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夏威夷群岛可能成为从海底回采锰铁结核矿的工业中心,而其中的希洛岛以东的普纳海峡谷则将成为其废料(尾矿)的水下排放场。为了搞清海洋采矿对环境的影响,美国矿业局最近完成了尾矿特性的研究,这些尾矿是由五种不同的选矿流程产出的。尾矿在海水中浸出1天和30天,当pH=3.9时用二硫化氨基甲酸吡咯烷萃取进入甲基异丁基酮中,然后用原子吸收光谱仪分析11种元素;一部分海水则不经萃取而直接分析。浸
The Hawaiian Islands may be the industrial center for the recovery of ferromanganese nodules from the sea floor, of which the Puna Canyon to the east of Silo will be the underwater dump for its waste (tailings). To understand the environmental impact of marine mining, the U.S. Bureau of Mines has recently completed tailings characterization and the tailings are produced from five different beneficiation processes. The tailings are leached in seawater for 1 day and 30 days, extracted with methyl pyrrolidine disulfide into methyl isobutyl ketone at pH = 3.9, and then analyzed for 11 elements by atomic absorption spectroscopy; some of the seawater is not extracted And direct analysis. Baptist