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From seawater to freshwater with a nanotechnology filter
Date:5/31/2011

mineral content from the water, it is incredibly inefficient and producing the high pressures is expensive.

Reese has, however, shown that CNTs can realistically expect to have water permeability 20 times that of modern commercial reverse-osmosis membranes, greatly reducing the cost and energy required for desalination. Additionally, CNTs are highly efficient at repelling salt ions, more so because specific chemical groups can be attached to them to create a specific "gatekeeper" function.

As Reese writes, "The holy grail of reverse-osmosis desalination is combining high water-transport rates with efficient salt-ion rejection. While many questions still remain, the exciting potential of membranes of nanotubes to transform desalination and water-purification processes is clear, and is a very real and socially progressive use of nanotechnology."

Also in the June edition:

  • Jonathan Mather from Sharp Laboratories Europe describes the technology behind glasses-free 3D TV
  • Bruce Drinkwater from the University of Bristol, UK, describes how acoustic tweezers may one day allow researchers to make human tissue and fabricate tiny structures by manipulating cells with sound waves


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Contact: Michael Bishop
michael.bishop@iop.org
01-179-301-032
Institute of Physics
Source:Eurekalert

Page: 1 2

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