Journal ArticleDOI
Hexavalent chromium reduction using a fixed bed of scrap bearing iron spheres
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In this paper, the activation energy of the reaction was found to be 4.51 kcal/mol, which shows that the reaction is diffusion controlled, and the mass transfer coefficient was related to other parameters by simple equations.About:
This article is published in Desalination.The article was published on 2005-11-01. It has received 34 citations till now. The article focuses on the topics: Hexavalent chromium & Chromium.read more
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Hexavalent Chromium Reduction with Zero-Valent Iron (ZVI) in Aquatic Systems
TL;DR: In this paper, the authors provide updated information regarding the developments and innovative approaches in the use of zero-valent iron (ZVI) for the treatment of Cr(VI)-polluted waters.
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Physicochemical Technologies for Remediation of Chromium-Containing Waters and Wastewaters
Piyush Malaviya,Asha Singh +1 more
TL;DR: In this paper, a review aimed to provide a critical and qualitative picture of different physicochemical remediation technologies used for chromium removal along with some recent advancements achieved in this field.
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Photo-reduction of hexavalent chromium in aqueous solution in the presence of zinc oxide as semiconductor catalyst.
TL;DR: In this paper, the conversion of Cr(VI) to Cr(III) in an aqueous medium by photocatalytic reduction using UV radiation and ZnO semiconductor catalyst has been investigated using potassium dichromate as the model compound.
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Zinc oxide nano-particles--sonochemical synthesis, characterization and application for photo-remediation of heavy metal.
TL;DR: The synthesized nanoparticles were used for the photocatalytic reduction of hexavalent chromium in aqueous medium under solar radiation and it was observed that the initial reduction rates varied with the difference in morphology of ZnO crystallites.
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Hexavalent chromium reduction with scrap iron in continuous-flow system. Part 1 Effect of feed solution pH
Marius Gheju,A. Iovi,Ionel Balcu +2 more
TL;DR: The reduction of hexavalent chromium by scrap iron was investigated in continuous system, using long-term column experiments, for aqueous Cr(VI) solutions having low buffering capacities, over the pH range of 2.50-7.30.
References
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Book reviewA text-book of quantitative inorganic analysis: A. I. Vogel: (including elementary instrumental analysis). 3rd Ed. Longmans, Green, London, 1962. Pp.xxx + 1216 70s.
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Chromate removal from aqueous wastes by reduction with ferrous ion
L. E. Eary,Dhanpat Rai +1 more
TL;DR: Experimental measurements of reaction stoichiometries indicate that optimum conditions for chromate removal from oxygenated, 25/sup 0/C aqueous wastes by reduction with ferrous ion occur at pH less than 10.0, which is below the drinking water limit of 10/sup -6/ M.
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Kinetics of chromate reduction by ferrous iron
Scott Fendorf,Guangchao Li +1 more
TL;DR: This study used a stopped-flow kinetic technique monitored by UV−VIS spectroscopy and an initial rate method to ascertain the rate constant and the rate dependence of each reactant, and observed that Cr(VI) removal conformed to −d[Cr(VI)]/dt = kcr[Fe(II)]0.6.
A first course in electrochemical engineering
TL;DR: In this article, a mathematical approach was adopted to reconcile three sets of guidelines due to IUPAC (Physical Chemistry), EFChE (Working Party on Electrochemical Engineering) and (above all) consistency with D. Pletcher's sister book "A First Course on Electrode Processes".
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The kinetics of hexavalent chromium reduction by metallic iron
TL;DR: In this article, the rate reduction of hexavalent chromium (Cr(VI) by metallic iron under a range of conditions was studied in batch systems and the rate constant was evaluated and found to have a value of 5.45 × 10−5 1 cm−2 min−1.