8 Adsorption of some basic dyes by acrylamide-maleic acid hydrogels

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

Title: Adsorption of some basic dyes by acrylamide-maleic acid hydrogels

Source: SEPARATION SCIENCE AND TECHNOLOGY, 31 (3): 423-434 1996

Language: English

Document Type: Article

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

Keywords Plus: BINDING; BLUE

Abstract: In this study, acrylamide-maleic acid (AAm/MA) hydrogels containing different quantities of maleic acid have been irradiated with gamma-radiation. They have been used in experiments on swelling, diffusion, and the adsorption of basic dyes such as methylene blue, methyl violet, and nile blue. Acrylamide-maleic acid hydrogel containing 40 mg maleic acid and irradiated at 3.73 kGy has been used for swelling and diffusion studies in water and solutions of basic dyes. For this hydrogel, maximum and minimum swellings have been observed with solutions of nile blue (2000% swelling) and water (1480% swelling). Diffusions of water and dyes within hydrogels have been found to be non-Fickian in character. In experiments on the adsorption of dyes, Type III adsorption has been found. One gram of AAm/MA hydrogel sorbed 0.3-2.2 mg of methylene blue, 0.3-3.4 mg of methyl violet, and 1.6-3.9 mg of nile blue, while acrylamide hydrogel has not sorbed any basic dye. This result shows that AAm/MA hydrogel can be used as a sorbent for water pollutants such as dyes, and immobilization of these organic contaminants in the hydrogels from wastewater can solve one of the most important environmental problems of the textile industry.

Addresses: HACETTEPE UNIV,DEPT CHEM,ANKARA 06532,TURKEY

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

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Cited Reference Count: 25

Times Cited: 31

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: 12

Subject Category: CHEMISTRY, MULTIDISCIPLINARY; ENGINEERING, CHEMICAL

ISI Document Delivery No.: TY651