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It is a chemical with atomic numbers 34 and the symbol Se. 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 granular, powder, or liquid form. It is of uniform color, pure up to 99.99% purity, uniform composition, and has no impurities like soil.
Selenium is found in metal sulfur ores where it partly replaces the sulfur. Selenium is most commonly produced commercially as a by-product during the refining and production of metal sulfide ores. Selenate or pure selenide compounds are rare but known minerals. Selenium is used mainly in glass and pigments. 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 glutathione-peroxidase and Thioredoxin reductase which reduce oxidized molecules indirectly in animals and certain plants. Selenium needs in plants vary by species. Some require large amounts of the element, while others appear to need none.
Preparation with Selenium Powder
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 mainly carried out by copper and sulfur dioxide reduction. method. Pre-roasting & oxidation results in more complex equipment, higher maintenance costs, sulfur dioxide gas that is harmful to humans and the environment and lower recovery rates and purity. After solid-liquid seperation, use H2O2 for the oxidant. Adjust the pH in order to separate the selenium from the tellurium. Reduce selenium with Na2SO3 and hydrochloric acid. Selenium and tellurium recover at 99% each. The purity of the product can reach 99%.
Selenium powder Toxicity
Inhalation causes respiratory membrane irritation and can lead to pulmonary inflammation, bronchial edema or pneumonia. Elemental
Exposure can also cause mucous membrane inflammation, nose bleeding, and coughing.
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