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Potassium dichromate

About: Potassium dichromate is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 18967 citations. The topic is also known as: Potassium dichromate(VI) & Chromium potassium oxide.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors studied the transport of Cr(VI) from aqueous solutions through bulk liquid membrane using p-tert-butylcalix[4]arene 3-diethylaminopropyl diamide derivative as a carrier.

38 citations

Journal ArticleDOI
TL;DR: In this article, the performance of potassium dichromate and potassium chromate inhibitors on the corrosion of steel rebar in concrete partially immersed in sulfuric acid and sodium chloride medium was investigated.
Abstract: This study investigated the performance of potassium dichromate and potassium chromate inhibitors on the corrosion of steel rebar in concrete partially immersed in sulfuric acid and sodium chloride medium. The open circuit potential corrosion monitoring technique was employed for the acidic and marine simulating environments, and potential readings were taken in accordance with ASTM C 876. Inhibiting quality and uniformity of the inhibitors were then analyzed using an extreme value statistical modeling approach of the Weibull probability density distribution for determining the most efficient inhibitor. In the inhibitor concentrations used, the statistically analyzed experimental results identified 0.145 M potassium chromate as exhibiting the best inhibiting quality in sulfuric acid whereas the synergetic admixture of 0.032 M potassium dichromate and 0.097 M potassium chromate was predicted as showing the lowest probability of corrosion risk in sodium chloride solution. However, the overall probabilistic results rated potassium chromate as the best inhibitor compared to potassium dichromate in most of the other concentrations investigated in the study, especially in concrete structures exposed to saline environments.

37 citations

Journal ArticleDOI
TL;DR: Potassium dichromate was the most potent agent for induction of gene conversion and reverse mutation, and cobalt chloride was the least toxic, exhibited a convertogenic activity but was only marginally active for reverse mutation.
Abstract: 4 metal salts, potassium dichromate, sodium arsenite, cobalt chloride and lead nitrate were tested for their genotoxic effects in Saccharomyces cerevisiae Potassium dichromate was the most potent agent for induction of gene conversion and reverse mutation Sodium arsenite was virtually ineffective as a convertogen but gave a positive result for reversion Cobalt chloride was the least toxic, exhibited a convertogenic activity but was only marginally active for reverse mutation Lead nitrate was the most toxic salt but was genetically inactive

37 citations

Journal ArticleDOI
TL;DR: Results are consistent with previous data, showing that hexavalent chromium and either benzo[a]pyrene or cigarette smoke condensate behave antagonistically in in vitro mutagenicity test systems and that the chromium reducing capacity of human pulmonary alveolar macrophages and peripheral lung parenchyma is enhanced in smokers.
Abstract: A combination of tobacco smoking with certain agents has been shown to exert synergistic carcinogenic effects. On the other hand, antagonism betweeen smoke and other pulmonary carcinogens has also been documented by both epidemiological and experimental data. In spite of a very large number of studies carried out for decades in workers exposed to hexavalent chromium, the influence of smoking habits on lung carcinogenesis induced by this metal has not been clarified. For this reason, we performed two studies evaluating clastogenic effects in rodents. In the first one, BDF(1) mice were exposed whole-body to mainstream cigarette smoke for 5 days and, on the last day, they received an i.p. injection of potassium dichromate. In the second study, Sprague-Dawley rats were exposed whole-body to environmental cigarette smoke for 18 consecutive days and for the same period of time they received daily intra-tracheal instillations of sodium dichromate. Individually, the two hexavalent chromium salts and cigarette smoke, either mainstream or environmental, enhanced the frequency of micronuclei in bone marrow polychromatic erythrocytes of both mice and rats. Moreover, individual exposure to either environmental cigarette smoke or sodium dichromate enhanced the frequency of micronuclei and multiple nuclei in pulmonary alveolar macrophages of rats. In both studies, combined exposure to cigarette smoke and hexavalent chromium produced less than additive clastogenic effects. These results are consistent with our previous data, showing that hexavalent chromium and either benzo[a]pyrene or cigarette smoke condensate behave antagonistically in in vitro mutagenicity test systems and that the chromium reducing capacity of human pulmonary alveolar macrophages and peripheral lung parenchyma is enhanced in smokers. Taken together, in the absence of any epidemiological evidence, these findings rule out any occurrence of synergism between cigarette smoke and hexavalent chromium, at least in certain stages of the carcinogenesis process.

37 citations

Journal ArticleDOI
W.O. Berndt1
TL;DR: The effects on uptake of organic compounds, potassium dichromate, whether administered to the intact animal or added to the extra-cellular fluid compartment, caused a decrease in the intracellular concentration of potassium and an increase in the intrusion concentration of sodium.

37 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202326
202256
202119
202020
201931
201844