PHENANTHRENE REMOVAL FROM SOIL SLURRIES WITH SURFACTANT-TREATED OXIDES

A soil-slurry washing technique to decontaminate soils containing low- solubility nonionic organic pollutants was investigated, using phenant hrene as a model pollutant. The technique is based on first transferri ng the sorbed phenanthrene from the soil to anionic surfactant-coated oxide particles, and then separating these anionic surfactant-coated o xide particles with the sorbed phenanthrene from the soil slurry via a . magnetic separation technique. The decontamination of two soils with different particle sizes and soil organic matter content was investig ated. The proposed soil-slurry washing technique was effective in remo ving a strongly sorbing nonionic organic contaminant from soil slurrie s. Various operational scenarios of multistage soil-slurry reactors we re evaluated with a mathematical model.