Adsorption of aniline onto hexagonal mesoporous silicate monoliths (HOM-2)

Sherif A. El-Safty, Fujio Mizukami, Takaaki Hanaoka

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Hexagonally highly ordered monolithic mesoporous silica and aluminosilicate composites (HOM-2 and Al/HOM-2, respectively) were used as adsorbents for removal of aniline in aqueous solution. These HOM-adsorbents were fabricated by using a simple, reproducible and direct synthesis strategy in which instantly preformed liquid crystalline phase of Brij 56 (C16EO10) surfactant was used as templates. Extensive characterisation studies showed that Al/HOM-2 composites revealed higher surface area, smaller pore sizes and thicker pore wall than those of unloaded-HOM-2 monoliths, indicating that Al might be impregnated into the inner pores and the wall frameworks of HOM-2 silica monoliths. The adsorption experiments of aniline were investigated by using batch techniques. The results obtained showed that the aniline molecule strongly adsorbed onto the aluminosilicate mesostructures. In addition, the HOM-adsorbent exhibited high efficiency for aniline removal after several uses without loss of structural ordering, permitting the reusability for further selective separation of organic molecules from water.

Original languageEnglish
Pages (from-to)97-110
Number of pages14
JournalInternational Journal of Environment and Pollution
Volume34
Issue number1-4
Publication statusPublished - 2008 Oct
Externally publishedYes

Keywords

  • Aluminosilicates
  • Aniline solute
  • Hexagonal structures
  • Mesoporous silica
  • Monolithic-adsorbents
  • Water treatments

ASJC Scopus subject areas

  • Pollution
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law

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