Our Briny Nuclear Future

With a bonus life-imitates-art use of adsorbents: Uranium From Seawater Could Keep Our Lights On for 13,000 Years

We have 4.5 billion tons of uranium in seawater. Half of that amount is enough to power nuclear plants worldwide for 6,500 years.

However, unfortunately, the costs of extracting uranium from seawater is three times the current cost of uranium mined from land. That said, researchers believe this source may one day be critical to sustaining our energy needs, and to that end, efforts to extract uranium from the seas began in the 1960’s. And our efforts have continued from there…

To begin, extracting seawater uranium is harder than mining from land reserves as it involves a process called “adsorption,” in which atoms, ions, or molecules adhere to a surface. Scientists have been designing different materials to serve as that surface that, when submerged in seawater, will “adsorb” uranium and hold it for extraction.

Keeping these materials cost-efficient is important in relation to keeping the costs of seawater uranium low. Now, the DOE team has developed new adsorbents that brought the costs of seawater uranium extraction down by three to four times and in just five years.

Note that this is in addition to the vast stockpiles of depleted uranium we have from Cold War nuclear weapons production, which (along with spent fuel from conventional reactors) can be used in CANDU-type plants.

So why are we wrecking the environment mining and refining rare-earth metals, making toxic and short-lifetime photovoltaics, and covering pristine landscapes with windmills and PV panels?

One thought on “Our Briny Nuclear Future

  1. RMAU

    The findings suggest the brine solutions are more abundant than previously assumed and may have implications for the planetary protection strategies followed by the sponsors of future Mars landers as well as the design and operations of spacecraft that must contend with destructive chlorine bearing brines, according to the researchers.

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