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流沙河之子:父亲最放不下那些未完成的写作和研究

時間: 2017年05月31日 | 作者: admin | 來源: 未知

撰文︰克里斯多夫?因塔利亞塔(Christopher Intagliata

翻譯︰陳旭琦

審校︰喬虹

Water laced with heavy metals—like the drinking water in Flint, Michigan—can be stripped of contaminants using chemicals, filters, membranes,even electric current. But now researchers say they've created what could be a cheaper, more effective solution: a fleet of microscopic, self-propelled, aquatic robots. Each one the size of just 10 lined-up bacteria—so tiny that a billion will fit in a syringe.

可以通過化學品、濾器、過濾膜甚至電流來去除水中的重金屬污染物質,密歇根弗林特市的飲用水就是一個例子。但是,現在研究人員稱他們已經找到一種更便宜、更有效的解決方式︰一群微小的、自推進的水中機器人。它們單個的尺寸相當于10個並行排列的細菌,小到一只注射器可以容納十億個這種機器人。

 

Each tube-shaped microbot is a sandwich of three materials. A graphene outer layer, which binds to heavy metals. A middle layer of nickel, which gives the bots magnetic polarity, so they can be pulled through wastewater with magnets. And platinum inside—for propulsion. Just add a bit of peroxide to the wastewater, and it'll react with the platinum to form water and oxygen bubbles, which propel the tubes along.  

每個管狀的機器人都由三種物質層層疊加而成。外層由石墨烯構成,它能和重金屬結合。中間層由鎳構成,它使得機器人有具磁極性,因此機器人就可以利用磁性在廢水中行動。內層由鉑構成,這是為了機器人的推進力而進行的設計。僅僅在廢水中增加多一點過氧化物,它就會與鉑進行反應產生水和氧氣泡沫,從而推動管狀機器人。

 

In an hour, a swarm of 200,000 bots scavenged 80 percent of the lead from three millimeters of tainted water. And the researchers estimate that it costs only about five cents a liter to do so. The findings are in the journalNano Letters. [Diana Vilela et al, Graphene-Based Microbots for Toxic Heavy Metal Removal and Recovery from Water]

在一個小時里,20萬個機器人可以去除三毫米廢水中80%的鉛。研究人員估計處理一升的廢水大約只會花費五美分。這項陳果發表在《納米通訊》(Nano Letters)(Graphene-Based Microbots for Toxic Heavy Metal Removal and Recovery from Water)。

 

The researchers envision the bots as a portable solution for small companies—they’d treat their water onsite instead of carting it to a treatment plant. And after the robots do the rounds, the heavy metals can be stripped away. Meaning companies can reuse the heavy metals, and, ultimately, keep them out of our waterways.

 

研究人員預想這種機器人會成為小公司的便捷式解決方案,他們可以在現場處理廢水,而不是將廢水運送到專業處理工廠。在機器人完成工作後,重金屬會從廢水中清除。這意味著公司可以重復利用重金屬,並且最終使重金屬不進入我們的水路。

 

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