Topic
Sodium dichromate
About: Sodium dichromate is a research topic. Over the lifetime, 421 publications have been published within this topic receiving 6202 citations. The topic is also known as: Disodium salt & sodium bichromate.
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TL;DR: It is concluded that L-band spectroscopy can indeed be effectively utilized for following the metabolism of Cr(V) in live mice and that Cr( V) formation can be controlled by utilizing cellular antioxidants in vivo.
30 citations
TL;DR: A model, which provides repetitive incubations in human upper aerodigestive tract mucosa cultures, may help to assess genotoxic hazards posed by environmental pollutants that have a cumulative character in repetitive or chronic exposure in vivo.
29 citations
TL;DR: In this paper, the effects of dichromate ion concentration, sulphuric acid concentration, temperature and the duration of the treatment on the stoichiometry of the reaction were examined.
29 citations
TL;DR: In this paper, the aqueous polymerization of m-methylaniline (mMA) was studied using sodium dichromate as oxidant in the presence of hydrochloric acid.
Abstract: The aqueous polymerization of m-methylaniline (mMA) was studied using sodium dichromate as oxidant in the presence of hydrochloric acid. The effect of hydrochloric acid, sodium dichromate and monomer concentration on the polymerization rate, specific viscosity of the obtained polymer and a.c.conductivity was investigated. The initial and overall reaction rates increase with the increase of hydrochloric acid concentration or sodium dichromate concentration but decrease with the increase of the monomer concentration. The specific viscosity values increase with increasing of hydrochloric acid concentration or monomer concentration, which means that the molecular weight of the polymer samples increases in the same direction. But the molecular weight decreases with the increase of sodium dichromate concentration. The highest a.c.conductivity value of the obtained polymer was found in case of using 0.023304 g mol/L of Na2Cr2O7 0.2 M HCI and 0.093225 M monomer solution in the reaction medium. The order ...
28 citations
TL;DR: In this article, the polarity of the electrodes at constant time intervals is reversed to minimize the adverse effects of the chromium hydroxide film, enabling the electrochemical reduction of nitrates and nitrites to proceed efficiently.
Abstract: Electrochemical reduction of nitrates and nitrites in alkaline media at constant current is rendered inoperable in the presence of hexavalent chromate. Even at chromate concentrations as low as 9mgdm−3, the chromium hydroxide film, formed by the reduction of chromate, interferes with the reduction of nitrate and nitrite. We show that reversing the polarity of the electrodes at constant time intervals minimizes the adverse effects of the chromium hydroxide film, enabling the electrochemical reduction of nitrates and nitrites to proceed efficiently. The optimum current and reversal time are coupled through an optimum charge density of 625Ccm−2 per cycle. We also demonstrate through long-term studies that the reversal technique can be operated on a continuous basis.
28 citations