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In this research, we report a facile approach to synthesize NiO nano particles via simply sono chemical method, which revealed high proficiency and discrimination towards the adsorption of organic dyes. The structure and morphology of the nano particles were characterized by scanning electron microscopy (SEM) and fourier transform infrared (FTIR) spectroscopy. NiO nano particles were successfully employed as nano adsorbent for the treatment of congo red (CR) dye assisted simulated waste water under the influence of variable conditions to triumph best adsorption capacity. The effect of adsorbent amount, adsorbate concentration and stay time were analyzed. Adsorption isotherm models were also employed to analyze the practicability of the adsorption process. The adsorption results poved that the equilibrium data coincides very well with Langmuir and Freundlich isotherm, and the maximum adsorption propensities for Congo red (CR). The kinetic data can be interpreted by pseudo-second order model. The rational mechanism of adsorption attributed to hydrogen bonding, electrostatic attraction and ion \exchange between the dye molecules and NiO in the adsorption progression. These reutilizing methods effectively instigated at industrial scale and therefore assess the challenges pretended by them in the environment and community health.
Rosane Cavalcante Fragoso, Brasil
Chief Scientific Officer and Head of a Research Group
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