Advanced mesoporous organosilica material containing microporous beta-cyclodextrins for the removal of humic acid from water.
J Chromatogr A
; 1036(2): 113-8, 2004 May 21.
Article
em En
| MEDLINE
| ID: mdl-15146911
ABSTRACT
A new mesoporous organosilica material (beta-CD-Silica-4%) containing microporous beta-cyclodextrins (beta-CDs) has been prepared by the co-polymerization of a silylated beta-CD monomer with tetraethoxysilane in the presence of a structure-directing template, cetyltrimethylammonium bromide. Solid-state 13C and 29Si NMR studies provided evidence for the presence of covalently attached beta-CDs in the mesoporous material. Nitrogen adsorption experiments showed that beta-CD-Silica-4% material had a BET surface area of 460 m2/g and an average mesopore diameter of 2.52 nm. Small-angle powder X-ray diffraction pattern of beta-CD-Silica-4% material revealed the lack of highly ordered mesoporous structure. Adsorption experiments showed that beta-CD-Silica-4% material removed up to 99% of humic acid from an aqueous solution containing 50 ppm of humic acid at a solution-to-solid ratio of 100 ml/g.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Água
/
Dióxido de Silício
/
Beta-Ciclodextrinas
/
Substâncias Húmicas
Idioma:
En
Revista:
J Chromatogr A
Ano de publicação:
2004
Tipo de documento:
Article