Zinc Adsorption Properties of Alginate-Sba-15 Nanocomposite

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.