Removal of dye by carboxymethyl cellulose, acrylamide and graphene oxide via a free radical polymerization process

• Published in: Carbohydrate polymers Vol. 164; pp. 186 - 194
• Main Authors: Varaprasad, Kokkarachedu, Jayaramudu, Tippabattini, Sadiku, Emmanuel Rotimi
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 15.05.2017
• Subjects: absorption; acrylamides; Carboxymethyl cellulose; carboxymethylcellulose; Dye removal; Fourier transform infrared spectroscopy; Graphene oxide; hydrocolloids; Hydrogels; industrial applications; polymerization; scanning electron microscopy; water purification; X-ray diffraction; Carboxymethyl cellulose; Graphene oxide; Dye removal; Hydrogels
• ISSN: 0144-8617; 1879-1344; 1879-1344
• DOI: 10.1016/j.carbpol.2017.01.094

•CMC-AM-GO hydrogels were prepared by a free radical polymerization method.•Graphene oxide was developed by the modified Hummers method.•CMC-AM-GO hydrogels exhibits super Case II diffusion transport mechanism.•The absorption capacities were 87.75–184.725mg/g for AB 113. Carboxymethyl cellulose has been used for the design of novel engineered hydrogels in order to obtain effective three-dimensional structures for industrial applications. In this work, dye removal carboxymethyl cellulose-acrylamide-graphene oxide (CMC-AM-GO) hydrogels were prepared by a free-radical polymerization method. The GO was developed by the modified Hummers method. The CMC-AM-GO and GO were characterized by FTIR, XRD and SEM. The swelling and swelling kinetics were calculated using gravimetric process. The kinetic parameter, swelling exponent values [n=0.59–0.7507] explained the fact that the CMC-AM-GO hydrogles have super Case II diffusion transport mechanism. CMCx-AM-GO (x=1–4) and CMC-AM hydrogels were used for removal of Acid Blue-133. The result explains that composite hydrogels significantly removed the acid blue when compared to the neat hydrogel. The maximum AB absorption (185.45mg/g) capacity was found in the case of CMC2-AM-GO hydrogel. Therefore, cellulose-based GO hydrogels can be termed as smart systems for the abstraction of dye in water purification applications.