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Some microorganisms (bacteria and fungi) and natural processes can transform mercury in the environment from one form to another. The compound most common organic mercury that microorganisms and natural processes from other forms is methylmercury. Methylmercury is particularly problematic because it can build up in certain edible freshwater fish and saltwater fish and marine mammals to levels much higher water levels around them (see Section 1.2).

Mercury is mined as cinnabar ore containing mercury sulfide. The metallic form is refined from mercuric sulfide ore or heating the ore to temperatures above 1,000 degrees Fahrenheit. testx core This vaporizes the mercury in the ore, and the vapors are captured and cooled to form the liquid metal mercury. The liquid metallic mercury has many different uses. It is used in the production of gaseous chlorine and caustic soda, and gold extraction of minerals or articles containing gold. It is also used in thermometers, barometers, batteries and switches. Dental fillings containing silver typically about 50% metallic mercury.


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