Accession Number

VK805-0005

Document Delivery

VK805: Document Delivery available

Authors

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 & Technology. 31(17):2359-2371, 1996.

ISSN

0149-6395

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. [References: 30]

Language

English

Publication Type

Article

Subset

Current Contents/Physical, Chemical & Earth Sciences.

CC Categories

Chemistry.

Institution

Reprint available from:

Saraydin D

CUMHURIYET UNIV DEPT CHEM TR-58140 SIVAS TURKEY

HACETTEPE UNIV DEPT CHEM TR-06432 BEYTEPE  ANKARA TURKEY