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Acid Mine Drainage - OSTI GOV

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Last Updated: 15 November 2022

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Critical review of functionalized silica sorbent strategies for selective extraction of rare earth elements from acid mine drainage

Both solvent extraction methods for REE recovery from liquid waste sources are expected to be competitive with solvent extraction's due to their anticipated lower environmental impact and simpler process operations. Functionalized silica is a rapidly growing category of low cost, stable sorbents for heavy metal and REE recovery. This insightful review debuts the increasing interest in functionalized silica sorbents among rare earth element recovery papers indexed in Web of science, highlighting shifts in REE restoration research focus and confirming the growing interest in functionalized silica sorbents. We'd be aware of the need to remove competing fouling metals from purified REE u201cbaskets from purified REE extraction that could be tailored to various water systems.

Source link: https://www.osti.gov/biblio/1868079


Systems and processes for recovery of high-grade rare earth concentrate from acid mine drainage

In one sense, the disclosure relates to a continuing process for treating acid mine drainage while still recovering a high-grade rare earth preconcentrate suitable for extraction of commercially valuable rare earth oxides. The information is related to a process for processing the preconcentrate into a pregnant leach solution that does not form gels or emulsions and is suitable for processing by solvent extraction. The disclosure relates to a composition that contains rare earth elements that were not part of the procedure described herein. In yet another sense, the disclosure pertains to a composition that contains rare earth elements created by the process.

Source link: https://www.osti.gov/biblio/1805653


Bioreactor for acid mine drainage control

A bioreactor for reacting a sulfate-reducing bacteria-based mine drainage system in aqueous heavy metal and sulfate solution can produce heavy metal sulfides and reduce the solution's sulfuric acid content. The inlet section and reaction section of an inlet manifold nearby the inlet section pumps aqueous mine drainage solution into the inlet section for flow through the inlet section and reaction section. In the solution to produce solid metal sulfides, a sulfate reduction bacteria and bacteria nutrient composition in the inlet section of a sulfate reducing bacteria and bacteria is present in the form of solid metal sulfides.

Source link: https://www.osti.gov/biblio/874144

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions