Fluxnium Advances Polymer Fiber Technology to Extract Uranium from Seawater

Innovative Uranium Recovery from Seawater

According to НВ — Техно: Fluxnium, an emerging startup, is pioneering a method to extract uranium directly from seawater using specialized polymer fibers. With more than 4 billion tons of uranium dissolved in the oceans, this technique holds immense promise for fulfilling the growing demands of nuclear power generation worldwide. The process relies on polymer fibers with a large surface area that adsorb uranium and can be reused multiple times. To support this groundbreaking work, Fluxnium has secured around $7 million in seed funding.

The uranium adsorption occurs as polymer fibers, woven into long strands, are submerged in the ocean for 30 to 60 days. After retrieval, the uranium is processed into a concentrate known as "yellowcake," which is then returned to the water. The sorbent chemistry is licensed from U.S. Department of Energy national labs, specifically the Oak Ridge National Laboratory (ORNL) and Pacific Northwest National Laboratory (PNNL). These facilities have tested fibers containing amidoxime groups that bind uranium effectively. Research indicates that this material can accumulate up to 5.2 grams of uranium per kilogram of sorbent after 49 days in seawater.

Costs and Uranium Demand Outlook

Despite the significant potential, extracting uranium from seawater currently remains more costly than traditional land-based mining. Estimates place the expense between $610 and $830 per kilogram of uranium, while terrestrial uranium reserves exceed 8.1 million tons with extraction costs up to $260 per kilogram. The main cost drivers include the sorbent material itself, installation, retrieval, and redeployment of the fibers. After four reuse cycles, the amidoxime sorbent retains approximately 28% of its original uranium uptake capacity, although biofouling reduces efficiency to about 30% after 42 days.

As of January 1, 2025, there are 418 commercial nuclear reactors in operation worldwide, collectively consuming roughly 64,500 tons of uranium annually. Projections suggest this demand will rise sharply to between 84,800 and 143,900 tons per year by 2050.

"If demand continues to grow as forecasted, we will face a structural uranium shortage," said Jeff Green.

Gary Hill emphasized the significance of Fluxnium's innovation, stating, "This milestone demonstrates that harvesting nuclear fuel from the ocean could ultimately become commercially viable." The ocean’s uranium resources could theoretically supply energy needs for 31,000 to 53,000 years, highlighting its potential as a vital long-term source.

Fluxnium’s seawater uranium extraction technology represents a crucial advancement in addressing the escalating need for nuclear fuel amid limited terrestrial reserves. Although current costs remain high, tapping into the vast uranium deposits in oceans could provide a steady, sustainable energy source for future generations. Continued refinement of this technology may reduce reliance on conventional mining and contribute to improved environmental outcomes.

As the demand for sustainable energy solutions grows, methods like uranium extraction from seawater are becoming increasingly relevant. Similarly, advancements in technology are also being made in the field of water purification. For instance, an innovative solar-powered desalination system has been developed to convert seawater without generating harmful brine waste, showcasing the potential of integrating eco-friendly practices across different sectors.