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I have found previously that a Photochemical reaction can be...

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    I have found previously that a Photochemical reaction can be produced using lasers to help with Chemical leaching technologies, but perhaps this article is suggesting that they only need lasers for the separation now? if they can separate out the REE from coal ashes then perhaps it would follow that they can also separate out the REE from mined soil? that's if they can get it to work large scale? that would be an absolute godsend because Chemical leaching of REE is a pretty dirty business, if they could do away with the leaching, then this laser system may be a world beater.


    https://www.researchgate.net/public...th_elements_from_coal_power_plant_by-products
    Discovering the feasibility of using the radiation forces for recovering rare earth elements from coal power plant by-products
    Article (PDF Available) in Advanced Powder Technology 26(5) · August 2015
    1. Conclusions
    We have conducted a numerical study to explore the feasibility of laser separation for recovery of rare earth elements from coal ashes.
    The calculations were performed for some rare earth oxides and mineral oxides that are commonly found in coal ashes.
    The results indicate that, under laser action, these oxide particles were moving along with the laser propagation direction and finally dropped out of the laser beam into two small areas that were
    several millimeters apart.
    The rare earth oxides were seen to concentrate in the area near the beam waist while the mineral
    oxi-des mainly concentrated in the area further away from the beam waist.
    This suggests a new potential separation method that rare earth elements in coal ashes can be separated and recovered without the need of using leaching acids and other toxic separation solvents.
    The present study, however, is preliminary. Similar results were previously reported by others [16,46–48]. Continuing studies which investigate into the effect of the various laser parameters
    such as beam shape, beam diameter and focal length on the separation throughput together with experimental observations are being conducted.
    The results will be reported in due course.
 
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