Mercury (element)
A heavy, silvery-white metal flows freely at room temperature. Mercury remains liquid until the temperature drops to minus 38.83 degrees Celsius. This unique state distinguishes it from all other metals found on Earth. Only bromine shares this property among non-metals. The element possesses a density of 13.69 grams per cubic centimeter when in liquid form. A standard pound coin floats upon its surface due to buoyancy forces. Solid mercury becomes malleable and ductile enough to be cut with a knife. Its volume decreases by 3.59 percent upon freezing. This contraction creates unusual physical properties for a metallic substance. Scientists attribute these behaviors to lanthanide contraction and relativistic effects reducing electron orbit radii. The boiling point reaches 356.73 degrees Celsius, marking the lowest threshold for any stable metal.
Mercury appeared in Egyptian tombs dating back to 1500 BC. Cinnabar ore provided the primary source for ancient civilizations throughout history. Chinese alchemists believed consuming mercury would prolong life and heal fractures. The first emperor of unified China reportedly died after drinking a mixture containing mercury and powdered jade. He sought an elixir of immortality formulated by court alchemists. In Islamic Spain, rulers filled decorative pools with the liquid metal. Khumarawayh ibn Ahmad ibn Tulun constructed a basin where he lay on air-filled cushions. Ancient Greeks used cinnabar in ointments and cosmetics. Daedalus allegedly poured quicksilver inside wooden statues to create movement. By 500 BC, artisans created amalgams combining mercury with other metals. Alchemists viewed the element as First Matter from which all metals formed. They attempted transmutation of base metals into gold using varying quantities of sulfur within the mercury. Mines in Almadén, Spain dominated production for over two millennia before new deposits emerged at the end of the nineteenth century.
The patio process invented in 1558 extracted silver from ore using mercury. This method became essential to the economy of Spain and its American colonies. More than 100,000 tons of mercury were mined from Huancavelica, Peru over three centuries following discovery in 1563. A sudden mine collapse in 1786 killed over 100 people and reduced output significantly. Scavenging known as pallaqueo increased production again peaking between 1794 and 1796. The French Revolutionary Wars disrupted European supply leading to reliance on Peruvian mines. China produced 2,200 tonnes of mercury in 2020 representing 88 percent of global output. Prison labor developed new cinnabar mines in the 1950s by private mining companies. Thousands of prisoners established tunnels at the Luo Xi mining company. Worker health remains at high risk in functioning mines today. Nevada's McDermitt Mine closed in 1992 marking the last United States operation. Abandoned sites contain hazardous waste piles of roasted cinnabar calcines causing ecological damage through water run-off. Santa Clara County purchased the historic Almaden Quicksilver Mine in 1976 creating a county park after safety analysis.
Over 3,000 people suffered deformities or death from Minamata disease between 1932 and 1968. Waste mercury compounds dumped into Minamata Bay caused severe poisoning symptoms. Fish concentrate methylmercury in their bodies forming highly toxic organic compounds. Species like shark, swordfish, king mackerel, bluefin tuna, albacore tuna, and tilefish contain higher concentrations than others. Mercury accumulates in viscera and muscle tissue over time. Predators consuming prey fish amass body burdens ten times higher than species they eat. This process called biomagnification occurred in the Lower Amazon where gold mining releases mercury into aquatic ecosystems. Studies report mercury concentrations ranging from 0.01 to 0.67 micrograms per gram in fish muscle tissue. Carnivorous species like Plagioscion squamosissimus show levels exceeding World Health Organization safety thresholds of 0.5 micrograms per gram. Local communities relying on fish as dietary staples face potential health risks from exposure. Symptoms include sensory impairment, disturbed sensation, lack of coordination, tremors, impaired cognitive skills, and sleep disturbance. Chronic exposure leads to erethism characterized by irritability, excitability, excessive shyness, insomnia, fatigue, memory loss, vivid dreams, and depression.
Fourteen countries agreed to the Minamata Convention on Mercury signed the 10th of October 2013. The United Nations Environment Programme aimed to prevent vapor emissions globally. Norway enacted a total ban effective the 1st of January 2008 prohibiting manufacturing and import export operations. Sweden banned products containing mercury in 2009 while Denmark restricted elemental mercury since 2008 except for energy-saving light sources and dental fillings. The European Union banned mercury in non-electrical measuring devices starting the 1st of July 2006. Sales of thermostats decreased from 14.5 tons in 2004 to 3.9 tons in 2007 within the United States. Many applications now use Galinstan alloy replacing liquid mercury despite higher costs. Skin whitening creams continue exceeding limits set at one part per million concentration. New York City residents face significant exposure through skin care products. Coal-fired power plants remain major emission sources contributing forty percent of United States releases in 1999. China produces fifty percent of global emissions mostly resulting from vinyl chloride production. The Environmental Protection Agency regulates contamination under Clean Air Act passed in 1990. Industries installing maximum achievable control technologies reduced mercury sharply after stricter controls introduced in 2015.
Continue Browsing
Common questions
What is the freezing point of Mercury?
Mercury remains liquid until the temperature drops to minus 38.83 degrees Celsius. This unique state distinguishes it from all other metals found on Earth.
When did ancient civilizations first use Mercury in tombs?
Mercury appeared in Egyptian tombs dating back to 1500 BC. Cinnabar ore provided the primary source for ancient civilizations throughout history.
How much mercury was mined from Huancavelica Peru over three centuries?
More than 100,000 tons of mercury were mined from Huancavelica Peru over three centuries following discovery in 1563. A sudden mine collapse in 1786 killed over 100 people and reduced output significantly.
Which countries signed the Minamata Convention on Mercury and when?
Fourteen countries agreed to the Minamata Convention on Mercury signed the 10th of October 2013. The United Nations Environment Programme aimed to prevent vapor emissions globally.
What health risks are associated with consuming fish containing methylmercury?
Over 3,000 people suffered deformities or death from Minamata disease between 1932 and 1968 due to waste mercury compounds dumped into Minamata Bay. Symptoms include sensory impairment disturbed sensation lack of coordination tremors impaired cognitive skills and sleep disturbance.