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News Link • Water Issues-Water Fluoridation

New desalination membrane produces both drinking water and lithium

• newatlas.com By Michael Irving

Now, a team of scientists from Australia and the US has developed a new water desalination technique that can not only make seawater fresh enough to drink, but recover lithium ions for use in batteries.

The key to the process is metal-organic frameworks (MOFs), which boast the largest internal surface area of any known material. Unfolded, a single gram of the material could theoretically cover a football field, and it's this intricate internal structure that makes MOFs perfect for capturing, storing and releasing molecules. Recent research into the material could see MOFs put to work as carbon emission sponges, high-precision chemical sensors, and urban water filters.

Currently, reverse osmosis membranes are the most commonly-used technology for water filtration, and they work on a fairly simple principle. The membrane's pores are large enough for water molecules to pass through, but too small for most contaminants.

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