久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

Global EditionASIA 中文雙語Fran?ais
Lifestyle
Home / Lifestyle / News

Researchers develop greener rare-earth mining technology

Xinhua | Updated: 2022-11-12 17:14
Share
Share - WeChat

Mining rare-earth elements has long been considered a dirty business, as it can lead to water and soil pollution, but a new technology developed by Chinese scientists may reverse the trend, offering a greener alternative for the industry.

Rare-earth elements, especially heavy REEs, are an essential part of many high-tech devices, from the engines of electric cars and smartphones, to LED lights. More than 90 percent of the global heavy REE demand is sourced from ion-adsorption deposits, which form within weathering crusts. However, conventional mining applies excessive usage of chemical agents to recover REEs from these deposits, not only exhibiting low efficiency but also polluting the environment.

Researchers from the Chinese Academy of Sciences' Guangzhou Institute of Geochemistry proposed a new approach in the journal Nature Sustainability earlier this month, showing that employing electrokinetic mining techniques to extract REEs from weathering crusts can be both clean and economical.

Using this approach, researchers generated an electric field by putting electrodes on the top and bottom of a volume of soil. The electrokinetic effect can accelerate the migration of REEs, reducing the need for harmful chemical agents.

To evaluate the feasibility of the new method, they carried out several experiments of different scales. Results suggested that the new method outperformed traditional mining techniques.

For instance, the scaled-up experiments achieved a recovery efficiency of 96 percent within 67 hours by using electrokinetics. Using the conventional technique, it was only 62 percent at 130 hours.

The difference between the impact of the old and the new approach was even more significant in an on-site field test: Using electrokinetics can achieve a recovery efficiency higher than 90 percent, an 80 percent decrease in polluting agent usage and a 70 percent reduction in metallic impurities.

The study confirmed that this novel electrokinetic technology enabled green, efficient and selective recovery of REEs. Researchers also noted that the new method has great potential for use in the mining of other critical metals under conditions in which the metals exist in ionic states.

Most Popular
Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 色视频网站大全免费 | 在线观看免费视频网站色 | 欧美另类在线视频 | 韩国免费a级毛片 | 一级特黄特黄的大片免费 | 国内精品99| 一区二区三区影视 | 久久九九视频 | 国产亚洲精品自在线观看 | 好吊妞国产欧美日韩视频 | 国产精品欧美视频另类专区 | 久久久网久久久久合久久久久 | 欧美一级特黄aaaaaa在线看片 | 一级特色黄大片 | 久草视频免费在线 | 国模午夜写真福利视频在线 | 久久国产精品岛国搬运工 | 看性过程三级视频在线观看 | 亚洲精品国产一区二区三区在 | 中文字幕在线一区二区三区 | 国产资源免费 | 久99频这里只精品23热 视频 | 亚洲一区亚洲二区 | 国产年成美女网站视频免费看 | 国产亚洲精品一区二区在线观看 | 国产成人精品免费视频网页大全 | a级毛片高清免费视频 | 97人摸人人澡人人人超一碰 | 美女超爽久久久久网站 | 99久久精品费精品国产一区二 | 美国的毛片免费的 | 午夜丝袜美腿福利视频在线看 | 日韩在线视频免费 | 99草精品视频 | 中文精品99久久国产 | 欧美国产在线视频 | 一级毛片不卡 | 国产精品一区二区久久精品涩爱 | 亚洲欧洲国产成人综合一本 | 成人午夜免费在线观看 | 国产精品亚洲一区二区三区在线观看 |