Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Nanotube-Based Filter Cleans Drinking Water - Water Treatment: New filtration system removes bacteria and viruses

Environ. Sci. Technol.
MICROBE ZAPPER When the carbon nanotube-based filter catches bacteria (left), it can also kill them through electrolysis (right).
Environ. Sci. Technol.
MICROBE ZAPPER When the carbon nanotube-based filter catches bacteria (left), it can also kill them through electrolysis (right).

Abstract:
For 1 billion people in developing countries, finding clean drinking water is a daily challenge. Now researchers demonstrate a carbon nanotube-based filtration and electrolysis system that can completely remove or inactivate viruses and bacteria from water (Environ. Sci. Technol., DOI: 10.1021/es2000062). Coauthor Chad Vecitis of Harvard University thinks this technology could lead to inexpensive commercial water filters, potentially saving millions every year from diseases and death caused by waterborne pathogens.

Nanotube-Based Filter Cleans Drinking Water - Water Treatment: New filtration system removes bacteria and viruses

Washington, DC | Posted on March 17th, 2011

The key filter in the device is a porous film of multi-walled carbon nanotubes. Compared to other carbon-based filtration techniques, nanotubes have several advantages, Vecitis says, including large surface areas, inherent antimicrobial activity, and resistance to corrosion. By running a small current through the nanotubes and inserting another electrode into the water, the device also can electrolyze water to produce oxygen to kill pathogens.

Vecitis and his colleagues tested their device by pumping suspensions of the bacteria Escherichia coli or of MS2 bacteriophages in a saline solution through the filter assembly. They ran these tests with and without electrolysis.

After one pass through the filter, their device successfully removed all bacteria from the solution, and 99.99% of the viruses. With electrolysis, no viable bacteriophages remained. Since a single virus particle can sicken a person, the researchers consider electrolysis an important step.

Because the electrolysis reaction requires low voltages, portable solar panels could power the device, Vecitis says. To adapt the technology to daily use, he says, the next step would be to create a more-compact device with the capacity to filter 2 to 3 L of water per day, the minimum people need to survive.

####

For more information, please click here

Copyright © ACS

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Evidence mounts for quantum criticality theory: Findings bolster theory that quantum fluctuations drive strange electronic phenomena January 30th, 2015

Everything You Need To Know About Nanopesticides January 30th, 2015

DNA nanoswitches reveal how life's molecules connect: An accessible new way to study molecular interactions could lower cost and time associated with discovering new drugs January 30th, 2015

Crystal light: New light-converting materials point to cheaper, more efficient solar power: University of Toronto engineers study first single crystal perovskites for new solar cell and LED applications January 30th, 2015

Discoveries

Evidence mounts for quantum criticality theory: Findings bolster theory that quantum fluctuations drive strange electronic phenomena January 30th, 2015

Everything You Need To Know About Nanopesticides January 30th, 2015

DNA nanoswitches reveal how life's molecules connect: An accessible new way to study molecular interactions could lower cost and time associated with discovering new drugs January 30th, 2015

Crystal light: New light-converting materials point to cheaper, more efficient solar power: University of Toronto engineers study first single crystal perovskites for new solar cell and LED applications January 30th, 2015

Announcements

Evidence mounts for quantum criticality theory: Findings bolster theory that quantum fluctuations drive strange electronic phenomena January 30th, 2015

Everything You Need To Know About Nanopesticides January 30th, 2015

DNA nanoswitches reveal how life's molecules connect: An accessible new way to study molecular interactions could lower cost and time associated with discovering new drugs January 30th, 2015

Crystal light: New light-converting materials point to cheaper, more efficient solar power: University of Toronto engineers study first single crystal perovskites for new solar cell and LED applications January 30th, 2015

Water

Nanoparticles for clean drinking water January 17th, 2015

Going with the flow January 16th, 2015

Rice's Naomi Halas to direct Smalley Institute: Optics pioneer will lead Rice's multidisciplinary science institute January 15th, 2015

Liquids and glasses relax, too. But not like you thought January 15th, 2015

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE