Please use this identifier to cite or link to this item: https://open.uns.ac.rs/handle/123456789/792
Title: CaO&CaSO4 and CaO&Al2 (SO4)3 as pectin precipitants-model of overlapping diffuse layers
Authors: Kuljanin, Tatjana 
Filipović, Vladimir 
Nićetin, Milica 
Lončar (Ćurčić), Biljana 
Filipčev, Bojana 
Pezo, Lato
Issue Date: 2019
Journal: Periodica Polytechnica Chemical Engineering
Abstract: © 2019, Budapest University of Technology and Economics. All rights reserved. This work is concerned with the theoretical basis of novel sugar beet juice purification method using binary systems CaO&CaSO4 and CaO&Al2(SO4)3. The Gouy-Chapman-Stern (GCS) model of overlapping of diffuse layers of EDLs on pectin surface and that on Ca2+ and Al3+ ions, theoretically explains this method. The change of the zeta potential was used to quantitatively indicate overlapping of diffuse layers. For the experiment two model solutions of pectin (0.1 % w/w) were prepared, while the concentrations of CaO&CaSO4 and CaO&Al2(SO4)3 in the range of 50-500 g dm-3 were used. The greater decrease in the absolute value of zeta potential indicated greater overlapping of diffuse layers between pectin particles and Ca2+ and Al3+ ions and faster coagulation of pectin. The overlapping degree increased with increased concentration of these binary systems. Pectin with a greater surface charge and multivalent Al3+ from CaO&Al2(SO4), exerted a greater impact on the zeta potential. Optimal quantities of the applied binary mixtures were as follows: 256-640 mg g-1 pectin. This is much lower than CaO commonly used in the conventional process of sugar beet juice purification (about 9 g g-1 pectin).
URI: https://open.uns.ac.rs/handle/123456789/792
ISSN: 03245853
DOI: 10.3311/PPch.12320
Appears in Collections:TF Publikacije/Publications

Show full item record

Page view(s)

31
Last Week
9
Last month
2
checked on May 10, 2024

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.