COMPARISON OF NANO-SIZED AMPHIPHILIC POLYURETHANE (APU) PARTICLES WITH SDS, AN ANIONIC SURFACTANT FOR THE SOIL SORPTION AND THE EXTRACTION OF PHENANTHRENE FROM SOIL

摘要

Understanding of surfactant sorption onto soil is needed to assess surfactant mobility in soil and surfactant-facilitated transport of hydrophobic pollutants in soil/aqueous systems. Micelle-like amphiphilic nano-sized polyurethane (APU) particles synthesized from amphiphilic urethane acrylate anionomers could solubilize a model hydrophobic pollutant, phenanthrene within their hydrophobic interiors. Batch experiments were conducted with soil slurries to compare APU Sodium Dodecyl Sulfate (SDS), anionic surfactant for the sorption onto soil. APU particles (K_(surf) = 0.2 mL/g) were weakly adsorbed onto the sandy soil compared to SDS (K_(surf) = 1.3 mL/g), due to their chemically crosslinked structure. Compared with SDS, APU particles exhibited the higher extraction efficiency to remove phenanthrene from the contaminated sandy soil.