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

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% sil...

Full description

Saved in:
Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 59; no. 21; pp. 9939 - 9949
Main Authors Ulutan, Sevgi, Demir, A. Pinar Tüzüm, Balköse, Devrim
Format Journal Article
LanguageEnglish
Published American Chemical Society 27.05.2020
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.9b06950