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

USEUROPEAFRICAASIA 中文雙語Fran?ais
World
Home / World / Americas

Cleaning up water gets a boost from brand new method

By Chris Davis | chinadaily.com.cn | Updated: 2017-05-18 10:04

A new technology has appeared to help China - and everyone - with their water pollution problems.

It comes courtesy of Beijing-born MIT post-doc Xiao Su, his mentor Professor T. Alan Hatton and team, who just won the 2016 MIT Water Innovation Prize, as well as last year's Veraqua Prize, an award focused specifically on water purification methods for pollutants in China.

China faces a diverse range of pollution, Su said in an email to China Daily: Industrial, urban wastewater and agricultural, chemical pollutants such as organics and heavy metals are a major problem, with pharmaceuticals, dyes and personal products present in urban sources or pesticides and herbicides in rural areas.

Cleaning up water gets a boost from brand new method

The big challenge right now, Su explained, is the inefficiency of existing technologies to remove really toxic, yet often diluted contaminants (micropollutants), present at low parts-per-million or -billion levels.

Su and Hatton describe their new approach in the current issue of the journal Energy and Environmental Science.

Their system uses a novel electrochemical process to selectively remove organic contaminants such as pesticides, chemical waste and pharmaceuticals, even when they are present in small - yet still dangerous - concentrations.

The current methods of sifting out such trace amounts of toxins include filtering the water through a membrane, which is expensive and not 100 percent effective, or electrodialysis, which requires high voltages that often produce unwanted side reactions, Su said.

As Hatton put it, "In our case, you can just flip a switch."

In their system, the water flows between chemically treated surfaces that act as positive and negative electrodes and undergo reactions to become positively or negatively charged and can be "tuned" to bind with a specific pollutant. The team used ibuprofen and pesticides to demonstrate their model and removed molecules at parts-per-million concentrations.

Su said their system "can have a key impact in addressing these pollution problems in China, as we provide the necessary selectivity to remove these toxic species across a range of concentrations, even very small".

Su claims their technologies can "achieve dramatically higher, over 100 times more selective, performances".

Using electrochemistry makes the system more sustainable and environmentally friendly, as there is no need for chemical additives or tons of solvents to reboot the operation.

The process can be scaled from home to community. "For home filtration, our system is perfect for removing any trace contaminants coming from tap water," Su said.

"We can also be deployed in small communities of 500-1,000 people, and integrate our systems with solar panels. This way, we can reach remote and rural areas and also ameliorate the cost of electricity," he said.

From a practical point of view, Su said they are working prototypes and exploring pathways to commercialization. "Our timeline is for the first prototypes to be developed by the end of this year, latest mid next-year, and the scale-up process to hopefully lead to a competitive product line by the end of 2018," Su said.

In additional to all the good things the technology can do for the environment, it also shows promise for two other uses - upstream water purification to help recover valuable species and selectively "mining" or "recovering high-value compounds in a chemical or pharmaceutical production plant, where they might otherwise be wasted," Su said.

The researchers have applied for a patent on the new process. "We definitely want to implement this in the real world," Hatton said in a press release.

"We expect our system, ,with some further scale-up development, to make a real difference in helping China conquer their challenges, as an energy efficient, high-performance alternative to conventional pressure or thermally based methods," Su said.

Contact the writer at [email protected]

Most Viewed in 24 Hours
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: 欧美一级va在线视频免费播放 | 亚洲高清视频免费 | 国产精品高清视亚洲一区二区 | 亚洲天堂免费在线视频 | 一级做a爱 一区 | 色色视频免费网 | 毛片免费全部播放一级 | 日韩一区二区在线视频 | 久久国产成人亚洲精品影院老金 | 成 人免费va视频 | 国产深夜福利视频网站在线观看 | 一级女性黄 色生活片 | 国产主播福利片在线观看 | 欧美亚洲国产精品 | 成年男女免费视频网站 | 精品亚洲成a人在线播放 | 国产l精品国产亚洲区久久 国产tv在线 | 国产成人精品高清免费 | 欧美人成一本免费观看视频 | 视频一区 欧美 | 亚洲第一成人天堂第一 | 最全精品自拍视频在线 | 久久国产精品免费看 | 亚洲欧美日韩在线观看二区 | 亚洲国产成人久久综合一 | 美女视频一区二区三区在线 | 国产三级精品久久三级国专区 | 欧美一区二区在线视频 | 亚洲国产精品自产拍在线播放 | 亚洲午夜免费 | 日韩一区二区在线观看 | 九草在线免费观看 | 黄www片 | 精品中文字幕在线观看 | 一级成人黄色片 | 99精品视频免费在线观看 | 欧美69 | 亚洲精品在线看 | 亚洲在线高清 | 一区二区三区欧美在线 | 在线视频欧美日韩 |