It is redissolved in HCl, and the solution is purified by a series of cementations. The reduced zinc accumulates as zinc vapor in the gas bubbles. Koch.] The evaporation conditions for ZnS have been described by Cox and Hass [19]. The first point of view employs a deterministic and multiphysics modeling approach that uses detailed physics and the associated modeling equations. There appears to be no loss in reflectance of ZnS coatings on exposure to air unless exposed to UV radiation at the same time, in which case the ZnS is converted to ZnO [18]. Typical zinc values allowing an economical recovery can be found in the range of 8–12%, depending on the current zinc price (Koch and Janke, 1984; Krajewski and Krüger, 1984; Ullmann's Encyclopedia, 2007; Püllenberg and Höhn, 1999; Jak and Hayes, 2002). The emission (left) and absorption (right) spectra of various QDs. So, how can I adjust the final formula to basic range using a substance that is compatible with zinc sulfate? This emission is produced when the gamma photons transfer their energy to an electron on the K orbital of the daughter nuclide, 137Ba, and this K electron is emitted. Under the effect of radiation, the electrons can pass from the valence band to the conduction band and then return to the valence band, emitting photons whose energy is in the ultraviolet range. If so, the quenching effects have to be corrected by suitable measuring techniques (such as standardization). inorganic chemistry, sSolubility of inorganic compounds All Metal sulfides dissolve in dilute acids and produce hydrogen sulfide gas and metal salt.. CuS + HCl → CuCl 2 + H 2 S. As an example, copper sulfide (CuS) is a black precipitate and dissolve in dilute HCl acid and form blue color CuCl 2 solution. Jürgen Antrekowitsch, ... Rene Rumpold, in Handbook of Recycling, 2014. The slag fuming is based on the reduction with carbon according to the following equation: Zinc evaporates and is reoxidized in the off-gas system, generating a high zinc-containing dust that is collected in the baghouse. The main advantage of NaI(Tl) detectors is that large single crystals can be produced that will allow the linear movement of the gamma and light photons without diffraction. The wavelength of the light depends on the identity of the scintillator. This information is not yet completed. Thus, when sintering machines are used (now obsolete), more metals are volatilized because of the higher temperature and the dust contains more water-soluble components due to the formation of sulfates. When the sensitivity of the photocathode coincides with the energy of the light photon emitted by the primary scintillator, no secondary scintillator is required. Figure 9.6 illustrates such a gas bubble with an enclosed char particle explaining the relevant reactions between gas, char and slag. FIGURE 9.6. The resistivity of the films decreases upon increase of Hg concentration in the films and, for a particular concentration, it increases with rise of substrate temperature. It's known from literature that zinc sulfate is incompatible with strong bases . A suspension, an emulsion, or a gel of the sample can also be prepared and used for measurement. During roasting, the zinc sulfide turns into zinc oxide. A visible change in fluorescence should be observed under UV light. Inject the desired volume of ZnS precursor solution dropwise over 2 min (according to the concentration of CdSe QDs and coating thickness48). As postulated in the theory of solids, instead of having discrete energies as in the case of free atoms, the available energy states form bands. The addition of a strong acid will have the greatest effect on the solubility of a salt that contains the conjugate base of a weak acid as the anion. In this way, the sample and the scintillator are in direct connection within the molecular dimensions; thus, the absorption can be ignored. Extensive laboratory testing considered acid solubility and other scale-removal issues at downhole temperature and pressure conditions, as compared with the theoretical solubility of zinc sulfide in hydrochloric acid (HCl). Can I dissolve it by changing the level of some factors as temperature, chemical potential or ...? FIGURE 2.4. Nowadays, cerium-doped lanthanum bromide [LaBr3(Ce)] scintillation detectors are used. In the case of inorganic scintillators, the crystal lattice, including its defects, plays an important role, while in the case of organic scintillators, the physical–chemical processes within the molecules of the solid or liquid scintillator material result in light photon emission. These electrons are the source of the scintillation that is measured in the detector (Figure 14.4). Well-defined peaks with characteristic gamma photon energy are obtained by cascade interaction within a short time if there are no scattering and diffraction. Zinc protects the base metal from corrosion by acting as a sacrificial anode. These photons, however, are absorbed by the scintillator material. The energy of the electrons emitted in the Compton scattering depends on the angle of scattering producing a continuous range in the gamma spectrum. The Hazard fields include special hazard alerts air and water reactions, fire hazards, health hazards, a reactivity profile, and details about reactive groups assignments and potentially incompatible absorbents.The information in CAMEO Chemicals comes from a variety of data sources. Thus, the energy of the radiation can be measured. Zinc ore (zinc sulfide) is treated with sulfuric acid, leaving a solution with some undissolved bits of material and releasing hydrogen sulfide gas. An alternative flowsheet practiced in several operating plants is the bulk flowsheet, shown in Figure 14.7 (i.e. Zinc sulfate is used in the manufacture of viscose rayon fiber, as one of the ingredients in the spinning bath along with sodium sulfate and sulfuric acid. That is why the dust is added to the calcine during processing. The zinc sulfide is then roasted to form zinc oxide, followed by reduction with carbon and/or carbon monoxide. Before smelting, zinc sulfide is usually concentrated by a float and sink method. After leaching the calcine with H2SO4, a copper–cadmium–thallium precipitate is obtained from the solution by adding zinc dust. Frequently, the gamma spectra contain other peaks with low energies, such as the X-ray lines resulting from the photoelectric effects of the surrounding material, e.g., the X-ray line of the iodine of the NaI(Tl) scintillation crystal or the lead of the shielding. About half the zinc produced is used as a coating metal. (For color version of this figure, the reader is referred to the online version of this book), Encyclopedia of Analytical Science (Second Edition), Encyclopedia of Materials: Science and Technology, Detection and Measurement of Radioactivity, Jürgen Antrekowitsch, ... Rene Rumpold, in, Lead concentrates are usually accompanied by zinc in the form of, Koch and Janke, 1984; Krajewski and Krüger, 1984; Ullmann's Encyclopedia, 2007; Püllenberg and Höhn, 1999; Jak and Hayes, 2002, Koch and Janke, 1984; Krajewski and Krüger, 1984; Ullmann's Encyclopedia, 2007; Sundström, 1969; Jak and Hayes, 2002, The choice of flowsheet for treatment of coarse-grained lead–, Journal of Industrial and Engineering Chemistry. Anyone help me to find the molar solubility of zinc sulfide react oxygen. Into light photons is used, the X-ray emission of electrons from the sample is water,. The mechanism of the secondary scintillator: diphenyl-oxazols, p-terphenyl, PPO ( 2,5-diphenyl-oxazol ) solution in to! 50-Ml round-bottom flask sealed with septa and containing a stir bar in a number plants. Or Wurtzite formula is explained in this technique, both the sample ( beta emitter isotope! Table 9.6, typical data for the slag fuming process are presented the conduction band not. 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