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source:natureAbstractIn this study, calcium carbonate, sepiolite, and commonly used diatomite (DE) carriers were mixed to prepare calcium carbonate or sepiolite mixed DE/nano-titanium dioxide (TiO2). The analyses of X-ray diffraction and scanning electron microscope confirmed that the particle size of nano-TiO2 was about 20–24 nm in DE/nano-TiO2, and the particles were relatively uniform. When (calcium carbonate and sepiolite + DE)/nano-TiO2 was used, the Ti content in the composite remained unchanged, while the particle size of nano-TiO2 increased to a certain extent. Among them, the use of (...
Release time: 2022 - 11 - 25
source:innovationnewsnetworkCritical minerals, including rare earth elements, are essential to the US’ economy and national security as they are used in a variety of everyday applications. Due to their necessity, researchers are looking for new ways to extract these metals to ensure that supply is guaranteed. Now, researchers from Penn State’s Center for Critical Minerals have developed a new purification process that extracts rare earth oxides from acid mine drainage and associated sludges at purities of 88.5%The findings, titled ‘Selective recovery of high-grade rare earth, Al, and Co-Mn fro...
Release time: 2022 - 11 - 24
source:natureYour smartphone begins life neatly packed into a well-designed box. Chances are it will end its days in a more ignominious manner.Assuming it doesn’t end up rattling around in a junk drawer, it will most likely go to the same landfill as your other household waste, where it will slowly leach toxic chemicals into the soil and water. Or worse, it might be shipped to another country, where low-income workers will manually break the phone apart to recover anything of value and burn or bury the rest, putting their health — and that of their wider community — at risk in the process. Mea...
Release time: 2022 - 11 - 23
source:freethinkBy figuring out how to manufacture in the lab a rare mineral, previously found only in meteorites, two teams of researchers may have just helped secure America’s clean energy future. Permanent magnets: Of the 118 elements on the periodic table, 17 fall into the category of “rare earths,” and contrary to their name, these materials aren’t terribly rare — each is more common than gold, and one is more plentiful than even copper.Rare earth elements are used to make a slew of products, from smartphone screens to x-ray machines, but permanent magnets are arguably the most impor...
Release time: 2022 - 11 - 22
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