Cerium binding activity of different pectin compounds in aqueous solutions

Cerium binding activity of different water soluble pectin compounds varying according to their degree of esterification and insoluble calcium pectate beads in aqueous solution was studied in a batch sorption system. The cerium uptake by all pectin compounds was highest within the pH range from 4.0 t...

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Bibliographic Details
Published in:Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2010-05, Vol.77 (1), p.104-110
Main Authors: Khotimchenko, Maxim Y., Kolenchenko, Elena A., Khotimchenko, Yuri S., Khozhaenko, Elena V., Kovalev, Valeri V.
Format: Article
Language:English
Subjects:
Cerium
Cerium - chemistry
Degree of esterification
Equilibrium study
Esterification
Models, Chemical
Pectin
Pectins - chemistry
Solutions
Thermodynamics
Wastewater
Water
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Summary:Cerium binding activity of different water soluble pectin compounds varying according to their degree of esterification and insoluble calcium pectate beads in aqueous solution was studied in a batch sorption system. The cerium uptake by all pectin compounds was highest within the pH range from 4.0 to 6.0. The binding capacities and rates of cerium ions by pectin compounds were evaluated. The Langmuir, Freundlich and BET sorption models were applied to describe the isotherms and constants. Sorption isothermal data could be well interpreted by the Langmuir equation. The results obtained through the study suggest that pectin compounds are favorable sorbents. The largest amount of cerium ions is bound by pectin with the degree of esterification close to zero. Therefore, it can be concluded that low esterified pectins are more effective substances for elimination of cerium ions from aqueous disposals.
ISSN:0927-7765
1873-4367
DOI:10.1016/j.colsurfb.2010.01.015