In recent decades, enormous use of chromium in different industries as well as water and soil pollution by those industries caused serious concern. Toxic impact of chromium on the growth of plants includes changes in the process of germination and root, stem and leaves’ growth. Chromium also has harmful impact on the plants’ physiological processes such as photosynthesis. On the other hand, iro...

Herein we present a new approach for the complete removal of Cr(VI) species, through reduction of Cr(VI) to Cr(III), followed by adsorption of Cr(III). Reduction of chromium from water is an important challenge, as Cr(IV) is one of the most toxic substances emitted from industrial processes. Chitosan (CS) thin films were developed on plain polysulfone (PSf) and PSf/TiO2 membrane substrates by a...

Chromium (VI), also known as hexavalent chromium, is the second most stable oxidation state of chromium. Rarely occurring naturally, most chromium (VI) compounds are manufactured (products or by-products). Chromium (VI) can be reduced to the more stable chromium (III) in the presence of reducing agents (e.g. iron) or oxidizable organic matter (OSHA, 2006). Selected chemical and physical propert...

Iron(II) in buffer medium and in presence of oxalate has been proposed as a new electron transfer reagent or reducing agent for the selective determination of chromium(VI) in presence of several other metal ions such as Mo(VI), U(VI), V(IV) etc. The method consists in taking a chromium(VI) solution [ containing 3-11mg of Cr] into a buffer medium of pH ~ 4.05.2 containing about 0.040.10M potassi...

The redox reaction between CrO(4)(2-) and the fully reduced three-heme cytochrome c(7) from Desulfuromonas acetoxidans to give chromium(III) and the fully oxidized protein has been followed by NMR spectroscopy. The hyperfine coupling between the oxidized protein protons and chromium(III), which remains bound to the protein, gives rise to line-broadening effects on the NMR resonances that can be...

Water is second most essential for human being. Contamination of water makes it unsuitable for human consumption. Chromium ion is released to water bodies from various industries having high toxicity which affects the biota life in these waters. In this study aluminum oxide hydroxide was tested for its efficiency to remove trivalent chromium from aqueous solutions through batch mode experiments...

101 CHARACTERIZATION OF CHROMIUM(VI) BIOREDUCTION AND CHROMIUM(III) BINDING TO ALFALFA BIOMASS K. Dokken, G. Gamez, I. Herrera, K.J. Tiemann, N.E. Pingitore, R.R. Chianelli, and J.L. Gardea-Torresdey Department of Chemistry and Environmental Science and Engineering,University of Texas at El Paso, El Paso, TX 79968; Phone: (915) 747-5359; Fax: (915) 747-5847. Department of Geological Sciences, U...

This research aimed to quantify the speciation of chromium in different industrial effluent samples Hyderabad and Jamshoro, Pakistan. The hexavalent (Cr(VI)) was determined by microsample injection system flame atomic absorption spectroscopy (MIS-FAAS). total measured MIS-FAAS after oxidation trivalent (Cr(III)) Ce(SO4)2 an acidic medium (0.07 M H2SO4). content Cr(III) difference method (total ...

In the title compound, [Cr(C(2)H(6)OS)(6)]Cl(3), each Cr(III) ion is located on a three-fold inversion axis and is coordinated by six dimethyl-sulfoxide ligands [Cr-O = 1.970 (2)-1.972 (2) Å; O-Cr-O = 88.19 (9) and 91.81 (9)°] in a slightly distorted octa-hedral geometry. The Cl(-) anions take part in the formation of weak C-H⋯Cl hydrogen bonds, which contribute to the crystal packing stabiliza...

The kinetics of radiochromate-labeled was found to be about twice the size autologous blood lymphocytes were of the blood lymphocyte pool constudied in normal subjects. The labeled tamed within it and turned over cells equilibrated within hours with a through the blood about 12 times daily. recirculating lymphocyte pool (ALP) The labeled cells had an average half distributed between the blood, ...