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Power Biotech Science

New Material Can Soak Up Uranium From Seawater (acs.org) 87

A new adsorbent material "soaks up uranium from seawater, leaving interfering ions behind," reports the ACS's Chemical & Engineering News, in an article shared by webofslime: The world's oceans contain some 4 billion metric tons of dissolved uranium. That's roughly 1,000 times as much as all known terrestrial sources combined, and enough to fuel the global nuclear power industry for centuries. But the oceans are so vast, and uranium's concentration in seawater is so low -- roughly 3 ppb -- that extracting it remains a formidable challenge... Researchers have been looking for ways to extract uranium from seawater for more than 50 years...

Nearly 20 years ago, the Japan Atomic Energy Agency (JAEA) confirmed that amidoxime-functionalized polymers could soak up uranium reliably even under harsh marine conditions. But that type of adsorbent has not been implemented on a large scale because it has a higher affinity for vanadium than uranium. Separating the two ions raises production costs. Alexander S. Ivanov of Oak Ridge National Laboratory, together with colleagues there and at Lawrence Berkeley National Laboratory and other institutions, may have come up with a solution. Using computational methods, the team identified a highly selective triazine chelator known as H2BHT that resembles iron-sequestering compounds found in bacteria and fungi.... H2BHT exhibits little attraction for vanadium but has roughly the same affinity for uranyl ions as amidoxime-based adsorbents do.

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New Material Can Soak Up Uranium From Seawater

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  • by gweihir ( 88907 ) on Saturday February 23, 2019 @04:55PM (#58170348)

    .. is enough for "centuries", then what we have should run out in less than a year? Seems somebody has trouble with numbers. While Uranium that can be mined is not nearly as plentiful as the nuclear-mafia wants you to believe, it should be enough for a few decades, given that no new reactors are constructed.

    • by careysub ( 976506 ) on Saturday February 23, 2019 @05:47PM (#58170512)

      The world's oceans contain about 4.5 billion tonnes of uranium. The world consumes 65,000 tonnes of uranium a year. There are thus 70,000 years worth of uranium at current consumption rates in the ocean. The world land reserves of uranium are estimated at 7.6 million tonnes at a recover cost of $260/kg, this is 115 years worth.

      The lowest current estimated cost of recovering uranium from seawater is something like $300/kg, a price point at which the cost of the uranium still has little influence on fission power economics, and not much higher than that cost of recovery cited above for the 115 year reserve on land. The current market price of uranium right now is about $80/kg (element, not oxide), but it fluctuates a lot. The recent trendline is something like $100/kg, though in the past it has spiked as high as $400/kg (current dollars).

      There no need for uranium-for-seawater in the foreseeable future (i.e. this century), and as long as mined uranium can be had for $100/kg or so there will be no steps taken to commercialize seawater extraction. Research on the topic, like this one, continues with refinements in extraction chemistry and efficiency as the focus, but not looking at the most cost-efficient extraction method, since that is the realm of commercialization. When land uranium resources start to run out, and prices rise, that is when all of the research on seawater extraction will be put to use, with a new focus on industrial operation cost and efficiency.

      We are never going to run out of uranium. Even with no breeder reactors, or any thorium reactors.

      • by blindseer ( 891256 ) <blindseer@earthli[ ]net ['nk.' in gap]> on Saturday February 23, 2019 @06:17PM (#58170582)

        What you say is likely true, if we assume that there is a free trade of uranium. A nation with less than friendly relations with much of the world might have trouble getting uranium if their local geology is lacking in uranium. Access to the sea though means a constant supply of uranium at a very constant price. Extraction of uranium at any rate which we could conceive of is nothing compared to the size of the ocean, the concentration of uranium salts in the ocean will not be affected (on any human time frame).

        As I recall nations such as India, Iran, and Japan don't have a lot of uranium that they can mine. At least not at the prices you gave. If this process gets to even double the market rate on what many pay now then it can still be viable because of costs due to transport and trade regulations.

        There's also some possibility of another spike in uranium. I recall a co-worker being quite excited when he saw uranium prices spike. He was crushed later when he found out why. A mine he had invested in had been flooded with water, some weather event and/or mechanical problem at the site. This put a dent in future expectations of supply and that made uranium prices climb. If there's a technology on uranium extraction from seawater then we will see a ceiling on uranium prices as people build such facilities to back up their terrestrial mining. Oil people do this all the time, they drill for less than ideal oil because they need that well drilled before prices spike. If prices spike and there's no oil to sell then they can't cash in.

        Investments in uranium from seawater would certainly happen if a government sees uranium supplies as a national security interest. Governments will invest in this even if the pay off later is little to nothing. Not having to beg others for energy gives a lot more security than investing in more battle tanks and bombers.

      • by Anonymous Coward

        65,000 tons of uranium a year, of which we are extracting <1% of the energy. Good news: we can recycle it and extract all of the energy from "spent" fuel, after which nothing remains but short-lived fission products. The technology exists, we just don't use it. (Though the Russians do have breeder reactors in commercial operation.)

        Moreover, the 4.5 billion tons of U in seawater are an equilibrium concentration, which is constantly being replenished by the earths crust, so even that is vastly underestimat

    • Seems somebody has trouble with numbers.

      And ... that somebody is you.

      In Economics 101, when a supply curve shifts to a lower price point (e.g. due to a technology such as this one) the demand curve almost always shifts to higher demand. And so every plenitude uptick is slated to run out in about a hundred years, no matter how much greater the new plenitude over the incumbent what-have-you-done-for-me-lately.

      This phenomena is especially well known in the department of traffic congestion, which is why you can

  • I mean, it's cool that you can pull nuclear fuel from the ocean, but it still has to be enriched as presumably aqueous uranium has the same abysmal percentage of U-235 as the terrestrial ores that are already being mined. Now figure it out how to enrich it at the same time and watch as the world destroys itself building nukes from ocean water.
    • Re: (Score:2, Informative)

      by mykepredko ( 40154 )

      Shit you're right. Good thing there aren't any methods for separating U-238 from U-235

      Oh wait, there seems to be six or more: https://en.wikipedia.org/wiki/... [wikipedia.org]

    • I mean, it's cool that you can pull nuclear fuel from the ocean, but it still has to be enriched as presumably aqueous uranium has the same abysmal percentage of U-235 as the terrestrial ores that are already being mined.

      The uranium in seawater does in fact have the same isotopic composition as that mined from the dirt. It's this way because the uranium in the water got there by erosion being dissolved as a salt. The uranium does not need to be enriched to be used as fuel, there are heavy water reactors capable of using natural uranium as fuel. Canada has been using natural uranium as fuel for decades, and sold their designs to India, China, and perhaps other nations, from which local variants have been built. This is n

      • When you gas up your car do you think about how many people could be burned to ash if we used that fuel to bomb cities instead of use it to power the transportation sector of the world?

        Can't speak for anyone else, but I think about how much devastation follows this unnecessary use of fossil fuels. We could make 100% of our transportation fuel needs from algae grown on seawater by allocating a relatively small portion of desert. Well, we could have. Now that climate change is causing feet of snow to fall on Arizona, and the like, it probably wouldn't work so well as it might have.

        • Can't speak for anyone else, but I think about how much devastation follows this unnecessary use of fossil fuels. We could make 100% of our transportation fuel needs from algae grown on seawater by allocating a relatively small portion of desert.

          We could also make all of our transportation fuel by hydrocarbon synthesis driven by nuclear fission. This is not new technology. We figured out how to get economically viable energy from fission in the 1950s. We figured out how to synthesize hydrocarbons suitable for use as aircraft fuel since the 1930s. There's been a lot of effort in combining the two by the US Navy but our congresscritters seem more interested in burning money on more failures in solar power projects and electric airplanes.

          Well, we could have. Now that climate change is causing feet of snow to fall on Arizona, and the like, it probably wouldn't work so well as it might have.

          Right, gl

          • Re: (Score:2, Flamebait)

            by drinkypoo ( 153816 )

            Right, global warming causes snow in Arizona. Tell me something, what kind of weather or climate event would there have to be to disprove the theory of human caused global warming from burning fossil fuels?

            A year-on-year decrease in global temperatures, obviously.

            The climate changes, and I can't seem to find anyone to dispute that. If you want me to believe your theory then first I need to see the theory explained in a way that is falsifiable.

            If you still find greenhouse gases confusing, there's really no explaining the situation to you.

            I know what is holding up synthetic fuels. It is the Democrat "Green New Deal" that denies us access to nuclear power.

            That's a seriously stupid thing to say on multiple levels, and this is my surprised face. First level, nuclear power is unprofitable, it would make more sense to get the power from renewables. Second level, nuclear power was unprofitable and unpopular before the "Green New Deal" was proposed, but you're blaming it anyway. That's because you're a troll.

            • Re: (Score:3, Informative)

              by blindseer ( 891256 )

              Read this:
              https://www.statesman.com/news... [statesman.com]

              And this:
              https://thehill.com/opinion/en... [thehill.com]

              Then go on about how renewable energy makes more economic sense than nuclear power. Let's assume that nuclear power is not profitable now. What happens as energy prices continue to rise from government mandates for renewable energy like these? At some point those lines cross and nuclear power becomes profitable again.

              Also, it took decades of investment, private and public, in wind and solar energy to bring the price down

              • Then go on about how renewable energy makes more economic sense than nuclear power.
                All over the world wind and solar is cheaper than nuclear.
                You must live in a third world country with no regulations if nuclear is cheaper at your place.

          • We figured out how to synthesize hydrocarbons suitable for use as aircraft fuel since the 1930s.
            Yes, and that fuel costs 3 times as much as fuel at a gas station. It is/would only be a viable solution for carrier based air crafts because refueling them from a gas station costs 4 times as much (due to transportation) as fuel costs at a gas station.

            No idea why you link youtube videos when you are obviously never watching them ...

            For civil usage, gas prices have to quadruple until synthetic fuels, made from nu

        • Re: (Score:2, Informative)

          by sfcat ( 872532 )

          When you gas up your car do you think about how many people could be burned to ash if we used that fuel to bomb cities instead of use it to power the transportation sector of the world?

          Can't speak for anyone else, but I think about how much devastation follows this unnecessary use of fossil fuels. We could make 100% of our transportation fuel needs from algae grown on seawater by allocating a relatively small portion of desert. Well, we could have. Now that climate change is causing feet of snow to fall on Arizona, and the like, it probably wouldn't work so well as it might have.

          The algae keep dying off at certain levels of scale. Also, it has to be economical and its not clear that these types of algae based bio-fuels will be economical as there is still a fair amount of effort to keep the algae alive and growing in a changing environment at scale. Plus there is the same energy density problems of bio-fuels that plague all the other renewables. Yes climate change is real. But you don't seem to be reacting as if it is because you keep telling us to wait on unicorns instead of l

          • The algae keep dying off at certain levels of scale.

            Could you be more specific? Say, providing any information at all? If the algae die, you throw them in the centrifuge and start making biofuel. It's not a problem.

            Nature colonizes open pools with an algae appropriate to the local climate, and whatever water you're using. Problems with algal die-offs are related to using special algaes, which are not necessary unless you're trying to use closed bioreactors.

            Also, it has to be economical and its not clear that these types of algae based bio-fuels will be economical

            Ye olde biofuels study [nrel.gov] showed that it would be possible to get economic results using seawater, though

            • by sfcat ( 872532 )

              The algae keep dying off at certain levels of scale.

              Could you be more specific? Say, providing any information at all?

              Well, something is very wrong with the process. Here is more info [greentechmedia.com]. All those biofuel companies are pivoting away from algae. They know something we don't. As I said, current speculation on what it is is that you can't keep the algae alive at scale. Algal blooms in the wild often poison themselves and everything else in different ways after a time, perhaps that's the issue. Maybe its something else, cost of maintaining the pools perhaps. Either way, it doesn't work. Its yet another unicorn.

            • The algae farms have several issues. The difference between now and the 1980s is that the current efforts involved genetic engineering of the algae proper. See work done at UC Berkeley for example.

              Still, yes, they have issues being grown in large quantities.

      • by sfcat ( 872532 ) on Saturday February 23, 2019 @07:07PM (#58170712)

        Canada has been using natural uranium as fuel for decades, and sold their designs to India, China, and perhaps other nations, from which local variants have been built. This is not new technology and not rare either.

        CANDU reactors have a positive void coefficient meaning if they start to boil off their water (just bubbles form, not fill boil), they overheat quickly. This is very dangerous. One of the few sensible US nuclear regulations is not allowing reactors with positive void coefficients. It is quite nice that they can use raw ore but at the cost of having to use heavy water which is really just shifting the problem of enrichment, not fixing it. However, the Canadians usually have more sensible nuclear regulations and hopefully will start licensing MSRs soon.

        Now figure it out how to enrich it at the same time and watch as the world destroys itself building nukes from ocean water.

        By "nukes" I assume you mean nuclear weapons. You do realize what many wars have been fought over, do you not? Resources. People fight over water, fuel, food, and so on. Access to cheap nuclear fission power by extracting uranium from seawater could mean an end to scarcity. Well, there will always be scarcity of something, just not a scarcity of energy. Energy that can be used to produce water, food, shelter, and clothing. That's not saying there won't be wars, people fight for other reasons. Many such people fight because their god tells them to convert or kill. If they were more concerned about live and let live then they'd be far better off and not feel such jealousy of other people having greater wealth, freedom, and generally a better standard of living.

        Nuclear energy has as much to do with nuclear weapons as gasoline cars have with napalm. When you gas up your car do you think about how many people could be burned to ash if we used that fuel to bomb cities instead of use it to power the transportation sector of the world? You don't? Maybe that's because peaceful energy is far more valuable than weapons to deny other people of their wealth, property, and lives.

        Well said and spot on...

  • by mykepredko ( 40154 ) on Saturday February 23, 2019 @05:46PM (#58170510) Homepage

    It's amazing how many concepts and technologies have been predicted by early science fiction.

    As soon as I saw the headline, I thought of Arthur C. Clarke's "The man who ploughed the sea" and how it is a cautionary tale for people who think about investing with fast talkers.

  • Lithium is extremely abundant in the sea water. It occurs at about 200 ppb in the ocean. The current sources of Lithium are salt flats and brine puddles in salt flats. So I wondered if a similar polymer can be developed using similar computational methods to extract other valuable metals like Lithium or Gold. Li is the lightest metal and U is the heaviest. So it might not be so easy for Li. Gold it could happen, but probably Gold is not as viable. If a gold extraction polymer is developed, the gold price w
  • by rlauzon ( 770025 ) on Saturday February 23, 2019 @06:20PM (#58170594)
    http://www.gutenberg.org/files/164/164-h/164-h.htm#chap11 [gutenberg.org] "Professor," said Captain Nemo, "my electricity is not everybody's. You know what sea-water is composed of. In a thousand grammes are found 96 1/2 per cent. of water, and about 2 2/3 per cent. of chloride of sodium; then, in a smaller quantity, chlorides of magnesium and of potassium, bromide of magnesium, sulphate of magnesia, sulphate and carbonate of lime. You see, then, that chloride of sodium forms a large part of it. So it is this sodium that I extract from the sea-water, and of which I compose my ingredients. I owe all to the ocean; it produces electricity, and electricity gives heat, light, motion, and, in a word, life to the Nautilus."
  • "That's roughly 1,000 times as much as all known terrestrial sources combined, and enough to fuel the global nuclear power industry for centuries"

    So, 1000 times all known terrestrial sources will power the global nuclear industry for centuries. Which means all known terrestrial sources will last a fraction of a year. An all mined sources should run out tomorrow afternoon.

    Journalists really are stupid people who will never let facts interfere with their storytelling.
  • the sea also contains massive amount of gold, copper, molybdenum, selenium, magnesium..... so what, all these extraction methods won't be useful

  • Run the water through the U adsorbant and then through the one that picks up both. If all the U was picked out first, then vanadium should remain.
  • by CanadianMacFan ( 1900244 ) on Saturday February 23, 2019 @09:31PM (#58171108)

    So it's okay for the US to take Japanese technology but not for anyone to use US technology! /s

  • If reporting on nuclear technology was like reporting on solar, we'd all talk about this idea all week, telling everyone that nuclear power was about to become incredibly cheap as the fuel costs drop to near zero.

    Then if the idea didn't pan out, we'd all pretend we'd never said anything about it, and move on to another nifty-sounding announcement.

  • Is there all of a sudden a safe way to use Uranium? Do We want more meltdowns? Solid reaction rods are not safe and only about 12 percent of the Uranium is used. So We want To store danger Uranium underground forever? We need time to make total reusable resources work. The Thorium reaction cycle is the gateway to save the earth until we know how to make Solar, Wind and the required power storage cost effective and cheep.

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