Birmingham University's freeze-drying technique slashes cost of lead-removing water filter

University of Birmingham researchers created a method to produce a water treatment material at 74% lower energy cost and 3x higher yield than traditional processes, potentially expanding access to cle

University of Birmingham researchers developed a freeze-drying technique for copper imidazolate metal-organic framework (MOF) BNMG-1. This method achieves at least three times higher yield and reduces estimated electricity demand by 74% per gram compared to conventional processing. Lab-scale production costs dropped from $19/g to $5/g using the technique. The material removes ≥90% lead from solution within the first hour of treatment and maintains structural integrity after seven days in air, freshwater, and artificial seawater. Published in *Green Chemistry* (2026), the research was validated with industrial wastewater samples and protected via patent application. The material’s focus on lead capture in chemically complex solutions suggests it addresses a critical pathway for water decontamination in polluted regions.

This innovation moves water access by making lead removal significantly cheaper at scale. For communities where lead pollution threatens safe drinking water, the cost reduction could enable more widespread use of this technology in resource-limited settings. However, real-world industrial implementation requires partner collaboration and remains confined to lab-scale metrics. The next step involves scaling the process with water treatment partners to confirm performance in diverse environmental conditions. The study’s narrow focus on lead in complex solutions means broader contaminant removal may require additional development.

Source: Phys.org