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Removal of Cr(VI) from Aqueous Solution by Nanoscale Zero-Valent Iron

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The removal of Cr(VI) from aqueous solution using nanoscale iron particles was investigated. The effect of pH and temperature on Cr(VI) reduction was determined. The results showed that the removal efficiency of Cr(VI) increased with increase of the initial concentration of Cr(VI) from 1 to 10 mg/L. The removal process of Cr(VI) by nano-iron particles followed the first-order reaction kinetics and the rate constant was in the range of 0.164–0.184 min-1. The thermodynamic parameters, such as entropy (ΔS), free energy (ΔG) and enthalpy (ΔH) of Cr(VI) reduction by nano-iron particles were calculated. The reduction of Cr(VI) by nanoscale iron particles was spontaneous process.
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Keywords: Chromium; Heavy Metal; Kinetic; Nanoscale Iron; Thermodynamics

Document Type: Research Article

Affiliations: Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, P. R. China

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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