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A New Easy Course of Extracts Beneficial Compounds From Seawater

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A New Easy Course of Extracts Beneficial Compounds From Seawater

Researchers can isolate magnesium feedstocks from the ocean, essential for renewable vitality purposes. Credit score: Cortland Johnson | Pacific Northwest Nationwide Laboratory

Magnesium salt is extracted from Sequim seawater utilizing a novel flow-based method.

Folks have been utilizing salts from the ocean, like desk salt, since prehistoric instances. Whereas desk salt is essentially the most simply obtained, seawater is a wealthy provide of different minerals, and researchers are investigating which of them could also be extracted from the ocean. Magnesium is one in all these minerals that’s ample within the sea and is turning into increasingly helpful on land.

Magnesium has rising makes use of in sustainability, equivalent to carbon seize, low-carbon cement, and potential next-generation batteries. These makes use of are reviving curiosity in home magnesium manufacturing. At present, salt lake brines, a few of that are threatened by droughts, are utilized in an energy-intensive course of in america to supply magnesium. The Division of Vitality included magnesium on its just lately launched record of crucial supplies for home manufacturing.

The laboratory-scale stream gadget for extracting magnesium salt. Credit score: Qingpu Wang | Pacific Northwest Nationwide Laboratory

Researchers at Pacific Northwest National Laboratory (PNNL) and the University of Washington (UW) have found a easy methodology to separate a pure magnesium salt, a feedstock for magnesium metallic, from seawater. Their findings are detailed in an paper that was just lately revealed within the journal Environmental Science & Know-how Letters. Their progressive strategy  flows two options side-by-side in an extended stream. The method, referred to as the laminar coflow strategy, makes use of the boundary that’s constantly reacting on account of the flowing options. The system by no means achieves equilibrium since new options are at all times being launched.

This methodology performs a brand new trick with an outdated course of. Within the mid-20th century, chemical firms efficiently created magnesium feedstock from seawater by mixing it with sodium hydroxide, generally referred to as lye. The ensuing magnesium hydroxide salt, which provides the antacid milk of magnesia its title, was then processed to make magnesium metallic. Nonetheless, the method ends in a fancy combination of magnesium and calcium salts, that are exhausting and expensive to separate. This current work produces pure magnesium salt, enabling extra environment friendly processing.

“Usually, individuals transfer separations analysis ahead by growing extra difficult supplies,” mentioned PNNL chemist and UW Affiliate Professor of Supplies Science and Engineering Chinmayee Subban. “This work is so thrilling as a result of we’re taking a very totally different strategy. We discovered a easy course of that works. When scaled, this course of might assist drive the renaissance of U.S. magnesium manufacturing by producing major feedstock. We’re surrounded by an enormous, blue, untapped useful resource.”

Seawater from the PNNL-Sequim campus fueled this analysis undertaking. Credit score: Andrea Starr | Pacific Northwest Nationwide Laboratory

From Sequim water to stable salt

Subban and the workforce examined their new methodology utilizing seawater from the PNNL-Sequim campus, permitting the researchers to benefit from PNNL amenities throughout Washington State.

“As a Coastal Sciences workers member, I simply referred to as a member of our Sequim chemistry workforce and requested a seawater pattern,” mentioned Subban. “The following day, we had a cooler delivered to our lab in Seattle. Inside, we discovered chilly packs and a bottle of chilled Sequim seawater.” This work represents the collaboration that may occur throughout PNNL’s Richland, Seattle, and Sequim campuses.

Within the laminar coflow methodology, the researchers stream seawater alongside an answer with hydroxide. The magnesium-containing seawater rapidly reacts to type a layer of stable magnesium hydroxide. This skinny layer acts as a barrier to answer mixing.

“The stream course of produces dramatically totally different outcomes than easy answer mixing,” mentioned PNNL postdoctoral researcher Qingpu Wang. “The preliminary stable magnesium hydroxide barrier prevents calcium from interacting with the hydroxide. We are able to selectively produce pure stable magnesium hydroxide without having extra purification steps.”

The selectivity of this course of makes it notably highly effective. Producing pure magnesium hydroxide, with none calcium contamination, permits researchers to skip energy-intensive and costly purification steps.

Sustainability for the longer term

The brand new and mild course of has the potential to be extremely sustainable. For instance, the sodium hydroxide used to extract the magnesium salt will be generated on-site utilizing seawater and marine renewable vitality. Eradicating magnesium is a crucial pre-treatment for seawater desalination. Coupling the brand new course of with current applied sciences might make it simpler and cheaper to show seawater into freshwater.

The workforce is especially enthusiastic about the way forward for the method. Their work is the primary demonstration of the laminar coflow methodology for selective separations. This new strategy has many extra potential purposes, however extra work must be executed to know the underlying chemistry of the method. The information hole affords new potentialities and analysis instructions for powering the blue economic system.

“We wish to take this work from the empirical to the predictive,” mentioned PNNL supplies scientist Elias Nakouzi. “There may be an thrilling alternative to develop a basic understanding of how this course of operates whereas making use of it to essential issues like creating new vitality supplies and reaching selective separation of hard-to-separate ions for water remedy and useful resource restoration.”

Reference: “Stream-Assisted Selective Mineral Extraction from Seawater” by Qingpu Wang, Elias Nakouzi, Elisabeth A. Ryan and Chinmayee V. Subban, 31 Might 2022, Environmental Science & Know-how Letters.
DOI: 10.1021/acs.estlett.2c00229

The revealed research was supported by the PNNL Laboratory Directed Analysis and Growth program. Elisabeth Ryan of UW was additionally a co-author of the research. The present improvement of this expertise is supported by the Division of Vitality, Workplace of Vitality Effectivity and Renewable Vitality, Water Energy Applied sciences Workplace beneath the Marine Vitality Seedlings Program.




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SpaceX’s Starlink and different satellite tv for pc web suppliers are making gentle air pollution worse for astronomers

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SpaceX’s Starlink and different satellite tv for pc web suppliers are making gentle air pollution worse for astronomers

The swift rise of web satellites, forming megaconstellations, and accumulating area junk are already beginning to mess with astronomers’ analysis. The issue is rising exponentially, scientists warn in a collection of papers printed not too long ago within the journal Nature Astronomy. And so they need regulators to do one thing about it.

The swarm of satellites functioning in low Earth orbit has greater than doubled since 2019, when space-based internet initiatives actually began to take off. That 12 months, SpaceX and OneWeb launched their first batches of satellites with the objective of offering international web protection. Orbiting the planet at a better vary than different satellites is meant to make these companies sooner, reducing down how far indicators must journey to and from Earth. The tradeoff is that at such an in depth vary, firms want much more satellites to cowl the entire planet.

All that gear makes light pollution worse, which then makes it tougher for astronomers to see into the depths of our universe. Satellite tv for pc trails additionally photobomb telescopic observations.

“We’re witnessing a dramatic, elementary and maybe semi-permanent transformation of the night time sky.”

“In solely three years, satellite tv for pc megaconstellations have turn out to be an more and more severe risk to astronomy,” says a perspective paper printed in Nature Astronomy yesterday. “We’re witnessing a dramatic, elementary and maybe semi-permanent transformation of the night time sky with out historic precedent and with restricted oversight.”

The numbers are fairly staggering. There are some 9,800 satellites in orbit round Earth right now, round 7,200 of that are nonetheless functioning. By 2030, the variety of satellites cluttering low Earth orbit might develop to 75,000, according to the European Southern Observatory. SpaceX alone has plans to launch 42,000 satellites for its Starlink web service.

Astronomers have been already ringing alarm bells when SpaceX launched its first 60 Starlink satellites in 2019. Satellites and leftover particles from spacecraft mirror and scatter daylight, which has made the night time sky brighter, according to a 2021 study. And in contrast to Earth-bound sources of sunshine air pollution that are usually concentrated round brightly lit cities, gentle air pollution from area can have an effect on your entire planet’s view of the cosmos.

The authors of the angle paper calculated what impression that elevated brightness would have on a major survey of the night time sky deliberate to begin in 2024 on the Vera Rubin Observatory in Chile. Information from the survey is anticipated to yield new insights into how the Milky Approach was shaped, the properties of darkish matter and darkish vitality, and even the trajectories of asteroids that would probably be headed towards Earth. However the observatory’s discoveries could possibly be impeded by the proliferation of satellites, in accordance with the paper. Particularly, brighter night time skies result in a big loss in effectivity and will price the venture hundreds of thousands of {dollars}.

Gentle mirrored by objects in low Earth orbit would improve the background brightness for the examine by 7.5 p.c by 2030 in comparison with an unpolluted night time sky. That interference might trigger the venture’s prices to balloon by practically $22 million, the researchers discovered. That’s as a result of, with a brighter night time sky, researchers have to extend publicity instances to identify faraway objects. And scientists would possibly miss extra faint objects in a brighter sky, the paper warns. Rising prices and competitors for telescope time might additionally make it harder for astronomers from smaller establishments and underrepresented backgrounds to conduct their analysis.

Photobombing satellites are one other rising drawback for astronomers. Satellite tv for pc trails appeared in 2.7 p.c of pictures taken with an 11-minute publicity time by the Hubble telescope between 2002 and 2021, in accordance with one other article printed in the identical journal earlier this month. That determine might rise to as a lot as 50 p.c of pictures by the 2030s. Equally, 30 p.c of the photographs taken within the Vera Rubin Observatory’s survey might comprise a satellite tv for pc path if SpaceX succeeds in sending 42,000 satellites into area.

“Who shall be left holding the invoice for such injury in unregulated terrain?”

SpaceX didn’t reply to a request for remark by The Verge. However in January, the Nationwide Science Basis introduced an agreement with SpaceX to work collectively to restrict the corporate’s impression on astronomy, which included suggestions to scale back the optical brightness of its satellites. The corporate printed its personal paper final 12 months that describes its efforts to design satellites that reflect less light.

Tweaks to satellite tv for pc design haven’t totally eased researchers’ considerations. These sorts of adjustments would possibly make satellites much less seen in pictures by decreasing streak brightness. However they may pose new issues as a result of darker objects can seem brighter in infrared and submillimeter wavelengths, in accordance with the angle authors. Nor will new designs repair issues brought on by small chunks of particles, that are accountable for lots of the rise in night time sky brightness. Persevering with to crowd lower-Earth orbit with satellites solely will increase the chance of unintended collisions that create extra particles.

For all these causes, governments want to begin cracking down on satellite tv for pc launches, the researchers argue. A comment paper printed yesterday in the identical journal goes so far as to say, “Now could be the time to contemplate the prohibition of mega-constellations.”

One more paper within the journal makes the case for safeguarding area as a shared setting like folks would possibly on Earth. That might embody mandated environmental assessments for satellites and coordinated worldwide regulation, the paper says. With out considering via methods to mitigate dangers early on, College of San Francisco professor Aparna Venkatesan writes in Nature Astronomy, “Who shall be left holding the invoice for such injury in unregulated terrain?”




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Intel graphics chief Raja Koduri leaves after 5 years battling Nvidia and AMD

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Intel graphics chief Raja Koduri leaves after 5 years battling Nvidia and AMD

After 5 years making an attempt to make Intel right into a competitor for Nvidia and AMD within the realm of discrete graphics for players and past — with restricted success — Raja Koduri is leaving Intel to kind his personal generative AI startup.

Intel hired him away from AMD in 2017, the place he was equally in command of the complete graphics division, and it was an thrilling get on the time! Not solely had Intel poached a chief architect who’d just gone on sabbatical however Intel additionally revealed that it did so as a result of it wished to construct discrete graphics playing cards for the primary time in (what would turn out to be) 20 years. Koduri had beforehand been poached for equally thrilling initiatives, too — Apple employed him away from AMD forward of a formidable string of graphics enhancements, and then AMD brought him back once more in 2013.

Intel has but to convey actual competitors to the discrete graphics card area as of Koduri’s departure. You couldn’t purchase its first attempts, and we called its first commercial gaming GPUs “impressive but early,” whereas noting driver points and one missing feature after they arrived in 2022. Up to now, they solely make sense for mainstream 1080p gaming — and solely then as a result of Intel priced them effectively. Intel set expectations low for those cards, and it’s a great factor it did. However the firm has a protracted GPU roadmap, so it’s attainable issues get higher and extra aggressive in subsequent gens. It took quite a bit longer than 5 years for Nvidia and AMD to make it that far.

By the point Koduri left, he wasn’t simply in command of graphics but in addition Intel’s “accelerated computing” initiatives, together with issues like a crypto chip.

Now, in accordance to Intel CEO Pat Gelsinger’s tweet, he’ll be helming a startup creating software program “round generative AI for gaming, media & leisure.”




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Beats is getting ready new ‘Studio Buds Plus’ with extra highly effective noise cancellation

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Beats is getting ready new ‘Studio Buds Plus’ with extra highly effective noise cancellation

Beats is getting ready to launch an upgraded model of its wi-fi Studio Buds. Within the newest iOS 16.4 beta launched as we speak, 9to5Mac uncovered details about new “Beats Studio Buds Plus” earbuds and pictures revealing a black and gold end. The design is essentially an identical to the original Beats Studio Buds launched in 2021.

The Verge has realized from individuals acquainted with the corporate’s plans that the upcoming earbuds will characteristic extra highly effective energetic noise cancellation and an improved transparency mode in comparison with the unique Studio. Just like the primary mannequin, the Studio Buds Plus will not comprise an Apple audio chip just like the H1. Nor will they embrace automated machine switching between Apple gadgets.

For those who’re after these Apple ecosystem options, it’s nonetheless higher to stay with the costlier Beats Match Professional earbuds — or AirPods. The Studio Buds are supposed to be considerably platform agnostic and are meant to enchantment to each iOS and Android prospects. Some individuals discover them to be extra snug than the corporate’s different buds. The originals did embrace a couple of Apple bonuses like hands-free “Hey Siri” voice instructions, which I’d anticipate the Plus buds to keep up.

Particular launch timing for the Beats Studio Buds Plus couldn’t but be realized. However contemplating that the product particulars are already current inside iOS 16.4, they’ll seemingly be arriving within the not too distant future. The principle query is whether or not (and by how a lot) the “Plus” designation and higher ANC / transparency will drive up the $149.99 worth.

Beats declined remark when reached by The Verge.




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