 was found 46.3 mg g–1. According to thermodynamic analysis, physisorption and the endothermic of the sorption process nature of Zn(II) ions onto alginate–SBA–15 nanocomposite was revealed.
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