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Removal of basic dyes from aqueous solutions using starch‐ graft ‐acrylic acid copolymers
Author(s) -
Güçlü Gamze,
Keleş Sibel
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26778
Subject(s) - copolymer , ceric ammonium nitrate , starch , adsorption , acrylic acid , aqueous solution , grafting , polymer chemistry , freundlich equation , chemistry , nuclear chemistry , acid dye , ammonium , organic chemistry , polymer , dyeing
Graft copolymerization of acrylic acid (AA) onto starch was carried out with ceric ammonium nitrate as initiator under nitrogen atmosphere. The grafting percentages (GP%) of starch‐ graft ‐AA (St‐ gr ‐AA) copolymers were determined. When the AA molar concentrations were 0.3 and 0.5 mol/L, GP% of St‐ gr ‐AA copolymers were 10.5% (St‐ gr ‐AA‐1) and 14% (St‐ gr ‐AA‐2), respectively. St‐ gr ‐AA copolymers have been used for the adsorption of basic dye (Safranine T) from aqueous solutions. Effects of various parameters such as treatment time, initial pH of the solution (pH = 2–6), initial dye concentration (50– 500 mg/L), and GP% of starch graft copolymers were investigated.Basic dye removal capacities of the copolymers increase along with the augment of initial concentration of the adsorbate, GP% of the copolymers, and pH. The adsorption capacities for St‐ gr ‐AA‐1 and St‐ gr ‐AA‐2 reach 116.5 and 204 mg/g, respectively. Equilibrium adsorption data were obtained and fitted very well to Freundlich model. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007