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 Publicado: Lun Feb 14, 2022 6:24 am Título del mensaje: Electric shock salvage precious metal from waste. |
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As chemists struggle to figure out how to retrieve precious metals from industrial waste and discarded electronics. One team has found a solution that sounds a bit like magic: slamming a trash can with hot flashes of electricity.Rare earth elements (REEs) present an environmental paradox. On the one hand, dozens of these metals, such as yttrium and neodymium, are known to exist.
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It is a key component of wind turbines and solar panels, and low-cost REE sources can provide these environmentally friendly technologies with substantial support. In turn, REE mining causes billions of dollars in environmental damage in each year due to various components occur in low concentrations Mining companies have to chew up large amounts of ore, strip it, and mine the terrain.
In addition, REEs are often mixed with radioactive elements. and extraction produces low levels of nuclear waste.on the contrary Old electronic equipment and other industrial waste is rich in REE, but existing recycling methods are inefficient and expensive. and requires the use of corrosive chemicals such as concentrated hydrochloric acid. For every environmental problem that REE can solve They seem to suggest two more problems.
A new process could help break that record. Today in Science Advances, a team led by James Tour of Rice University, an organic chemist, reports that it uses electrical heat waves to make it easier to separate REEs from industrial waste. This technique is twice as effective as current methods and uses much more harmless chemicals.It's a very interesting approach," said Amir Sheikhi, a chemical engineer at Pennsylvania State University Park, who studies REE extraction. “By treating it at a high temperature for a short period of time… these rare earth elements were released. |
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