Organically functionalized mesoporous SBA-15 as sorbents for removal of selected pharmaceuticals from water

Tung Xuan Bui, Seo Young Kang, Sang-Hyup Lee, Heechul Choi

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Mesoporous silica SBA-15 and its postfunctionalized counterparts with hydroxymethyl (HM-SBA-15), aminopropyl (AP-SBA-15), and trimethylsilyl (TMS-SBA-15) were prepared and characterized by powder X-ray diffraction, N 2 adsorption-desorption measurement, Fourier-transform infrared spectroscopy, and elemental analysis. The removal of a mixture of 12 selected pharmaceuticals was investigated by batch adsorption experiments onto SBA-15 and the grafted materials. SBA-15 showed to have moderate adsorption affinity with amino-containing (atenolol, trimethoprim) and hydrophobic pharmaceuticals, but it displayed minimal adsorption affinity toward hydrophilic compounds. HM-SBA-15 was analogous with SBA-15 in terms of the adsorption efficiency toward all pharmaceuticals. AP-SBA-15 exhibited an increase in the adsorption of two acidic compounds (clofibric acid, diclofenac) but a decrease in the adsorption of estrone and the two amino-containing compounds. Among the grafted materials, TMS-SBA-15 had the highest adsorption affinity toward most pharmaceuticals. Moreover, the adsorption of nine pharmaceuticals to TMS-SBA-15 was significantly higher than that to SBA-15; seven of which showed the removal percentages from 70.6% to 98.9% onto TMS-SBA-15. The number of pharmaceuticals showing high adsorption efficiency onto TMS-SBA-15 did not alter significantly as the pH changed in the range of 5.5-7.6. The results suggest that TMS-SBA-15 is a promising material for the removal of pharmaceuticals from aqueous phase, especially for the treatment of wastewater from drug manufacturers.

Original languageEnglish
Pages (from-to)156-163
Number of pages8
JournalJournal of Hazardous Materials
Volume193
DOIs
Publication statusPublished - 2011 Oct 15

Fingerprint

Sorbents
Drug products
drug
adsorption
Adsorption
Water
Pharmaceutical Preparations
water
SBA-15
removal
Clofibric Acid
FTIR spectroscopy
X ray powder diffraction
Fourier transform infrared spectroscopy
Desorption
desorption
Trimethoprim
Wastewater
Atenolol
Estrone

Keywords

  • Adsorption
  • Functionalization
  • Mesoporous silica SBA-15
  • Pharmaceuticals
  • Trimethylsilyl groups

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

Cite this

Organically functionalized mesoporous SBA-15 as sorbents for removal of selected pharmaceuticals from water. / Bui, Tung Xuan; Kang, Seo Young; Lee, Sang-Hyup; Choi, Heechul.

In: Journal of Hazardous Materials, Vol. 193, 15.10.2011, p. 156-163.

Research output: Contribution to journalArticle

Bui, Tung Xuan ; Kang, Seo Young ; Lee, Sang-Hyup ; Choi, Heechul. / Organically functionalized mesoporous SBA-15 as sorbents for removal of selected pharmaceuticals from water. In: Journal of Hazardous Materials. 2011 ; Vol. 193. pp. 156-163.
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