58 Poly(acrylamide-sepiolite) composite hydrogels: Preparation, swelling and dye adsorption properties

Author(s): Ekici, S; Isikver, Y; Saraydin, D

Title: Poly(acrylamide-sepiolite) composite hydrogels: Preparation, swelling and dye adsorption properties

Source: POLYMER BULLETIN, 57 (2): 231-241 JUN 2006

Language: English

Document Type: Article

Keywords Plus: INCORPORATED BENTONITE; MODEL-CALCULATIONS; IONIC SURFACTANTS; CATIONIC DYES; SEPIOLITE; GELS; WATER; MONTMORILLONITE; SILICATES; POLYMERS

Abstract: Polymer-clay hydrogel composite was prepared on the basis of polyacrylamide (PAAm) gel containing the clay mineral sepiolite. The properties of swelling and dye adsorption of poly(acrylamide-sepiolite) (AAm/Sep) composite hydrogel were investigated. The parameters of swelling and diffusion in water and dye solutions were calculated for the AAm and AAm/Sep hydrogels. It was found that the equilibrium swelling degree of obtained composite higher than that of AAm gel. Spectroscopic analysis of composite and composite-dye systems was done with FT-IR method. Adsorption of monovalent cationic dyes such as Basic Blue 12 (BB-12) Basic Blue 9 (BB-9), and Basic Violet 1 (BV-1), was studied on the composite. In the adsorption experiments, S (Sigmoidal) type for composite gel adsorption isotherms in the Giles classification system was found. Adsorption studies indicated that the amounts of adsorbed dyes on the AAm/Sep composite hydrogel were increased with following order; BB-12 > BB-9 > BV-1. The composite hydrogel may be considered as good candidate for environmental application to retain more water and dyes.

Addresses: Cumhuriyet Univ, Dept Chem, Hydrogeol Res Lab, TR-58140 Sivas, Turkey; Canakkale 18 Mart Univ, Dept Chem, Canakkale, Turkey

Reprint Address: Saraydin, D, Cumhuriyet Univ, Dept Chem, Hydrogeol Res Lab, TR-58140 Sivas, Turkey.

E-mail Address: saraydin@cumhuriyet.edu.tr

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Cited Reference Count: 26

Times Cited: 0

Publisher: SPRINGER

Publisher Address: 233 SPRING STREET, NEW YORK, NY 10013 USA

ISSN: 0170-0839

29-char Source Abbrev.: POLYM BULL

ISO Source Abbrev.: Polym. Bull.

Source Item Page Count: 11

Subject Category: Polymer Science

ISI Document Delivery No.: 044CH