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Cite as: Rev. Chim.
https://doi.org/10.37358/Rev.Chim.1949

OSIM Nr. R102355
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Revista de Chimie (Rev. Chim.), Year 2015, Volume 66, Issue 4,





DANIELA ELENA PASCU, MIHAELA PASCU (NEAGU), GINA ALINA TRAISTARU, DANIELA FLORENTINA ENACHE, LUOANA FLORENTINA PASCU, MIHAELA EMANUELA CRACIUN
Models of Iron Adsorption by Two Types of Membranes

Abstract:

In this paper we intended to study the ability of iron adsorption from drinking water by two types of membranes: cellulose and composite. Adsorption studies were highlighted by means of adsorption isotherms: Langmuir, Freundlich, Flory-Huggins and Frumkin. The results revealed that iron adsorption was influenced by pH increase. The identification of iron in drinking water was done using two methods: spectrophotometric method and potentiometric redox titration with cerium sulphate method. The adsorption capacity of composite membrane increased when temperature was increased. Spectrophotometric method has proved to be better than potentiometric redox titration with cerium sulphate method. After 150 min was recorded the total iron removal from aqueous solution using the composite membrane. The pH value influenced significantly the adsorption capacity. As the pH increased, the adsorption capacity for both membranes decreased. Keywords: adsorption, isotherms, iron anion, mathematical modelling


Issue: 2015, Volume 66, Issue 4
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