In this study we further explore the APU-enhanced remediation of PAH-contaminated soil by synthesizing particles with alternative formulations and differing synthesis methods. The resulting APU particles possess different structures and properties. Each formulation was character- ized and tested for its affinity for PHEN and for its binding with an aquifer material. The stability of APU particles in model groundwater solutions containing a divalent cation and particle mobility in columns of aquifer material were also tested. The results of this study reveal the effects of different precursor chain structures on the properties of APU particles and their efficacy with regard to remediation of sorbed PAHs.
Experimental Methods
Materials. A sandy aquifer material was used in this study as a representative porous medium and was obtained from a quarry in Newfield, NY. The organic and inorganic carbon contents of the aquifer material were determined to be 0.57% and 1.43%, respectively, using the thermal conductivity method (total carbon) and the pressure-calcimeter method