论文部分内容阅读
数量巨大的盐估计每立方公里海水中就含盐2700多万吨,若将海洋中盐全部取出,则可在整个地球表面铺上一层平均厚达15米的盐壳。目前,全世界年产食盐仅1亿余吨,若以这个产量计算,那么全世界海洋中的盐可供人类消耗数百万年。含元素种类众多的锰结核四大洋底都有锰结核分布,它是一种外形酷似马铃薯的海底沉积生成物,据科学分析它含有40种以上元素,其中尤以锰、铁含量大。全世界四大洋的底部锰结核估计达15000～30000亿吨,其中仅太平洋中锰结核就能提炼锰500亿吨、铜400亿吨、钴40亿吨、镍200亿吨,按目前世界消耗水平计算,这些锰可用2400年、铜
Large quantities of salt are estimated to contain more than 27 million tons of salt per cubic kilometer of seawater. If all the salt in the ocean is removed, a salt shell averaged over 15 meters thick can be spread over the entire Earth’s surface. At present, the world produces only 100 million tons of salt per year. With this yield, the salt in the world’s oceans can be consumed by humans for millions of years. Containing a large number of species of manganese nodules all have a distribution of manganese nodules on the four ocean floor, it is a shape resembles potato seabed sediment products, according to scientific analysis contains more than 40 elements, especially manganese, iron content. Manganese nodules at the bottom of the four oceans in the world are estimated at 15000-300 billion tons, of which only 50 billion tons of manganese, 40 billion tons of copper, 4 billion tons of cobalt and 20 billion tons of nickel can be extracted from the mid-oceanic manganese nodules alone. According to the current world consumption level Calculated, these manganese is available for 2400 years of copper