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The reduction of chromate ions by Fe(II) layered hydroxides
chromate ions Fe(II) layered hydroxides
2009/5/27
The reduction of chromate ions by Fe(OH)2 and the iron (II)-iron (III) hydroxysulphate green rust, GR(SO42-), was studied to evaluate whether such synthetic layered hydroxides and the corresponding na...
Application of Potassium Chromate-Diphenylcarbazide in the Quantitative Determination of Ascorbic Acid by Spectrophotometry
Ascorbic acid determination Spectrophotometry Potassium chromate Chromium-diphenyl-carbazide complex
2010/4/21
A spectrophotometric procedure for the determination of ascorbic acid in pure form and in a number of pharmaceutical preparations and real samples has been developed that offers the advantages of simp...
Adsorption of Arsenate and Chromate from Waters on Hydrophobized Zeolitic Media
Octadecylammonium-clinoptilolite adsorption anion-exchange chromate and arsenate oxyanions montmorillonite
2010/4/21
A laboratory setup was used to examine the uptake of chromate and arsenate from aqueous solutions by octadecylammonium acetate [ODA]-modified inland clinoptilolite. In trials, a natural variety of mon...
Chromate Removal by Dithionite-Reduced Clays: Evidence from Direct X-Ray Adsorption Near Edge Spectroscopy (Xanes) of Chromate Reduction at Clay Surfaces
Illite IMt-2 Kaolinite KGa-2 Montmorillonite Reduction Smectite Sorption SWa-1 SWy-1 XANES
2011/12/6
Abstract: Chromium(VI) in the environment is of particular concern because it is toxic to both plants and animals, even at low concentrations. As a redox-sensitive element, the fate and toxicity of ch...
Chromate (CrO42-) adsorption was investigated on kaolinite (0.2? 祄) saturated with NaClO4 over a range of pH. Adsorption increased with decreasing pH because of protonation of chromate and/or variable...