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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: The decrease in extracellular and intracellular hexavalent chromium concentration, the induction of heme oxygenase 1, and the ability to scavenge reactive oxygen species and peroxynitrite are involved in the mechanism by which stannous chloride protects proximal tubular epithelial cells from potassium dichromate-induced toxicity.
Abstract: The exposure to hexavalent chromium is often known to cause acute renal failure. It has been found that nonenzymatic antioxidants and the induction of heme oxygenase 1 have protective effects against nephrotoxicity induced by potassium dichromate in vivo. In this work, the effect of stannous chloride, an inducer of heme oxygenase 1, on potassium dichromate-induced toxicity in proximal tubular epithelial cells was studied. Hexavalent chromium levels, peroxynitrite content, reduced thiol content, heme oxygenase activity, reactive oxygen species production, and stannous chloride scavenging capacity were measured. It was found that stannous chloride protects proximal tubular epithelial cells from potassium dichromate-induced cell death. The decrease in extracellular and intracellular hexavalent chromium concentration, the induction of heme oxygenase 1, and the ability to scavenge reactive oxygen species and peroxynitrite are involved in the mechanism by which stannous chloride protects proximal tubular epithe...

5 citations

Patent
27 Mar 2009
TL;DR: In this article, a method of obtaining antibacterial textile fibre material consists of reduction of silver from an aqueous solution of silver nitrate with a reducing agent, in this case tannin and fixing the tanning agent on the fibrous material through soaking it in an aiquous solution with tartar emetic with a concentration of 0.5-1.5 wt %, separation from the aquequeous phase, after which the moist fibrous materials is put in an acid solution of salt nitrate of concentration 0.1-3.0 w
Abstract: FIELD: textiles. ^ SUBSTANCE: present invention pertains to textile fibre material production, containing antibacterial substances. Antibacterial textile fibre material is based on cotton or lint or silk or wool, 97.9-99.7 wt % and partially soluble inorganic salts of silver - 0.3-2.5 wt %. Method of obtaining antibacterial textile fibre material consists of reduction of silver from an aqueous solution of silver nitrate with a reducing agent, in this case tannin and fixing the tanning agent on the fibrous material through soaking it in an aqueous solution of tartar emetic with a concentration of 0.5-1.5 wt %, separation from the aqueous phase, after which the moist fibrous material is put in an aqueous solution of silver nitrate of concentration 0.1-3.0 wt % heated to 50-100°C, separated from the aqueous phase and dry the obtained fibrous material with the silver applied on it followed by treatment with an aqueous solution of sodium hypochlorite or potassium dichromate. ^ EFFECT: invention makes it possible to increase in resistance to wet treatment of textile fibrous materials and expanding the colour range of antibacterial textile fibrous materials in towards light tones. ^ 4 cl, 5 ex

5 citations

Journal Article
TL;DR: In this article, carbon cloth was used as an anode for microbial fuel cell (MFC) anodes and the modified anodes yielded maximum power densities of 291.11 mW·m −2 and 438.08 mW ·m−2, 21% and 82% higher than that of the unmodified carbon cloth anode respectively.
Abstract: Oxidants of nitric acid and acidic potassium dichromate were used to modify anode carbon cloths. Modification was completed by first putting the carbon cloth into nitric acid or acidic potassium dichromate at a given temperature, soaking for 30 min and then rinsing with de-ionized water until no variation in pH and finally putting into a vacuum dryer, drying for 12 h. Fourier transform infrared spectroscopy measurements indicated that many hydroxyls and carboxyls were attached on the carbon cloth surface after modification. SEM results showed that the surface of carbon cloth became rougher than the unmodified one. In addition, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements demonstrated that both modified anodes had excellent electrochemical properties. Using the modified carbon cloths as microbial fuel cell (MFC) anodes respectively, such MFCs yielded maximum power densities of 291.11 mW·m −2 and 438.08 mW·m −2 , 21% and 82% higher than that of the MFC with unmodified carbon cloth anode respectively.

5 citations

Patent
04 Jan 2017
TL;DR: In this paper, a method for rapidly determining the content of organic matter in soil is described. But the method comprises steps as follows: 005-05 g of a soil sample is weighed and added to a digestion tube, 01-03 g of bismuth nitrate is added, and 10-15 mL of a potassium dichromate-concentrated sulfuric acid solution with the concentration being 04 mol/L and 3-5 mL of strong phosphoric acid are added; the digestion tube is placed in a digestion device provided with a graphite heating plate and
Abstract: The invention discloses a method for rapidly determining the content of organic matter in soil The method comprises steps as follows: 005-05 g of a soil sample is weighed and added to a digestion tube, 01-03 g of bismuth nitrate is added, and 10-15 mL of a potassium dichromate-concentrated sulfuric acid solution with the concentration being 04 mol/L and 3-5 mL of strong phosphoric acid are added; the digestion tube is placed in a digestion device provided with a graphite heating plate and suitable for simultaneous digestion of large batches of determined samples, accurate heating at 180 DEG C is performed, and organic carbon in the soil is oxidized; residual potassium dichromate in the digestion tube is titrated with a ferrous sulfate standard solution under electromagnetic stirring; then the amount of potassium dichromate consumed by the sample is multiplied by an oxidation correction coefficient, and the content of the organic matter in the soil is calculated The method has the advantages of being high in accuracy, good in repeatability, simple to operate, low in energy consumption, low in cost, capable of saving time and labor, reliable in determined results and the like

5 citations

Journal ArticleDOI
01 Jan 1991-Analyst
TL;DR: In this paper, a simple, rapid and automated spectrophotometric method for quantitative determination of water in acetone, five previously reported batch techniques were applied to flow injection analysis (FIA).
Abstract: In the search for a simple, rapid and automated spectrophotometric method for quantitative determination of water in acetone, five previously reported batch techniques were applied to flow injection analysis (FIA). The selected reagents applied to the flow injection mode included lead tetraacetate Chromeazurol B, dithizone, cobalt dichloride, and potassium dichromate. Although the method using potassium dichromate as a reagent provided, by far, the best results for the range from 0.05 to 5.0% v/v water–acetone, in this paper, all five experiments are described. Four of the methods are only mentioned briefly to explain their major drawbacks and obstacles when applied to FIA; the technique using potassium dichromate chemistry is described in detail.

5 citations


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