BRIN-Led Review Finds Monazite Rare Earth Recovery Can Approach 100%-But Scale-Up and Radioactivity Remain the Test

Highlights

• A BRIN-led review of 2010–2026 research found monazite rare earth extraction ranges from below 30% in non-optimized conditions to nearly 100% under optimized processing.
• Monazite's radioactive thorium and uranium content poses significant containment and regulatory challenges that lab extraction rates do not capture.
• The review warns that high extraction percentages do not equal commercial success—reagent costs, water use, product purity, and individual Nd/Pr recovery all matter.
• Neither sulfuric-acid nor alkaline processing is inherently sustainable; full flowsheet design including waste and radionuclide management determines viability.
• Authors call for standardized testing measuring individual rare earth recovery, reagent consumption, and thorium/uranium behavior rather than peak extraction alone.