For decades, water utilities have relied on giant tanks filled with ion-exchange resin beads to remove perchlorate, a harmful industrial pollutant, from drinking water. The system works by attracting negatively charged perchlorate ions to positively charged resin beads, allowing purified water t...

Source: [Phys.org](https://phys.org/news/2026-07-ruthenium-nanoparticles-captured-perchlorate-harmless.html)

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