David Kirkpatrick

September 29, 2008

Nanotech helps in purifying water

Filed under: Business, Science, Technology — Tags: , , , , — David Kirkpatrick @ 12:52 pm

Yet another application of nanotechnology.

From the link:

Adding nanoparticles to a water purifying membrane can double its efficiency, according to a startup company based in Los Angeles. With global water usage on the increase and fresh water in limited supply, the company, NanoH2O, says its novel approach could make such purification technology a viable solution to a growing problem.

Reverse osmosis–feeding water through a semipermeable membrane to filter out impurities–is widely considered to be the most effective way to desalinate water. But it is very energy-intensive, and therefore expensive, because water has to be forced through the membrane under pressure. A key way to reduce the costs involved is to increase the water throughput for the same pressure. But for many years, improvements in membrane technology have been incremental at best, says Jeff Green, NanoH2O founder and CEO.