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The current studies emphasises the synthesis of SnO-CoO nanocomposites by bottom up approach adopting sol gel method. These nano particles were effectively employed as nano adsorbent for the treatment of tartrazine (TR) dye assisted simulated waste water under the influence of variable conditions to achieve best adsorption capacity. The effect of adsorbent amount, adsorbate concentration, stay time and pHpzc were studied. Adsorption isotherm models of Langmuir, Freundlich, Dubinin Radushkevich and Temkin were also employed to check the feasibility of the adsorption process. Adsorption capacities ‘KF’ of the adsorbent were determined at 298K, 313K and 323K respectively. Thermodynamic studies were conducted and the values of ∆Ho and ∆So were found to be 3113.32 J. mole-1 and 56.712 J.mole-1K-1 respectively. The spontaneity of adsorption process was affirmed by ∆Go values. The experimental data was also fitted to various kinetic equations to determine rate constant and order of the reaction like pseudo first order and pseudo second order, intraparticles diffusion model, Boyd’s kinetics model and Elovich model. The adsorption data represent pseudo second order kinetics is followed with the major mode mass transfer mode to be diffusion. The surface morphology of nanocomposites was studied by SEM and FTIR techniques. Such recycling methods effectively implemented at industrial scale and therefore assess the challenges posed by them in the environment and public health.
Rosane Cavalcante Fragoso, Brasil
Chief Scientific Officer and Head of a Research Group
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