12 Behaviors of acrylamide/maleic acid hydrogels in uptake of some cationic dyes from aqueous solutions

Author(s): Saraydin, D; Karadag, E; Guven, O

Title: Behaviors of acrylamide/maleic acid hydrogels in uptake of some cationic dyes from aqueous solutions

Source: SEPARATION SCIENCE AND TECHNOLOGY, 31 (17): 2359-2371 1996

Language: English

Document Type: Article

Author Keywords: hydrogel; poly(acrylamide/maleic acid); swelling; adsorption; cationic dyes

Keywords Plus: BOVINE SERUM-ALBUMIN; ADSORPTION; N-VINYL-2-PYRROLIDONE; METHACRYLATE; BINDING

Abstract: Acrylamide/maleic acid (AAm/MA) hydrogels prepared by irradiating with gamma-radiation were used in experiments on swelling, diffusion, and uptake of some cationic dyes such as basic red 9 (BR-9), basic green 4 (BG-4), cresyl violet (CV), and basic blue 20 (BB-20). AAm/MA hydrogel containing 60 mg maleic acid and irradiated at 5.71 kGy has been used for swelling and diffusion studies in water and solutions of basic dyes. For this hydrogel, swelling studies indicated that swelling increased in the following order; BR-9 > BG-4 > CV > BB-20 > water. Diffusion of water and the dyes within hydrogels was found to be of a non-Fickian character. The uptake of the cationic dyes to AAm/MA hydrogels is studied by the batch adsorption technique at 25 degrees C. In the adsorption experiments, Langmuir-type adsorption in the Giles classification system was found. Some binding and thermodynamic parameters for AAm/MA hydrogel-dye systems were calculated by using the Klotz method. Adsorption studies indicated that monolayer coverages of AAm/MA hydrogel by these dyes increased in the following order: BB-20 > CV > BG-4 > BR-9.

Addresses: HACETTEPE UNIV,DEPT CHEM,TR-06432 BEYTEPE,ANKARA,TURKEY

Reprint Address: Saraydin, D, CUMHURIYET UNIV,DEPT CHEM,TR-58140 SIVAS,TURKEY.

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Cited Reference Count: 30

Times Cited: 16

Publisher: MARCEL DEKKER INC

Publisher Address: 270 MADISON AVE, NEW YORK, NY 10016

ISSN: 0149-6395

29-char Source Abbrev.: SEPAR SCI TECHNOL

ISO Source Abbrev.: Sep. Sci. Technol.

Source Item Page Count: 13

Subject Category: CHEMISTRY, MULTIDISCIPLINARY; ENGINEERING, CHEMICAL

ISI Document Delivery No.: VK805