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Sustainable development of a surface-functionalized mesoporous aluminosilicate with ultra-high ion exchange efficiency

Authors Hadi myavagh, Pejman HKUST affiliated (currently or previously)
Ning, Chao HKUST affiliated (currently or previously)
Kubicki, James D.
Mueller, Karl
Fagan, Jonathan W.
Luo, Zhengtang View this author's profile
Weng, Lutao HKUST affiliated (currently or previously)
McKay, Gordon View this author's profile
Issue Date 2016
Source Inorganic Chemistry Frontiers , v. 3, (4), April 2016, p. 502-513
Summary The present work employs a facile hydroxylation technique to efficiently functionalize the surface of a waste-derived aluminosilicate for ultra-high heavy metal uptake via ion exchange. The functionalization process leads to the transformation of a nonporous hydrophobic waste material to a mesoporous hydrophilic material with a high concentration of ion exchange sites. The modification of the surface and textural characteristics of the mesoporous aluminosilicate has been thoroughly elucidated. The functionalization brings about the partial depolymerization of the aluminosilicate network and the transformation of unreactive bridging oxygens (BO) into non-bridging oxygens (NBO) as active sites as evidenced by 29Si NMR and FTIR. The positively-charged alkali metals bound to the NBO act as facile ion exchange sites. Ultra-high heavy metal uptake capacity of the functionalized material through a combination of ion exchange and physisorption mechanisms has revealed the great potential of this aluminosilicate material for treatment of heavy metal-laden wastewater in a sustainable manner for practical applications.
ISSN 2052-1553
Language English
Format Article
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