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Kinetics and Thermodynamics Studies of the Nitrate Reduction Using Zero Valent Iron Nanoparticles Supported on Nanographene

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In this manuscript, zero valent iron nanoparticles were synthesized and supported onto high surface area nanographene forming stable ZVINP/NG nanocomposite and used for nitrate catalytic reduction. The effect of nitrate concentration, solution's temperature, and interfering ions on the reduction of nitrate were studied. The catalytic reduction reaction of nitrate by the ZVINP/NG nanocomposite was studied kinetically using different kinetics models, and results showed that the pseudo-second order model converged very well and could describe the reaction with good regression coefficient. On the other hand, the thermodynamics study showed the negative value of ΔG, and positive values of ΔH and ΔS, indicating that the catalytic reduction of nitrate by the ZVINP/NG nanocomposite is product-favored spontaneous reaction, and entropy-driven process. Finally, the applicability of ZVINP/NG nanocomposite for the removal of nitrate was studied using different real samples, and the results showed the great efficiency of the ZVINP/NG nanocomposite for the removal of nitrate ions.
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Keywords: CATALYSIS; KINETICS; NANOGRAPHENE; NITRATE; REDUCTION; THERMODYNAMICS; ZERO VALENT IRON NANOPARTICLES

Document Type: Short Communication

Publication date: March 1, 2017

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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