Smart Cotton Fabric Wipes Out Toxic Dyes from Wastewater

Human activities, particularly the release of synthetic dyes, contribute significantly to water pollution. To combat this, scientists have developed an innovative solution: a simple cotton fabric transformed into a powerful, eco-friendly filter.

The fabric is first coated with chitosan, a natural substance, to enhance its surface properties. It is then infused with silver nanoparticles, creating what is known as a heterogeneous nano-catalyst – a solid material that speeds up chemical reactions without being consumed. When tested on water contaminated with Congo red, a model dye pollutant, this smart fabric demonstrated impressive performance, successfully breaking down approximately 90% of the toxic dye within just 20 minutes.

Furthermore, the material proves to be robust. It was reused for three cycles and still maintained about 77% of its initial efficiency, signalling its strong potential for developing sustainable wastewater treatment technologies.