The Removal of Cationic Dyes from Aqueous Solutions by Using Poly(N-Vinylpyrrolidone-co-Methacrylic Acid) Hydrogel Adsorbents: Effects of pH and Composition on Adsorption

TORUN M., ŞOLPAN ÖZBAY D.

FIBERS AND POLYMERS, vol.16, no.4, pp.735-743, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 4
  • Publication Date: 2015
  • Doi Number: 10.1007/s12221-015-0735-0
  • Journal Name: FIBERS AND POLYMERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.735-743
  • Hacettepe University Affiliated: Yes

Abstract

In this study, poly(N-vinylpyrrolidone-co-methacrylic acid) (P(VP/MAA)) hydrogels prepared with gamma-radiation were used for swelling, diffusion, and uptake of some cationic dyes which are Janus Green B (JGB) and Magenta (M). P(VP/MAA) hydrogels irradiated at 3.4 kGy were employed for swelling and diffusion studies in water and cationic dye solutions. The influence of dose, pH, relative amounts of monomers in VP/MAA monomer mixtures on swelling properties were investigated. P(VP/MAA) hydrogels were swollen in distilled water at pH 4.0, 7.0, and 9.0. P(VP/MAA) hydrogel containing 5 mole% methacrylic acid showed the maximum % swelling at pH 9.0 in water. Adsorption isotherms were plotted for JGB and M in P(VP/MAA) hydrogel systems. Consequently, it may be concluded that crosslinked P(VP/MAA) hydrogels may be successfully used in the purification of waste water containing certain textile dyes.