Microscopic Sand, Massive Pollution Solution

Release date: September 10, 2025Guest: Dr. Digambara Patra (American University of Beirut), Nanochemistry & Environmental RemediationEpisode SummaryResearchers are tackling a massive health threat with a microscopic fix. AUB scientist Dr. Digambara Patra explains how silica nanoparticles—essentially “microscopic sand”—can adsorb and help remove persistent polycyclic aromatic hydrocarbons (PAHs) like benzo[ghi]perylene from polluted waters. We unpack why PAHs linger, where they come from (from generators to wildfires), and how a recyclable, cost-effective adsorption approach could scale from lab to real-world treatment.What You’ll LearnWhat PAHs are and why benzo[ghi]perylene is especially concerningHow silica nanoparticles act like “sponges” to pull toxic molecules from waterWhy reversibility and recyclability matter for large-scale cleanupThe global picture: generators in Lebanon, wildfire fallout in North AmericaThe road from proof-of-concept to deployment (engineering and scale-up)