Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > A spongy nanomaterial may change the way to monitor water quality

Abstract:
A group of French researchers has developed a nanomaterial that works like a sponge for some water pollutants and allows to measure them easily and quickly.

A spongy nanomaterial may change the way to monitor water quality

Brussels, Belgium | Posted on March 9th, 2012

Heavy metals coming from industrial waste, such as mercury, lead, cadmium, nickel, and zinc are some of the most dreaded pollutants in water, and EU laws strictly limits their concentration in the water we drink. Measuring these pollutants is commonplace but cumbersome. A sample of water has to be collected and taken to a laboratory for analysis, and results typically require days or weeks.

A group of researchers from the Ecole Polytechnique in Palaiseau, near Paris, have developed a tiny film that could speed up the process dramatically. The "nano-factor" is within the film itself: millions of nanopores that trap metals like a sponge, making them immediately available for analysis. Their new system is portable, provides immediate results, and therefore may change the way we monitor water quality.

François Plais is an engineer with industry experience at the Ecole Polytechnique and a member of the team that developed the sensor.

How does your system work?

At the beginning we were developing a membrane to filter water, not to analyse it. Then we realized that we could change the structure of the membrane to work as a trap for metal ions. The two ideas are similar and opposite: a filtering membrane is a tiny sheet of polycarbonate with holes of a diameter of 30-40 nanometers, called nanopores, that let the water flow and filter out impurities. Our sensor membrane, instead, is made with another polymer called PVDF, and with nanopores that trap water and any metal ions that come with it. Basically, it works like a sponge. The system also works as a sensor, because metals ions change the electrical properties of the membrane. If we apply two electrodes at the membrane, we can measure the concentration of metals with a standard electrochemical test, which is relatively straightforward.

What are the advantages compared to the existing technologies?

With our system you don't need to bring a sample to the laboratory, because you use it on site. At the same time, our data show that the sensitivity and accuracy are comparable to the current laboratory standards.

Can you mention some possible applications ?

Our system may be ideal to assess the quality of drinking water from lakes, reservoirs or rivers, for example, or to monitor pollution from industrial waste. By providing immediate results, it could really change the way we monitor water quality, as far as heavy metals are concerned.

What are you going to do next?

We still need to validate our laboratory results in a real-world setting. With the help of Pronano, we have found a partner that will allow us to do that, and we are now working on this new phase of the project.

####

For more information, please click here

Contacts:
Elisabeth Schmid
Phone: + 39 02 700 25 71
Fax: + 39 02 700 25 40

Copyright © youris.com

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

New technique for exploring structural dynamics of nanoworld: Developed in a Nobel laureate's laboratory at Caltech, hybrid approach allows ultrafast EM analysis of materials, showing tiny electronic changes in individual atoms within a material on ultrafast time scales April 28th, 2015

When mediated by superconductivity, light pushes matter million times more April 28th, 2015

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

Self-assembling biomaterial forms nanostructure templates for human tissue formation April 27th, 2015

Sensors

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

ORNL reports method that takes quantum sensing to new level April 23rd, 2015

New class of 3D-printed aerogels improve energy storage April 22nd, 2015

‘Oxford Instruments Young Nanoscientist India Award 2015’ to Prof. Arindam Ghosh April 20th, 2015

Discoveries

New technique for exploring structural dynamics of nanoworld: Developed in a Nobel laureate's laboratory at Caltech, hybrid approach allows ultrafast EM analysis of materials, showing tiny electronic changes in individual atoms within a material on ultrafast time scales April 28th, 2015

When mediated by superconductivity, light pushes matter million times more April 28th, 2015

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

More is less in novel electronic material: Adding electrons actually shrinks the system April 27th, 2015

Announcements

New technique for exploring structural dynamics of nanoworld: Developed in a Nobel laureate's laboratory at Caltech, hybrid approach allows ultrafast EM analysis of materials, showing tiny electronic changes in individual atoms within a material on ultrafast time scales April 28th, 2015

When mediated by superconductivity, light pushes matter million times more April 28th, 2015

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

Environment

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

Nanoparticles Used to Improve Mechanical, Thermal Properties of Cellulose Fibers April 23rd, 2015

Young NTU Singapore spin-off clinches S$4.3 million joint venture with Chinese commercial giant March 23rd, 2015

New processing technology converts packing peanuts to battery components March 22nd, 2015

Water

Quantum model reveals surface structure of water: National Physical Laboratory, IBM and Edinburgh University have used a new quantum model to reveal the molecular structure of water's liquid surface April 20th, 2015

Dais Analytic Corporation Appoints Eliza Wang to Board of Directors: Company's Newest Director Brings Expertise in Commercial and Legal Matters Both in the United States and China; Joins on the Heels of Successful Business Development Trade Mission to China April 18th, 2015

Iranian Scientists Produce Magnetic Recyclable Photocatalyst to Purify Polluted Water April 8th, 2015

Water makes wires even more nano: Rice University lab extends meniscus-mask process to make sub-10 nanometer paths April 6th, 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