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Central Composite Design Model to Study Swelling of GrA-cl-poly(AAm) hydrogel and Kinetic Investigation of Colloidal Suspension

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Abstract

In the present study, the flocculation behavior of crosslinked copolymer GrA-cl-poly(AAm) hydrogel has been studied for the removal of turbidity from waste water. Sodium borohydride has been used for the reduction of the Gum rosin acids by which it gets converted into rosin alcohols. The reduced Gum rosin alcohol was crosslinked by the use of MBA and copolymerized with acrylamide using KPS as a redox initiator. Synthesized sample was then optimized for reaction conditions like reaction time, reaction temperature and the amount of solvent, monomer concentration, initiator concentration and pH of the reaction medium in order to get maximum percentage swelling. Synthesized samples were characterized using Fourier transform infrared spectroscopy, scanning electron of microscopy and X-ray diffraction techniques. Response surface methodology (RSM) based central composite design was used to study the effect of pH of swelling medium and temperature to maximize the percentage swelling. A statistical model (ANOVA) predicted pH 7.0 and temperature 40 °C as optimum operating conditions in order to get maximu swelling. GrA-cl-poly(AAm) hydrogel was found to be pH and temperature sensitive. Kaolin has been employed as a coagulant. The flocculation efficiency of the synthesized polymer was studied as a function of polymer dose, temperature and pH of the solution. GrA-cl-poly(AAm) observed to show maximum flocculation efficiency (95%) with 70mgL−1 polymer dose in pH 5.0 at 30 °C. The adsorption capacity of malachite green dye removal (95%) was also studied with this synthesized polymer. The results validate that GrA-cl-poly(AAm) hydrogel has significant flocculation and dye removal properties and can be employed as an effective and low-cost material for removal of impurities from waste water.

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Acknowledgements

Authors are highly thankful to MHRD for providing financial assistance to carry out the research work. Authors are also thankful to DST-FIST for providing financial assistance for the procurement of equipment used in the characterization of the samples.

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  1. Department of Chemistry, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar, Punjab, 144011, India

    Rajeev Jindal, B. S. Kaith & Rachna Sharma

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  1. Rajeev Jindal
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  2. B. S. Kaith
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  3. Rachna Sharma
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Correspondence to Rachna Sharma.

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Jindal, R., Kaith, B.S. & Sharma, R. Central Composite Design Model to Study Swelling of GrA-cl-poly(AAm) hydrogel and Kinetic Investigation of Colloidal Suspension. J Polym Environ 26, 999–1011 (2018). https://doi.org/10.1007/s10924-017-1009-2

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