Abstract
Lithium-aluminum-layered double hydroxide chloride (Li-Al LDH) has been investigated in recent years for application in direct lithium extraction from a variety of sources, including geothermal brines and other terrestrial bodies of clays and produced water. Previous structural research by our group has elucidated the underlying structure and properties of the Li-Al LDH structure in both pure and iron-doped LDH sorbents that allows for highly selective lithium extraction with an efficiency of >91% from geothermal brines with a wide variety of competing ions such as sodium and potassium. Here, we expand on previous neutron analysis by utilizing a dynamic neutron method, quasi-elastic neutron scattering (QENS). This method allows for the determination of water movement at different temperatures within the layered double hydroxide to understand the dynamic structural operation of Li-Al LDHs during use. The work below further clarifies the specific mechanisms that lithium ions follow with water in the LDH layers for selective extraction over other competing ions.
| Original language | English |
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| Title of host publication | IMPC 2024 - 31st IMPC-International Mineral Processing Congress |
| Publisher | Society for Mining, Metallurgy and Exploration |
| Pages | 3343-3351 |
| Number of pages | 9 |
| ISBN (Electronic) | 9780873355186 |
| State | Published - 2024 |
| Event | 31st IMPC-International Mineral Processing Congress, IMPC 2024 - Washington, United States Duration: Sep 29 2024 → Oct 3 2024 |
Publication series
| Name | IMPC 2024 - 31st IMPC-International Mineral Processing Congress |
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Conference
| Conference | 31st IMPC-International Mineral Processing Congress, IMPC 2024 |
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| Country/Territory | United States |
| City | Washington |
| Period | 09/29/24 → 10/3/24 |
Funding
This work was supported by the Critical Materials Innovation Hub funded by the U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy (EERE), Advanced Materials and Manufacturing Technologies Office (AMMTO). Neutron scattering studies was supported by Technology Commercialization Funds, U.S. DOE, Office of EERE, Geothermal Technologies Office (GTO). M.P.P. was supported by Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division. Neutron scattering experiment was performed at ORNL’s Spallation Neutron Source, supported by the Scientific User Facilities Division, Office of Basic Energy Sciences, US DOE. S.F.E. is grateful for a fellowship from the Bredesen Center for Interdisciplinary Graduate Education. This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/ doe-public-access-plan).
Keywords
- Li-Al LDH sorbents
- QENS studies
- direct lithium extraction
- water dynamics