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提取黄金 早在1822年,人们已经知道海水中含有黄金。但随着分析技术的不断提高,海水中含金量的估计值趋于减少。据1960年的资料报道,每升海水中含金量为9毫徽克,即1亿吨海水中含有90O克黄金。近年来,美国麻省技术研究所的两位研究人员应用最新的分析技术,对取自世界不同海域的水样进行测定后提出,每一亿吨海水中只有含有一克黄金。研究结果还表明。被称为海底‘黑烟筒’的海底热泉口可能是海水中黄金的主要来源。
Extraction of gold As early as 1822, people already know that the sea water contains gold. However, with the continuous improvement of analytical techniques, the estimation of the gold content in seawater tends to decrease. According to the 1960 data, the gold content per liter of seawater is 9 milligrams, or 90 million grams of gold in 100 million tons of seawater. In recent years, two researchers at the Massachusetts Institute of Technology applied the latest analytical techniques to determine the water samples taken from different regions of the world. Only one gram of gold is contained in each hundred million tons of seawater. The results also show. The seabed, known as the ’black chimney’, may be the main source of gold in the sea.