Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate
Estonian phosphorite ore contains trace amounts of rare earth elements (REEs), many other d-metals, and some radioactive elements. Rare earth elements, Mo, V, etc. might be economically exploitable, while some radioactive and toxic elements should be removed before any other downstream processing fo...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-04-01
|
| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/11/4/388 |
| _version_ | 1797538764272173056 |
|---|---|
| author | Silvester Jürjo Liis Siinor Carolin Siimenson Päärn Paiste Enn Lust |
| author_facet | Silvester Jürjo Liis Siinor Carolin Siimenson Päärn Paiste Enn Lust |
| author_sort | Silvester Jürjo |
| collection | DOAJ |
| description | Estonian phosphorite ore contains trace amounts of rare earth elements (REEs), many other d-metals, and some radioactive elements. Rare earth elements, Mo, V, etc. might be economically exploitable, while some radioactive and toxic elements should be removed before any other downstream processing for environmental and nutritional safety reasons. All untreated hazardous elements remain in landfilled waste in much higher concentration than they occur naturally. To resolve this problem U, Th, and Tl were removed from phosphorite ore at first using liquid extraction. In the next step, REE were isolated from raffinate. Nitrated Aliquat 336 (A336[NO<sub>3</sub>]) and Bis(2-ethylhexyl) Phosphate (D2EHPA) were used in liquid extraction for comparison. An improved method for exclusive separation of radioactive elements and REEs from phosphorite ore in 2-steps has been developed, exploiting liquid extraction at different pH values. |
| first_indexed | 2024-03-10T12:36:03Z |
| format | Article |
| id | doaj.art-b282238a9e5b44629416310940d4a904 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T12:36:03Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-b282238a9e5b44629416310940d4a9042023-11-21T14:16:49ZengMDPI AGMinerals2075-163X2021-04-0111438810.3390/min11040388Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) PhosphateSilvester Jürjo0Liis Siinor1Carolin Siimenson2Päärn Paiste3Enn Lust4Institute of Chemistry, University of Tartu, 50411 Tartu, EstoniaInstitute of Chemistry, University of Tartu, 50411 Tartu, EstoniaInstitute of Chemistry, University of Tartu, 50411 Tartu, EstoniaInstitute of Ecology and Earth Sciences, University of Tartu, 50411 Tartu, EstoniaInstitute of Chemistry, University of Tartu, 50411 Tartu, EstoniaEstonian phosphorite ore contains trace amounts of rare earth elements (REEs), many other d-metals, and some radioactive elements. Rare earth elements, Mo, V, etc. might be economically exploitable, while some radioactive and toxic elements should be removed before any other downstream processing for environmental and nutritional safety reasons. All untreated hazardous elements remain in landfilled waste in much higher concentration than they occur naturally. To resolve this problem U, Th, and Tl were removed from phosphorite ore at first using liquid extraction. In the next step, REE were isolated from raffinate. Nitrated Aliquat 336 (A336[NO<sub>3</sub>]) and Bis(2-ethylhexyl) Phosphate (D2EHPA) were used in liquid extraction for comparison. An improved method for exclusive separation of radioactive elements and REEs from phosphorite ore in 2-steps has been developed, exploiting liquid extraction at different pH values.https://www.mdpi.com/2075-163X/11/4/388rare earth elements for sustainable energeticsionic liquid extractionEstonian phosphorite oretwo-step extraction of rare earth elements |
| spellingShingle | Silvester Jürjo Liis Siinor Carolin Siimenson Päärn Paiste Enn Lust Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate Minerals rare earth elements for sustainable energetics ionic liquid extraction Estonian phosphorite ore two-step extraction of rare earth elements |
| title | Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate |
| title_full | Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate |
| title_fullStr | Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate |
| title_full_unstemmed | Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate |
| title_short | Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate |
| title_sort | two step solvent extraction of radioactive elements and rare earths from estonian phosphorite ore using nitrated aliquat 336 and bis 2 ethylhexyl phosphate |
| topic | rare earth elements for sustainable energetics ionic liquid extraction Estonian phosphorite ore two-step extraction of rare earth elements |
| url | https://www.mdpi.com/2075-163X/11/4/388 |
| work_keys_str_mv | AT silvesterjurjo twostepsolventextractionofradioactiveelementsandrareearthsfromestonianphosphoriteoreusingnitratedaliquat336andbis2ethylhexylphosphate AT liissiinor twostepsolventextractionofradioactiveelementsandrareearthsfromestonianphosphoriteoreusingnitratedaliquat336andbis2ethylhexylphosphate AT carolinsiimenson twostepsolventextractionofradioactiveelementsandrareearthsfromestonianphosphoriteoreusingnitratedaliquat336andbis2ethylhexylphosphate AT paarnpaiste twostepsolventextractionofradioactiveelementsandrareearthsfromestonianphosphoriteoreusingnitratedaliquat336andbis2ethylhexylphosphate AT ennlust twostepsolventextractionofradioactiveelementsandrareearthsfromestonianphosphoriteoreusingnitratedaliquat336andbis2ethylhexylphosphate |