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The Adsorption of Polyvinylpyrrolidone on Kaolinite Saturated with Sodium Chloride

✍ Scribed by Lina İsrael; Çetin Güler; Hülya Yilmaz; Sönmez Güler

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
80 KB
Volume
238
Category
Article
ISSN
0021-9797

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✦ Synopsis

The adsorption of two different molecular weights of polyvinylpyrrolidone (PVP) (M(w)=44,000 and M(w)=360,000 g mol(-1)) from water on kaolinite saturated with sodium chloride has been studied. The adsorption of PVP increases slowly as temperature increases. The adsorption of PVP on the kaolinite was studied by considering Fourier transform infrared (FTIR) spectra, X-ray diffraction patterns, and dielectric constants. During the adsorption process, PVP interacts with saturating sodium cations and possibly forces some of them onto the edges of the kaolinite; thus, the dielectric constant of saturated kaolinite is reduced after PVP adsorption. Copyright 2001 Academic Press.

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