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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.


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Journal ArticleDOI
TL;DR: The effects of hexavalent chromium on the cell growth of green paramecium, Paramecium bursaria, were investigated and indicated the possibility of the use of P. Bursaria as a biomonitor and bioaccumulator for chromium contaminants in aquatic environments.
Abstract: The effects of hexavalent chromium on the cell growth of green paramecium, Paramecium bursaria (P. bursaria), were investigated in this study. Two strains (MB-1 and F1 generation) of P. bursaria were incubated in lettuce media supplemented with different concentrations of potassium dichromate under LL (24 hr light), LD (12 hr light : 12 hr dark) and DD (24 hr dark) conditions, and the IC50 values were obtained. The IC50 7-day value showed that the toxicity of potassium dichromate was light-sensitive in both strains of P. bursaria. The results of the toxic effect of chromium on the cell shape of P. bursaria (BWK-4) showed that the body ratio of P. bursaria increased, even if the cells were incubated for 24 hr with 0.5 µM potassium dichromate solution, indicating that the cell shape of P. bursaria is very sensitive to potassium dichromate. The average amount of chromium accumulated in green paramecium ranged from 1.72 to 15.5 pg Cr/cell in a time- and concentration-dependent manner. This finding indicates the possibility of the use of P. bursaria as a biomonitor and bioaccumulator for chromium contaminants in aquatic environments. The experiment with electrical stimuli into the culture of P. bursaria indicated that cells accumulated at the negative electrode, suggesting that P. bursaria carried a positive charge. Thus, because the positive charge does not cause any significant absorption of chromium into the cells, P. bursaria may develop a variety of mechanisms for chromium accumulation in the cell. Further research studies are required to elucidate the mechanism of chromium uptake in P. bursaria.

18 citations

Journal ArticleDOI
TL;DR: In this article, the removal of chromium from synthetic waste streams was studied using biofilms that developed on disks of a laboratory scale Rotating Biodisk Contactor (RBC).
Abstract: Removal of chromium from synthetic waste streams was studied using biofilms that developed on disks of a laboratory scale Rotating Biodisk Contactor (RBC). During its development the biofilm was continuously exposed to various concentrations of potassium dichromate. Chromium removal efficiency was about 98% during steady state addition of chromium (VI) at concentrations of 100 or 200 mg l‐1. Analysis of the major soluble chromium ions demonstrated that chromium (VI) was first reduced to chromium (III) which then appeared to be adsorbed by the biofilm. Chromium levels associated with the biofilm were found (by chemical analysis) to be 6.5–7.0% of its dried weight.

18 citations

Journal ArticleDOI
TL;DR: The effects of hexavalent chromium in the haemolymph cells of Procambarus clarkii are investigated using the micronuclei (MN) test using the objective of developing a field-assay for the detection of genotoxic pollutants in water.

18 citations

Journal ArticleDOI
TL;DR: Dietary administration of black tea infusion could significantly protect against clastogenic activity of chromium compounds though it was itself mildlyClastogenic, as compared with those of the control in distilled water.

18 citations

Journal ArticleDOI
TL;DR: Calcium-EDTA therapy had no influence on erythrocyte, serum, or urine chromium level, but contributed, however, to a significant increase in chromium elimination rate in the dialysate.
Abstract: Case Report: A 48-year-old man drank 150 mL of an aqueous solution containing potassium dichromate 22.5 g in a suicidal attempt and was admitted 7 hours after the ingestion. Hemodialysis was promptly undertaken and chromium concentrations in serum, erythrocytes, and dialysate were determined during the treatment. Chromium elimination in urine was monitored during hemodialysis and the subsequent 400 hours. The total chromium eliminated via hemodialysis and urine was calculated as 36.7 mg or 0.16% of the ingested dose. Spontaneous urinary elimination proceeded according to an open one-compartment model. The elimination half-life was 71.37 hours ± 17.13 hours (95% CI). Chromium elimination from serum followed an open two-compartment model, with the half-lives of 3.16 hours ± 2.63 hours for phase 1 and 50 hours ± 27 hours (95% CI) for phase 2. Calcium-EDTA therapy had no influence on erythrocyte, serum, or urine chromium level. It contributed, however, to a significant increase in chromium elimination rate in...

18 citations


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