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It is a chemical with the symbol Se. It has atomic number 34. It is nonmetal, but it’s more commonly called a metalloid. It has properties that are in between sulfur and tellurium on the periodic table. It is rare to find it in its pure ore compound form in the Earth’s crust.
Water and ethanol are insoluble. Selenium powder can be in a powder or granular format, with a uniform color, a consistent appearance, 99% purity, and no contaminants such as soil.
Selenium is found in metal sulfur ores where it partly replaces the sulfur. Selenium is most commonly produced commercially as a byproduct during the refining and production of metal sulfide ores. Selenate or pure selenide compounds are rare but known minerals. Selenium is used mainly in glassmaking, and as a pigment. Selenium can be used as a photocell and semiconductor. The silicon semiconductor has replaced most of the electronic applications, which were once very important. In some types of DC power surge protecters and in one type of fluorescent quantum dot, selenium is still used.
Selenium is toxic at even low doses. This can lead to selenosis. Selenium appears in many multivitamins as well other dietary supplement, infant formula and as a component to the antioxidant enzymes thioredoxin reductiontase or glutathione oxidase which reduce certain oxidized molecule in animals and in some plants. The requirements for selenium in plants vary by species. Some require large amounts, and others appear to need none.
Selenium powder preparation
Selenium is an element that is rare. No independent selenium plant exists in the world. Selenium is generally associated with the electrolysis and nickel in the electrolytic mud. Selenium and tellurium are recovered and purified using many different methods. These include caustic oxidative pressurized leaching (COPL), oxidative roasteding and high temperature leaching (OHTL), low-temperature roasting with oxidative leaching (LTOLL), dilute sulfuric acid-leaching etc. Selenium and tellurium reduction is primarily done by copper and sulfur dioxide reduction. method. Pre-roasting oxidation is a more complex method that increases the cost and complexity of the power equipment. In addition, sulfur dioxide gas can be harmful to humans and the environment. To separate selenium from tellurium using a pH adjustment, after the solid-liquid separation of selenium/tellurium is completed, use H2O2 for the oxidant. Then, reduce selenium/tellurium by adding Na2SO3 to hydrochloric acid. Selenium and tellurium recover at 99% each. Purity can be as high as 99%.
Selenium powder Toxicity
Inhalation causes respiratory membrane irritation and edema. It can also cause bronchial inflammatory disease, pneumonia, or bronchial edema. Elemental
Exposure can also cause mucous membrane inflammation, nose bleeding, and coughing.
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