నైరూప్య

Preparation of low-cost adsorbent from waste glass for the removal of heavy metals from polluted water.

Nageeb Rashed M, Gad AA, AbdEldaiem AM

Water pollution with heavy metals has become one of the most environmental problems nowadays. To find a suitable green environmental solution for this problem low cost adsorbent in this study was prepared from waste glass. An effective new green adsorbent was synthesized by hydrothermal treatment of waste glass, followed by acidic activation of its surface by HCl. The prepared adsorbent was characterized by SEM, XRF, XRD, and BET surface measurement. Batch experiments were conducted to test the optimum conditions of the prepared adsorbent for the removal of Cd, Cu, Fe, Pb and Zn from their solutions. The experiments of the heavy metals adsorption by the developed adsorbent were performed at different metal ion concentrations, solution pH, adsorbent dosage and contact time. Langmuir and Freundlich adsorption isotherms and kinetic models were used to verify the adsorption performance. The results indicated high removal efficiencies (99-100%) for all the studied heavy metals at pH 7 and a constant contact time 2 h. The data obtained from adsorption isotherms of the metal ions at different times fitted well to linear form of the Langmuir sorption equation, and pseudo-second-order kinetic model. Application of the resulted conditions on well water demonstrated that the modified waste glass adsorbent successfully adsorbed heavy metals (Cd, Cu, Fe, Pb and Zn) from its.