Subscribe free to our newsletters via your
. Earth Science News .

Subscribe free to our newsletters via your

Water filter for disaster use developed

disclaimer: image is for illustration purposes only
by Staff Writers
Montreal (UPI) Feb 23, 2011
Canadian researchers say they're working on a cheap, portable, paper-based water filter coated with silver nanoparticles for use in emergencies and disasters.

When water supplies are disrupted during events such as floods, tsunamis and earthquakes, diseases like gastroenteritis, giardiasis and even cholera can spread because of a shortage of clean drinking water.

Researchers at McGill University in Quebec have been developing an inexpensive way of filtering water using silver nanoparticles, a university release said Wednesday.

"Silver has been used to clean water for a very long time," chemistry professor Derek Gray says.

"The Greeks and Romans kept their water in silver jugs."

But though silver is used to get rid of bacteria in a variety of settings, from bandages to antibacterial socks, it has never been used systematically to clean water, he said.

Gray and fellow researchers coated thick hand-sized sheets of an absorbent porous paper with silver nanoparticles and then poured live bacteria through it.

Even when the paper contained just a small quantity of silver, the filter was able to kill nearly all the bacteria and produce water that meets standards set by the U.S. Environmental Protection Agency, Gray said.

The filter is not envisaged as a routine water purification system, but rather as a way of providing rapid small-scale assistance in emergency settings, he said.

"It works well in the lab," Gray said. "Now we need to improve it and test it in the field."

Share This Article With Planet Earth DiggDigg RedditReddit
YahooMyWebYahooMyWeb GoogleGoogle FacebookFacebook

Related Links
Water News - Science, Technology and Politics

Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

Nanomaterial filters bacteria from water
Buffalo, N.Y. (UPI) Feb 22, 2011
U.S. researchers say a newly developed nanomaterial could help solve the age-old public health problem of removing harmful bacteria from drinking water. Working with a special kind of polymer called a block copolymer, researchers at the University of Buffalo have synthesized a filter nanomembrane containing pores large enough for water to slip through easily but too small for bacteria, ... read more

NZealand quake refugees swap tales of survival

Lingering trauma one year after deadly Chile quake

Frantic hunt as NZ quake leaves 400 dead, missing

Better Mapping Of Human Settlements Supports Disaster Management

Turning To Nature For Inspiration

Apple stockholders keep CEO succession plan private

HP stock slides on trimmed earnings forecast

Plants That Can Move Inspire New Adaptive Structures

Nanomaterial filters bacteria from water

Brown Tide Culprit Sequenced: Genome Of The First Of Algal Bloom Species

Water filter for disaster use developed

Oldest Water On Earth

Carbon Sink At South Pole Has Grown Recently

Massive iceberg shears off glacier after quake hit

Climate change halves Peru glacier: official

Shifting Biomes In Alaska

Genetically modified crops on the rise

Multiple Approaches Necessary To Tackle World's Food Problems

EU agrees to allow traces of GM crops in EU animal feed

Two New Plants Discovered In Spain

No signs of life as NZ quake toll rises to 113

Distressed residents flee New Zealand quake city

Child dies under volcanic ash cloud in Philippines

Mud volcano set to erupt for quarter-century - scientists

Ivory Coast envoy reports for duty

New 'environment governance' on agenda in Nairobi

Nigerian troops uncover weapons cache

Three soldiers killed by Casamance rebels: military source

Remains of Ice Age child found in Alaska

Men's cosmetics take off in China

Study: Low self-esteem increases bias

Testing The Limits Of Where Humans Can Live

The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement