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Tuesday, April 21, 2020 | History

2 edition of Investigations on chromium sulfides. found in the catalog.

Investigations on chromium sulfides.

Christiaan Frans van Braggen

Investigations on chromium sulfides.

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Published by Klaine der A 3-4, V. R. B. Offsetdrukkerij in Groningen .
Written in English

    Subjects:
  • Chromium sulphide.

  • Classifications
    LC ClassificationsQD181.C7 B7
    The Physical Object
    Pagination135 p.
    Number of Pages135
    ID Numbers
    Open LibraryOL5513325M
    LC Control Number73422239

    chromium(II) sulfide; The oxidation number of chromium in chromium sulphide is 2. Synthesis. Not available. Solid state structure. Geometry of chromium: Prototypical structure: Element analysis. The table shows element percentages for CrS (chromium sulphide). Element % Cr.


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Investigations on chromium sulfides. by Christiaan Frans van Braggen Download PDF EPUB FB2

Band structures of the chromium sulfides. A schematic band model is presented enabling one to under­ stand - at least qualitatively - some of the electrical and mag­ netic properties obsen-ed. The presence of atomic and electronic disorder in crystalline. solids will influence their physical properties.

This is illustratedAuthor: Christiaan Frans van Bruggen. The first and most extensive monograph evaluates the carcinogenicity of chromium and its compounds. The monograph is divided into subsections based on the oxidation state and solubility of the compounds, with separate evaluations made for metallic chromium, chromi-um[III] compounds, chromium [VI] compounds, and for a fourth group of tested agents that.

INVESTIGATIONS INTO SULFIDE MINERALIZATION AT MOUNT ISA, QUEENSLAND [Peter J Solomon] on *FREE* shipping on qualifying : Peter J Solomon.

Download PDF: Sorry, we are unable to provide Investigations on chromium sulfides. book full text but you may find it at the following location(s): (external link); https://pure Author: Christiaan Frans van Bruggen.

Investigation of iron sulfide deposits in South-Central Aitkin County and Carlton County, Minn. [Pennington, James] on *FREE* shipping on qualifying offers. Investigation of iron sulfide deposits in South-Central Aitkin County and Carlton County, : James Pennington.

The Chromium Reducible Sulfur (CRS) method is now a routine commercial laboratory method originally introduced into Australia to estimate the acid production potential of acid sulfate soils (Sullivan et al.,Sullivan et al.,Ahern et al.,ISO, a, ISO, b) and coal mine wastes (Schumann et al., ), usually siliceous materials containing relatively low Cited by: 1.

Pyrite, an iron sulfide, occurs in many soils and sediments, making it an important natural reductant of toxic metal pollutants.

This study investigated the processes leading to aqueous Cr(VI) reduction by pyrite in a closed thermostated (25 +/- degrees C) system and under an argon by: A novel biochar supported nanoscale iron Investigations on chromium sulfides.

book (FeS) composite ([email protected]) combining the advantages of biochar, carboxymethyl cellulose (CMC), and FeS was synthesized and tested for Cr(VI) removal efficiency and by:   Chromium(VI) Sulfide=CrS3.

This is because the VI means 6 which means the charge of Chromium(Cr) is +6 and we know that the charge of the sulfide ion is -2 because S is in group 16/6A on the periodic table so since the charge of Cr is +6 and the charge of S is -2 you need 3 S to have a total negative charge of -6 to cancel out the +6 charge of Cr so since you.

The Sulfide Class minerals comprise an economically important class of minerals. Most major ores of important metals such as copper, lead and silver are sulfides. Strong generalities exist in this class. The majority of sulfides are metallic, opaque, generally sectile, soft to average in hardness and they have high densities, black or dark-colored streaks, and an igneous origin.

Comparative Study of Chromium(V) and Chromium(VI) Oxidation of Dialkyl Sulfides. Tetrahedron56 (32), DOI: /S(00) Zaheer Khan, Kabir-Ud-Din. Kinetics and mechanism of the reaction between dimethylformamide and chromium Cited by: The present study shows that about % of total chromium is mobilisable, and % of total chromium is nonbioavailable in soil, whereas about % of total chromium.

Chromium Sulfide is a moderately water and acid soluble Chromium source for uses compatible with sulfates. Sulfate compounds are salts or esters of sulfuric acid formed by replacing one or both of the hydrogens with a metal. The reduction of Cr(VI) to Cr(III) decreases the toxicity and mobility of chromium contaminants in soils and water.

In addition, the formation of a highly insoluble Cr(III) product would decrease the likelihood of future Cr(III) re-oxidation. Amorphous iron sulfide minerals like mackinawite (FeS1-x) have the potential to reduce large quantities of Cr(VI) and in the process form very stable [Cr.

Chromium(III) Sulfide is the inorganic compound with the formula Cr 2S 3. It is a brown-black solid. Chromium sulfides are usually nonstoichiometric compounds, with formulas ranging from CrS to Cr 67S (corresponding to Cr 2S 3).Chemical formula: Cr₂S₃.

The Boeing Company conducted extensive experimental investigation of the soluble sulfide process and lime precipitation process with various industrial metal finishing (anodizing, metal cleaning, printed circuit etching, and several types of electroplating) wastewaters.

The carcinogenicity of chromium[III] and of metallic chromium could not be determined on the basis of available evidence. The second monograph presents similar information for metallic nickel and nickel alloys, nickel oxides and hydroxides, nickel sulfides, nickel salts, and other nickel compounds.

Chromium - Iron - Sulfur. Above the transition temperature OL-I changed to a chromium-rich sulfide composition and was associated with a sudden decrease in. The mechanism of oxygenation of organic sulfide by oxo(salen)chromium(V) complexes has been studied experimentally and by the density functional theory (DFT) method.

Chromebook is basically built on Linux kernel, deploys Sea BIOS (Open Source Firmware specially developed for x86 architecture) runs on Chrome OS. As tempting as it seems, chrome book is a real challenge for an investigator.

The primary reason being is that most of the data is getting stored on the cloud, logically hardly any concrete data is g: sulfides. The novel basis for the process is the formation of a sulfide matte in which chromium is concentrated in a discrete chromium sulfide phase.

Mineral processing and hydrometallurgical procedures are used to separate chromium sulfide from the other matte constituents. Chromium is naturally present in the environment, it is widespread in rocks, animal, plants and soil, and is the seventh most abundant element on Earth's crust, at concentrations ranging from to µg g In nature, Cr is found in the form of its compounds, and the most important chromium ore is chromite, (Fe, Mn)Cr 2 O 4 [1,2].Cited by: Geochemistry of Chromium; Goldschmidt classification: Lithophile: Cr 3+ was one of the ions least depleted from the mantle in the formation of the crust.: Cr 3+ enters early-forming phases in igneous rocks.: Cr 3+ is commonly concentrated in residual soils and sediments.: Cr 3+ is essential to nutrition of at least some vertebrates ('essential minerals').

Chromium (III) sulfate is a compound of chromium and sulfate in which the ratio of chromium (in the +3 oxidation state) to sulfate is It contains a chromium (3+).

Chromic sulfate is a dark green to violet crystalline material. Used in paints and inks, ceramics, and in textile dyeing. It is noncombustible.

The primary hazard of this material. Title: Total Sulfide, Methylene Blue Method Page 3 of 10 Printouts of this document may be out of date and should be considered uncontrolled.

To accomplish work, the published version of the document should be viewed online. Document Type: SOP-Technical Pre-Qualtrax Document ID: SOP Issue 2 Rev 1 Size: KB.

Acetone extracts showed the potential of these sulfides in inhibiting the polarization of M2 activated macrophages that are capable of suppressing tumor-cell proliferation.

The effect of the thiolane-type sulfide of a major component, onionin A1, on tumor progression and metastasis in both osteosarcoma and ovarian cancer-bearing mouse models Cited by: 6.

Chromite is the most important ore of chromium from which it derives its name. Chromium is an important metal and has a wide range of industrial uses.

Chromite forms in deep ultra-mafic magmas and is one of the first minerals to crystallize. It is because of this fact that chromite is found in some concentrated ore bodies.

The low sulfide horizon contains up to 3 vol percent sulfides with Cu and Ni in the range to wt percent, with PGE concentrations comparable, and sometimes higher (up to 40 g/t) than in PGE-Cu-Ni ores, and with higher Pt/Pd ratios. Structure, properties, spectra, suppliers and links for: Chromium(2+) sulfide.

Zn-ion batteries have been widely investigated due to their low cost, high safety and eco-friendliness. We comprehensively evaluate the performance of oxides (MoO 3, TiO 2, and Fe 3 O 4), sulfides (MoS 2, WS 2, and MnS) and borides (TiB 2 and ZrB 2) in zinc ion battery is found that MnS is a good alternative cathode material with a reversible capacity of mA h Cited by: guidebook, Penrose Conference on mafic plutons and magmatic sulfides.

Books, K. G.,Paleomagnetism of some Lake Superior rocks: U.S. Geological Survey Professional Paper42 p. Boucher, M.

L.,Copper-nickel mineralization in a drill core from the Duluth Complex of northern Minnesota: U.S. Bureau of Mines Report ofAuthor: Gerald K. Czamanske, Pauline C. Bennett, Michael L. Zientek, Paul W. Weiblen, George A. Havach, Mich. The carcinogenicity of chromium III] and of metallic chromium could not be determined on the basis of available evidence.

The second monograph presents similar information for metallic nickel and nickel alloys, nickel oxides, and hydroxides, nickel sulfides, nickel salts, and other nickel : World Health Organization.

A Modeling and Experimental Investigation of Metal Release from Contaminated Sediments The Effects of Metal Sulfide Oxidation and Resuspension Grant Number R relationship to chromium toxicity. Masters Thesis, Department of Environmental Engineering, Manhattan College, The intensity of the sulfur print is influenced by the concentration of sulfur in the steel, the chemical composition of the sulfide inclusions, the aggressiveness of the aqueous acid solution, and the duration of the contact printing between the acid soaked emulsion coated paper and the ground surface of the specimen (this time is the order of seconds rather than minutes).

The carcinogenicity of chromium [III] and of metallic chromium could not be determined on the basis of available evidence. The second monograph presents similar information for metallic nickel and nickel alloys, nickel oxides, and hydroxides, nickel sulfides, nickel salts, and other nickel : International Agency For Research on Cancer.

The adsorption of chromium(VI) from aqueous solutions onto multi-walled carbon nanotubes (MWCNTs) has been investigated under various experimental conditions of initial metal concentration, agitation speed, aqueous pH, temperature and adsorbent dosage to assess the equilibrium and kinetic parameters.

It was found that the kinetic data were fitted with the Author: Francisco J. Alguacil, Félix A. Lopez. Chromium(III) sulfate usually refers to the inorganic compounds with the formula Cr 2 (SO 4) 3. x(H 2 O), where x can range from 0 to Additionally, ill-defined but commercially important "basic chromium sulfates" are known.

These salts are usually either violet or green solids that are soluble in water. It is commonly used in tanning ance: reddish-brown crystals (anhydrous), purple crystals (hydrated). This material contains Chromium Sulfide (Cr2S3) (listed as Chromium (VI) compounds), 99%, (CAS# ) which is subject to the reporting requirements of Section of SARA Title III and 40 CFR Part Clean Air Act: This material does not contain any hazardous air pollutants.

This material does not contain any Class 1 Ozone depletors. The status of a newly polished sample at each stage of the investigation was given as a basis for comparison. It was found that SRB caused a loss of passivity in the M HCl solution, due to the formation of sulfides. The following sulfides were observed: FeS, FeS{sub 2}, NiS, Cr{sub 2}S{sub 3} and possibly Fe{sub 1{minus}x}S{sub x}.Author: Chen, G.

Rank the following salts (lowest to highest) in terms of the number of moles of the salt that will dissolve to form 1 liter of saturated solution in water: Copper(II) hydroxide Tin(II) sulfide Chromium(III) hydroxide Calcium phosphate Nickel(II) sulfide. The present report describes observations and analyses in a survey study of erosion damage in chromium plated gun bore surfaces.

Sections of three fired.Chromium;sulfane | CrH2S | CID - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities. Chromium (III) sulfide. My friend, I will show you how this is done on practically every problem imaginable.

The (III) tells you this Chromium has a charge of +3. The sulfide is the anion for sulfur which means it has a -2 charge (look at what per.