Mercury element3/11/2023 ![]() Less common exposures: On rare occasions, people can suffer serious health consequences after exposures to very high levels of mercury vapor, especially if the exposure has occurred over a prolonged period. Two examples of very high exposures, with serious health effects: Learn more about mercury pollution from artisanal and small-scale gold mining. Miners working tailings in areas where mercury was previously used can also be inadvertently exposed to the residual mercury in these deposits. This process is very dangerous and can lead to significant mercury exposure. The amalgam is then heated, vaporizing the mercury and leaving the gold. Mercury is mixed with gold-containing materials, forming a mercury-gold amalgam. Gold mining: Metallic mercury is sometimes used in artisanal and small-scale gold mining at locations outside of the United States.Learn more about mercury in dental fillings. ![]() Amalgam use is declining because the incidence of dental decay is decreasing, and because well-performing substitute materials are available for restoring teeth. It is made up of approximately 40-50% mercury, 25% silver, and 25-35% blend of copper, zinc and tin.
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