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Synthesis, Characterization and Experimental Studies of Nano Zn–Al–Fe3O4 Blended Alginate/Ca Beads for the Adsorption of Rhodamin B

Kumar, M., Vijayakumar, G., Tamilarasan, R.
Journal of polymers and the environment 2019 v.27 no.1 pp. 106-117
Fourier transform infrared spectroscopy, Gibbs free energy, adsorption, aqueous solutions, biodegradability, calcium, calcium chloride, enthalpy, entropy, equations, models, nanomaterials, polymerization, sodium alginate, temperature, thermogravimetry, toxicity
In the present study, adsorptive removal of rhodamin-B (RMN-B) from aqueous solution was investigated by using nano Zn–Al–Fe₃O₄ incorporated sodium alginate (SA) beads. SA is a natural polysaccharide, non toxic and biodegradable material. The incorporation of Zn–Al–Fe₃O₄ into SA was done by ionic polymerization method using CaCl₂. A batch mode study was used for the adsorption of RMN-B onto Zn–Al–Fe₃O₄/ alginate beads. The adsorption efficiency of RMN-B was investigated by the following modeling equations like Freundlich, Langmuir, Pseudo-first order, Pseudo-second order, Intraparticle diffusion, Gibbs free energy, Enthalpy and Entropy. The predicted experimental results of various modeling equations were implied that the process follow Langmuir and pseudo-second order equations. The intraparticle diffusion parameters indicate that the diffusion between RMN-B and nano beads were predominant in throughout of process. The surface morphology of nano beads of before and after adsorption were show that RMN-B is strongly adhered on whole surface of the nano material. The FTIR spectrum indicates that the RMN-B strongly adsorbed on the surface and TGA study reveals that the alginate/Zn–Al–Fe₃O₄/Ca material has an excellent temperature withstand capacity.