Liquid metal mercury knows no geographical boundaries in polluting the environment?
Contain the world's oceans on the amount of mercury estimated to total about 50 million tons, while estimated concentrations in the soil between 0.01 - 0.06 ppm, and rises in the rocks to end 0.09 ppm, and its concentration in the air of the world what 2 - 5 ng cubic meter . increasing year after year these concentrations to pose a real problem in the world and attention to the question of the importance and dimensions of the risk of mercury, especially in the last three decades.
Enters mercury and its compounds in many industries, where used in paper industries and electrical such as producing light bulbs, batteries and chemical industries such as dyes and other pharmaceutical industry in the production of Alakakiratabah and some types of make-up unchecked in making dental fillings and thermometers in the production of chemical solutions, as well as in the production of fungicides.
It features a mercury from other metals بميله severe lipid soluble and accumulate in living organisms, especially the human where targeted fatty tissue or organs rich in fat, including the brain, which occurs damage cells of the brain and leads to symptoms seriously ill in the nervous system of humans can also absorbed the human body mercury through several sources such as flogging, Lung, and after absorption moves with blood through the circulatory system and then some members such as the liver, kidneys and bone store and who is affected significantly with serious disorders of the digestive system, urinary and heart and the rest of the body.
When exposure to mercury vapors it happens dryness in the throat and mouth, and lead to infections in the mouth, gums and teeth fall out, chills, and potentially mental disorders ... is also affected by human mercury compounds through pollution of air mercury and the maximum allowed for organic mercury compounds 0.01 mg in per cubic meter in the air. In case the inhalation of those substances, or absorbed through the skin, they lead to erratic performance of the nervous system and a jerk as well as difficulty with speech and narrow in the field of vision or the so-called vision tunneling, as able Mercury transit through the placenta of pregnant mothers to fetus during pregnancy has proved tests of red blood cells that mercury concentrations in Kiryat embryos outperform by 28% on its concentration in blood cells of mothers. Overall Unfortunately and Mundaam 1953 the anniversary of incidents Alolimitan "Minamata then incident Niigata" in Japan, which has killed hundreds of result of pollution and mercury poisoning and to Today there are thousands of victims fall per year of mercury pollution.
Human exposure to mercury from several different ways, which include mostly by eating certain foods that contain mercury or mercury-contaminated. On or through the atmosphere polluted with mercury from burning fuel such as coal and oil, which contains large proportions of mercury, in addition to the organic mercury compounds are widely used as a pesticide for fungi and insects in the field of agriculture, which contaminate crops covered by the rights of the fruit or vegetable. It is worth mentioning that the mercury in its organic state is the most contaminated among other mercury compounds and thus poses a significant risk to human health due to the severity Ttaarh, also inorganic mercury compounds when mixing water into organic mercury compounds.
Are also transmission of mercury to the atmosphere by pollutants laboratories that use mercury in their industries, and moves to our food through the soil and what they contain contaminants that come from industrial waste that is neither treated wastes which contain quantities elevated mercury also turns mercury into drinking water from during its transfer from soil to surface water or groundwater, where mercury compounds degrade to elements or mercuric ions or ions Zibakoz. Are stored mercury compounds by sticking sediments, where liberated very small amounts of mono and dimethyl mercury into the water by microorganisms, and then absorbed by many organisms, including fish and other wild animals domesticated and non-domesticated and agricultural crops and entering all in the human diet and concentrations of mercury so high levels. . In rivers, the former would receive fresh accumulation of mercury in algae, algae and plankton, which is considered an excellent food fish rivers and thus moves mercury Oissa to these fish and then to humans.
The recent scientific study revealed that the steam from the fuel combustion process to the atmosphere to fall back again in the form of showers of toxic mercury molecules absorbed by aquatic ecosystems on Earth and cause food poisoning and crops
The British newspaper The Guardian reported that American researchers confirmed that thousands of tons of mercury vapor rising into the atmosphere annually with the passage of time is oxidized mercury and coming back to earth with rain or snow.
The world Supervisor study Seth Lehman that bacteria in the upper atmosphere turned oxidized mercury to a substance mercury methyl that can enter the food chain with great ease, adding that the mercury that emerged in an area on the surface of the earth falls away from the original source confirms degeneration with rain or Althelouh that falls to the ground.
Lehman said that the upper atmosphere is a chemical reactor to make the mercury more able to engage in environmental systems.
And mercury do not stop at any geographical limits of contamination in the environment which is totally different from any material environmental contamination as it spreads rapidly and farther distances through rivers, lakes and even oceans and before that unnoticed.
And mercury seeping into water from unprotected plants of security and safety rules where exploited fish directly to hit the markets and dining tables, causing damaged in the nervous system and network arteries in the human body.
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