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Ruma Bhattacharyya,Samit Kumar Ray 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
Several semi-interpenetrating network (Semi-IPN) hydrogels were synthesized by free radical copolymerization of acrylamide, hydroxyethyl methacrylate and N0N0-methylene bis acrylamide crosslinker (MBA) in presence of starch. These hydrogels were characterized by FTIR, DTA-TGA, XRD and SEM. The hydrogel showing the highest swelling% in water was used for removal of low (2.5–40 mg/L) and high (200–500 mg/L) concentration range of malachite green and methyl violet dyes from water. The hydrogel showed high adsorption for both of these dyes. Isotherms, kinetics, mass transfer coefficients and thermodynamics of dye adsorption were also studied.
Adsorption of industrial dyes by semi-IPN hydrogels of Acrylic copolymers and sodium alginate
Ruma Bhattacharyya,Samit Kumar Ray 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-
Several hydrogels were synthesized from sodium alginate and copolymer of acrylic acid and acrylamide. These hydrogels were characterized by FTIR, XRD, DTA-TGA, swelling and diffusion characteristics. Thehydrogel showing the best result for swelling was used for adsorption of Basic fuschin (BF) and Methylviolet (MV) dyes. The hydrogel showed high adsorption and removal% for these dyes for both low (2.5–25 mg/L) and high range (100–600 mg/L) of feed concentration. The dye adsorption data were fitted todifferent kinetics and adsorption isotherm models. The external mass transfer coefficient, diffusioncoefficient and thermodynamic parameters of dye adsorption were also determined.
Ruma Bhattacharyya,Samit Kumar Ray,Bidyadhar Mandal 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4
A systematic method was employed to synthesize several hydrogels by crosslink copolymerization of acrylamide (AM), hydroxyl ethylmethacrylate (HEMA) and N,N’-methylenebisacrylamide (NMBA) at varied operating conditions. Composite hydrogels were also prepared by in situ incorporation of varied amounts of sodium aluminosilicate filler to the monomer mixtures at optimum operating conditions. These hydrogels were used for removal of rhodamine B and methyl violet dye from water at low (0.5–3 mg/L) and high concentration (50–500 mg/L) ranges. The composite hydrogels showed much higher dye adsorption than the unfilled hydrogels. Kinetic, adsorption and thermodynamic parameters for dye adsorption were also evaluated.