19 Adsorption of some anionic azo dyes onto crosslinked poly(N-vinylpyrrolidone) from aqueous solutions

Author(s): Saryadin, D; Karadag, E

Title: Adsorption of some anionic azo dyes onto crosslinked poly(N-vinylpyrrolidone) from aqueous solutions

Source: REVUE ROUMAINE DE CHIMIE, 43 (2): 139-148 FEB 1998

Language: English

Document Type: Article

Keywords Plus: BINDING; N-VINYL-2-PYRROLIDONE

Abstract: In this study, bindings of anionic azo dyes containing sulphonyl group such as acid red 26, acid red 103, direct yellow 9, acid black 1 and acid orange 52 onto crosslinked poly(N-vinylpyrrolidone) (CPVP) have been investigated. Adsorption of anionic azo dyes onto CPVf were studied by batch adsorption technique. In the experiments of adsorption, L (Langmuir) type adsorption in the Giles classification system was found. Binding parameters such as initial binding constant (K-i), equilibrium constant (K); monolayer coverage (n), site-size (u), maximum fractional occupancy (theta), and thermodynamic parameters such as heat of adsorption (Delta H), free energy of adsorption (Delta G) and entropy of adsorption (Delta S) for CPVP/anionic azo dye systems were calculated using Klotz method.

Addresses: Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey

Reprint Address: Saryadin, D, Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey.

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Cited Reference Count: 12

Times Cited: 0

Publisher: EDITURA ACADEMIEI ROMANE

Publisher Address: CALEA VICTORIEI 125, BUCHAREST 79717, ROMANIA

ISSN: 0035-3930

29-char Source Abbrev.: REV ROUM CHIM

ISO Source Abbrev.: Rev. Roum. Chim.

Source Item Page Count: 10

Subject Category: CHEMISTRY, MULTIDISCIPLINARY

ISI Document Delivery No.: ZT596