Monday, August 06, 2012
Graphene Can Improve Desalination Efficiency by Several Orders of Magnitude, Can Do Pretty Much Anything
That said, there are a couple of roadblocks to using graphene for desalination. First of all, if you want to use a graphene filter, it’s important to have a lot of control of the size of the holes in the filter, or more accurately, the variation of the sizes of the holes. Put simply, you need to make sure that all the holes are small enough to keep the salt out if you want to achieve true desalination. When it comes to that level of accuracy, we aren’t quite there on the production side. We are, however, pretty close and getting closer every day. Second, you’ve got to make sure that the filter stays stable under pressure; if it breaches you’re going to lose a lot of process. The standard methods of reinforcing traditional filters should translate pretty easily to graphene though, so all in all it’s looking pretty promising.
I don't know how efficient the graphene filters are but couldn't having several filters at 95% removal of salt get the water to potability? At least enough for use in the growth of salt tolerant rice.
Labels: Sci Fi