47 Adsorption of methyl violet in aqueous solutions by poly(acrylamide-co-acrylic acid) hydrogels

Author(s): Solpan, D; Duran, S; Saraydin, D; Guven, O

Title: Adsorption of methyl violet in aqueous solutions by poly(acrylamide-co-acrylic acid) hydrogels

Source: RADIATION PHYSICS AND CHEMISTRY, 66 (2): 117127 FEB 2003

Language: English

Document Type: Article

Author Keywords: adsorption; dye; gamma-irradiation; hydrogel; acrylamide; acrylic acid

Keywords Plus: ACTIVATED CARBON; DYESTUFFS

Abstract: In this study, Acrylamide(AAm)/Acrylic Acid(AAc) monomer mixtures which contain different quantities of acrylic acid have been irradiated to form hydrogels with gamma-radiation. Acrylamide/Acrylic Acid (AAm/AAc) monomer mixtures which contain 15%, 20%, 30% AAm and irradiated with 8.0 kGy were used for swelling and diffusion studies in water and solutions of methyl violet. Diffusions of water and methyl violet within the hydrogels were found to be non-Fickian in character. In experiments on the adsorption of methyl violet, Type-S adsorption was found. Poly(AAm-co-AAc) hydrogel adsorbed methyl violet, while poly(AAm) hydrogel did not adsorb any dye. (DeltaH) Heat of adsorption, (DeltaG) Free energy of adsorption, (DeltaS) Entropy of adsorption were calculated. These results show that poly(AAm-co-AAc) hydrogels can be used as a sorbent for water pollutants such as dyes and treatment of these organic contaminants from wastewater. (C) 2003 Elsevier Science Ltd. All rights reserved.

Addresses: Hacettepe Univ, Dept Chem, TR-06532 Ankara, Turkey; Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey

Reprint Address: Solpan, D, Hacettepe Univ, Dept Chem, TR-06532 Ankara, Turkey.

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Cited Reference Count: 8

Times Cited: 1

Publisher: PERGAMON-ELSEVIER SCIENCE LTD

Publisher Address: THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

ISSN: 0969-806X

29-char Source Abbrev.: RADIAT PHYS CHEM

ISO Source Abbrev.: Radiat. Phys. Chem.

Source Item Page Count: 11

Subject Category: CHEMISTRY, PHYSICAL; PHYSICS, ATOMIC, MOLECULAR & CHEMICAL; NUCLEAR SCIENCE & TECHNOLOGY

ISI Document Delivery No.: 649QB