瑞士:下水道里也有黄金? 分享到
Scientists Find Large Amounts of Precious Metals in Wastewater 2017-11-1172280

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In recent months, stories about sewers getting clogged have made international headlines. For example, a so-called "fatberg," a mass of grease and diapers, clogged London’s sewers.
近几个月来,下水道堵塞的新闻登上了各大国际新闻头条。比如大量油脂和尿布组成的“油脂块”堵塞了伦敦的下水道。
A new study has found stranger materials in a wastewater system: large amounts of rare and precious metals.
最新研究发现,污水系统中含有一种奇怪的物质:大量的稀有珍贵金属。
Researchers examined 64 wastewater treatment centers across Switzerland. A government press release says it was the first study on trace elements in wastewater in an industrialized country.
研究人员检测了瑞士64家污水处理中心。一份政府新闻稿称,这是首次在工业化国家进行的污水微量元素研究。
The researchers found 3000 kg of silver and 43 kilograms of gold in effluent and sludge from the centers. The value of the materials was somewhere around $3.1 million dollars.
研究人员从污水处理中心的污水和污泥中发现了3000千克的银和43公斤的金。这些价值约为310万美元。
The silver and gold were in the form of tiny particles. The researchers said the particles were most likely released during manufacturing of chemicals, pharmaceuticals, or watches.
这些金银以极小的颗粒存在。研究人员表示,这些颗粒很有可能在制造化学物质、药品或手表的过程中释放出来。
Bas Vriens is one of the researchers. You hear stories about an angry man or woman throwing jewelry down the toilet, but we didn’t find any rings, unfortunately, he said.
巴斯·福利瑞恩是其中一名研究人员。“你听到过愤怒的男人或者女人把珠宝扔进马桶,但事实上,我们并没有发现任何戒指。”
The levels of gold and silver were very small, in the micrograms, or even nanograms, but when you add them up it’s pretty substantial.
“虽然金银的数量非常少,微克甚至毫微克,但是把它们加起来就相当可观了。”
The researchers also found large amounts of rare earth minerals.
研究人员也发现大量的稀土矿物。
The level of metal concentrations did not violate Swiss laws. They were removed before the water entered the drinking water system.
(水中的)金属含量并没有违反瑞士法律标准。这些金属在进入饮用水系统之前就已经被去除掉了。
Vriens cautioned people against trying to find precious metals in drinking water. It wouldn’t make sense for people to boil their tap water to recover gold or silver because it has already been filtered out before it re-enters the drinking water supply," Vriens said.
福利瑞恩告诫人们不要试图在饮用水里找到稀有金属。他说:“人们烧开自来水提取黄金或白银,这是没有意义的,因为金属在重新进入饮用水供应前,已经被过滤掉了。”
I’m John Russell.
约翰·拉塞尔为您播报。

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