Table 4.
Feasibility Analysis of Critical Metals and Saline Water Sources (Produced Water (PW); Geothermal Aquifer (GA); Seawater Brine (SB); and Acid Mine Drainage (AMD).
| Metal | Criticality Index (C) | Feasibility Score | Source(s) | |
|---|---|---|---|---|
| Global Demand % | USA Demand % | |||
| REEs | ||||
| Dysprosium | 0.42 | 15 | NA | AMD |
| Gadolinium | 0.42 | 4 | NA | AMD |
| Holmium | 0.42 | 41 | NA | AMD |
| Lutetium | 0.42 | 17 | NA | AMD |
| Neodymium | 0.42 | 5 | NA | AMD |
| Samarium | 0.42 | 1 | NA | AMD |
| Scandium | 0.42 | 18 | NA | AMD |
| Terbium | 0.42 | 30 | NA | AMD |
| Thulium | 0.42 | 3 | NA | AMD |
| Ytterbium | 0.42 | 22 | NA | AMD |
| Yttrium | 0.42 | 0.7 | 19.7 | AMD |
| Other Critical Metals | ||||
| Arsenic | 0.53 | 5 | 9 | PW, GA |
| Lithium | 0.53 | 59 | 1880 | PW, GA, SB |
| Magnesium | 0.16 | 721 | 15600 | PW, SB |
| Strontium | 0.68 | 186 | 1760 | PW, SB, GA |