Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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Waste glass powder/activated carbon composite as a new green adsorbent for the removal of heavy metals from polluted water and industrial wastewater
Mohamed Nageeb Rashed, A.lia AbdElmiaam Gad, AbdEldaiem Mohamed AbdEldaiem

Last modified: 2015-08-15

Abstract


Glass waste disposal causes environmental problems in the cities. To find suitable green environmental solution for this problem we used the glass waste as adsorbent alone or as composite with activated carbon for removal of heavy metals from polluted water and industrial wastewater. Water pollution with heavy metal has become one of the most environmental problems nowadays.  An effective new green composite adsorbents were synthesized by chemical, mechanical, and hydrothermal treatments of waste glass powder (GP) and nano activated carbon(AC).   The ability of those new adsorbents for heavy metal (Cd,Cu, Fe, Pb and Zn)  removal was evaluated. The adsorbents were characterized by scanning electron microscopy (SEM), XRF and XRD. Batch experiments were conducted to test the ability of the new composite for the removal of Cd, Cu, Fe, Pb and Zn from polluted water and industrial wastewater. Various ratios of GPto AC composites (2 AC+3GP, 1 AC+3 GP,  5 AC+3GP  ) were prepared. The experiments of the heavy metals adsorption by adsorbents were performed at different metal ion concentrations, solution pH, adsorbent dosage and contact time. The Langmuir and Freundlich adsorption isotherms were used to verify the adsorption performance. The results indicated  high removal efficiencies ( 99- 100%) for all the studied heavy metals with composite (1AC+3GP) at pH 7 and keeping contact time to  2 h . The data obtained from adsorption isotherms of metal ions at different time fitted well to linear form of Langmuir sorption equation.