Use, Preparation, and Characterization of Copper-Containing Silica Gel

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Ulutan S., Demir A. P. T., Balköse D.

Industrial and Engineering Chemistry Research, vol.59, no.21, pp.9939-9949, 2020 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 59 Issue: 21
  • Publication Date: 2020
  • Doi Number: 10.1021/acs.iecr.9b06950
  • Journal Name: Industrial and Engineering Chemistry Research
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, Aqualine, Chemical Abstracts Core, Chimica, Compendex, Computer & Applied Sciences, zbMATH, DIALNET
  • Page Numbers: pp.9939-9949
  • Uşak University Affiliated: Yes

Abstract

The preparation and characterization of humidity-indicating silica gel containing copper sulfate were aimed at in the present study. The equilibrium and kinetics of Cu(II) sorption were investigated by contacting 200-1600 mg dm-3 Cu ion-containing solutions with silica hydrogel slabs having 10% silica. The diffusion coefficient of Cu(II) in silica hydrogel was determined to be on the order of 10-10 m2 s-1. X-ray diffraction indicated that the gels contained mainly CuSO4·3H2O, CuSO4·H2O, and small amounts of CuSO4 and CuSiO3·2H2O. The silica gel with Cu(II) can be used as a humidity indicator since its color changes from light blue to dark blue upon moisture adsorption.