By Penny Langford
The narrative of "scarcity" in the critical minerals sector is undergoing a massive structural shift. For decades, the mining industry viewed tailings: the waste material left over after traditional processing: as a liability and an environmental headache. But as we move through mid-2026, those legacy waste piles have become the industry's most valuable "secondary mines."
With the Department of the Interior’s Secretarial Order No. 3436 accelerating domestic mineral recovery and a surge in mining investment valuation metrics shifting toward ESG-positive assets, waste recovery is no longer a niche experiment. It is a supply chain necessity.
In this week's Power List, we highlight five projects and technologies that are turning historic trash into the critical treasure required for the energy transition and national security.
1. Metals One: The Colorado Uranium Reclamation
Metals One has emerged as a frontrunner in the U.S. uranium sector, but not through traditional drilling alone. By focusing on the prolific Uravan Mineral Belt in Colorado, the company is targeting abandoned mine waste dumps that have sat idle for decades.
The real game-changer here is their partnership with DISA Technologies. Using patented High-Pressure Slurry Ablation (HPSA) technology, the project can separate uranium and vanadium from waste material without the massive capital expenditure of a new mill. In late 2025, assay results from these waste piles showed grades as high as 41,768 ppm uranium: levels that would make a conventional hard-rock miner green with envy.
For investors, the utility is clear: Metals One receives a gross revenue share from the recovered concentrates while DISA handles the operations. It’s a zero-Capex, zero-Opex model that is cleaning up Colorado while padding the domestic uranium supply roadmap.
2. Rio Tinto’s Nuton: The Bioleaching Breakthrough
Copper remains the backbone of the electrification movement, but high-grade deposits are increasingly rare. Enter Nuton, a Rio Tinto venture that is proving that biology can do what chemistry cannot.
At the Johnson Camp Mine in Arizona, Nuton’s nature-based bioleaching technology uses microorganisms to "eat" the waste, extracting copper from primary sulfides that were previously considered unrecoverable. As of May 2026, the project is on track to produce 30,000 tonnes of refined copper over its demonstration period.
The environmental data is particularly compelling for 2026 mandates: Nuton’s process uses 80% less water and produces 60% fewer carbon emissions than traditional smelting. In an era where "green copper" commands a premium, Nuton is effectively lowering the industry's carbon floor.
3. Phoenix Tailings: The First Standalone REE Refinery
Rare Earth Elements (REEs) are the Achilles' heel of the Western supply chain. Phoenix Tailings, a Massachusetts-based firm founded by MIT alumni, is attacking this problem by treating mining waste as a feedstock for a new kind of refinery.
Operating out of their Exeter facility, the company uses a proprietary electrochemical system to collect pure metals: like Neodymium-Praseodymium (NdPr) and Dysprosium: directly onto electrodes. Because the process avoids the acid-heavy chemistry of traditional refining, it can be situated closer to population centers and existing infrastructure.
With a recent $40.2 million funding round and active ARPA-E grants, Phoenix Tailings is proving that a circular REE supply chain is not just possible: it’s profitable. They are currently expanding their catalog to include Terbium and Yttrium, all sourced from domestic industrial byproducts.
4. Energy Fuels: The Strategic Multicommodity Hub
While many projects focus on a single mineral, Energy Fuels’ White Mesa Mill in Utah has become a poly-metallic powerhouse. It remains the only facility in the U.S. licensed to process monazite sands: a byproduct of heavy mineral sands mining: into separated rare earth oxides.
In March 2026, the mill achieved a major milestone: the first primary production of terbium oxide in the U.S. in decades. Combined with their uranium throughput: which hit 1 million pounds of U3O8 in April 2026: White Mesa is a textbook example of how existing infrastructure can be repurposed for the 2026 critical minerals crunch.
The mill's ability to share fixed operating costs across uranium, vanadium, and REEs makes it one of the most resilient assets in the domestic market.
5. Jetti Resources: The Catalyst King
Jetti Resources isn't building new mines; it's making old ones better. Their catalytic technology allows for the heap leaching of low-grade primary sulfide ores, such as chalcopyrite, which typically resists traditional leaching methods.
At sites like the Pinto Valley Copper Mine in Arizona, Jetti’s tech has been shown to double cathode production per irrigated area. By applying this catalyst to existing waste heaps, mining majors like BHP and Freeport are able to extract millions of pounds of copper that were essentially "written off" as waste.
In May 2026, Jetti’s influence is felt globally, as more operators integrate their catalysts into legacy tailings to offset the lithium and base metal price volatility seen earlier this year.
2026 Waste Recovery Snapshot: Data & Potential
The following table outlines the resource potential and technological impact of the secondary recovery market as of Q2 2026.
| Project / Company | Primary Mineral | Key Technology | 2026 Operational Status |
|---|---|---|---|
| Metals One | Uranium/Vanadium | High-Pressure Slurry Ablation | Full-scale remediation rollout |
| Nuton (Rio Tinto) | Copper | Bioleaching | Commercial production in Arizona |
| Phoenix Tailings | REEs (NdPr, Dy) | Electrochemical Refining | Active domestic REE refinery |
| Energy Fuels | Uranium / Terbium | Monazite Processing | Commercial separation capacity |
| Jetti Resources | Copper | Catalytic Leaching | Global deployment across majors |
The 2026 Outlook: Resilience Through Recovery
The common thread among these projects is speed to market. Traditional greenfield mining projects often face decade-long permitting battles. Waste recovery projects, conversely, typically benefit from existing permits and a much lower environmental footprint, allowing them to come online in 12–24 months rather than 12–24 years.
For operators, the utility is in the margin. For investors, the appeal is in the ESG-aligned "green" premium. And for the global supply chain, these projects represent the ultimate insurance policy: a way to ensure that the minerals needed for the future aren't buried in the waste of the past.
Shareable Social Snippet:
Mining's "trash" is officially the 2026 treasure. From Metals One's uranium cleanup in Colorado to Nuton's copper bioleaching, waste recovery is redefining the domestic supply chain. These 5 projects are proving that the fastest way to hit our critical mineral targets is by looking at what we've already dug up. #CriticalMinerals #MiningInnovation #Uranium2026 #SkillingsMining
