Monday, February 20, 2012

GOLD possible environmental problems with its extraction?

need long descriptive answerGOLD possible environmental problems with its extraction?There are two primary means of extracting gold from its ore. The first method is widely used in South America - the gold ore is crushed then mixed with mercury. The gold dissolves in the mercury (forming an amalgam) while the non-gold components of the ore do not. Finally, the gold-mercury alloy is heated so that the mercury boils away, leaving only the gold in its place. The primary issue with this method is the amount of mercury that gets into the air; mercury is a highly toxic heavy metal associated with various medical problems, including dementia.



The second method is commonly used in the United States and other western nations. Rather than using mercury to dissolve the gold, cyanide salts are used to complex with the gold, allowing it to dissolve in water. The cyanide is then later removed leaving the pure gold behind. The problem with this method is similar to that of the other method; large amounts of highly toxic cyanide are used and stored in large "cyanide pools." If one of these pools were to leak and its contents contaminated groundwater, many thousands of people would succumb to cyanide poisoning.GOLD possible environmental problems with its extraction?Now, lets talk about the ingredients used to make those wonderful batteries for electric cars and how clean it is to get those resources.GOLD possible environmental problems with its extraction?gold is very important to the human beings so this is so costly.it it not get from freely from the earth.the extraction from the earth so difficult
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