Functionalized Attapulgite Adsorbent for Cost-Efficient PFAS Removal

The patent uses composite materials by combining attapulgite (a clay mineral) with quaternary amine functional groups and mercapto groups to create a hybrid adsorbent that leverages the structural benefits of natural clay with the enhanced chemical affinity of synthesized functional groups, achieving superior PFAS removal compared to single-material solutions

The patent modifies the surface chemical parameters of attapulgite by introducing quaternary amine and mercapto functional groups through chemical treatment, transforming the physical adsorption mechanism into a chemically-enhanced adsorption process that significantly improves PFAS removal efficiency while maintaining cost-effectiveness

The patent employs a low-cost attapulgite-based adsorbent that can be easily manufactured and potentially disposed of or regenerated after use, replacing expensive anion exchange resins with a more economical material solution that achieves comparable or superior performance without requiring costly equipment infrastructure

The patent changes the chemical surface parameters of attapulgite by functionalizing it with quaternary amine and mercapto groups, transforming it from a simple clay mineral into a high-performance adsorbent that can compete with expensive specialized resins while maintaining low material and equipment costs

The patent replaces the mechanical high-pressure membrane separation system with a chemical adsorption system based on functionalized attapulgite, substituting complex mechanical infrastructure with a simpler chemical process that achieves high PFAS removal efficiency without requiring expensive high-pressure equipment

The patent modifies the surface chemical properties of attapulgite through functional group introduction, creating an adsorbent with high affinity for PFAS that enables efficient removal through simple contact processes, eliminating the need for complex high-pressure membrane systems