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메르캅토 기능기를 가진 실리카 나노 메조포러스 흡착제에 의한 유독성 중금속이온의 제거에 관한 연구
Study for Removal of Hazardous Heavy Metals by Mercapto Functional Silica nano Mesoporous Adsorbent
김정배 ( Jeung Bea Kim )
UCI I410-ECN-0102-2012-350-002038279

Mercapto-impregnated mesoporous silica has been developed for the removal of Hg(Ⅱ), Cd(Ⅱ) and Pb(Ⅱ) ions by adsorption. Mesoporous silica used for heavy metals adsorbents were prepared by co-condensation of surfactant as a template and Ludox HS-40 as a silica precursor. These materials have been characterized by elemental analysis, XRD, SEM and TEM analysis. To elucidate the surface characteristic of adsorbents, the zeta potentials were measured. As a result of zeta potential data, mesoporous silica indicated that the surface potentials seem to be dependent on the pH and the low negative charge showed in the range of all pH. Otherwise, the surface potentials of mercapto-impregnated mesoporous silica indicated that positive charge at the pH 3~8. Mercapto-impregnated mesoporous silica effectively removed Hg(Ⅱ) over 87 % from 40 ppm Hg aqueous solution at pH 6.2~6.5 and removed Cd(Ⅱ) over 81 % from 40 ppm Pb aqueous solution and removed Pb(Ⅱ) over 78%, respectively. The removal selectivity by the mercapto- impregnated mesoporous silica was in the order of Hg > Cd > Pb.

[자료제공 : 네이버학술정보]
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