Hazards,heavy,metal,nickel,Mos health Hazards of heavy metal nickel
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Most industrial nickelfor stainless steel and other corrosion-resistant alloys; Nickel also used innickel plating, ceramics, batteries, polypropylene coloring; mainly for ahydrogenation catalyst in chemistry.Nickel is a silver-white metal; meltingpoint is1455 ° C, the boiling point is 2730 ° C, the density is 8.9 g / cm 3. Nickel is harder and tougherthan iron, with ferromagnetic and ductility, can conduct electricity and heat. Thecommon industrial nickel compounds have nickel oxide, nickel trioxide, nickelhydroxide, nickel sulfate, nickel chloride and nickel nitrate. Can cause acutepoisoning except the most toxic nickel carbonyl, nickel, and a water-solublecompound having the sensitization, certain nickel compound has a potentialcarcinogenicity. The major nickel poisoning is inhaled nickel and its saltsdust caused clinical manifestations of respiratory irritation and skin damage. Accordingto metalpowder supplier, nickel is used in the industrial production of variousnickel alloys, utensils and materials. The workers long-term exposure to nickelnot only have the poisoning opportunities, but also increased cancer risk.Patients with cough, expectoration, chesttightness, chest pain, asthma. Chest X-ray showed increased lung markings, thepatchy shadows, hilar widened. Engaged in nickel electrolysis andelectroplating workers may cause rhinitis, anosmia and nasal septumperforation. Skin lesions are more common in exposed parts. Lesions nature is erythema,papules, constant itching, so called nickel scrapie. Chronic skin lesionsshowed lichenification or pigmentation. The skin lesions self-healing afterseveral weeks or months. Other long-term exposure to nickel workers will increasethe risk of nasal cancer and lung cancer.Stainless steel cutlery is generallycontaining chromium and nickel, chromium is the material make the product doesnot rust, and nickel is corrosion resistant material. If use low-qualitystainless steel cutlery or use stainless steel cutlery in improper methods, itmay cause heavy metals on human health hazards.Recently, scientists have discovered that anominal value of 1 euro and 2-euro coins will release the ultra-high amount ofnickel, causing skin allergies. One of the reasons is not simply a high nickelcontent, but that the two coins unique design - double alloy. 1,2 Euro coincontaining nickel, and their outer edge trimmed with a circle with the innercore component of the alloy, thereby increasing the difficulty of forgery. Inwhich the outer ring of the euro coins as copper, zinc, nickel alloy, the innercore of copper-nickel alloy; 2 euro coins contrary, the outer ring is acopper-nickel alloy inner core of copper and zinc-nickel alloy. The nominalvalue of less than 1 euro coins are no containing nickel.Scientists put coin in a simulated humansweat or a saturated salt solution, find that it can cause 30-40 millivoltvoltage between the two alloys. The simulated sweat release of nickel ions inquantities of 1,2 Euro coins is considerably higher than the pure nickel, whilea coin rapid corrosion. They put the coins with a transparent adhesive in theskin of seven patients with nickel allergy, after 48-72 hours, all patients hadskin redness from the blisters allergic reactions.Magnetic nickel is widely used in themanufacture of jewelry, coins, metal buttons. Due to a lot of ordinary people allergicto nickel, the European Union limit the nickelrelease in the "long-term contact with the skin objects such as earringsand watches, but the coin is not in the restricted. The scientists said thatthe number of 1 and 2 euro coins release of nickel is 240 to 320 times higherthan the EU above the standard limit value. This may cause skin allergies in workerswho contact with the coin regularly.Source:http://www.mhcmp.com
Hazards,heavy,metal,nickel,Mos