Evidence of pore effects influencing slow aqueous desorption of phenanthrene from three silica particles of varying particle size and mean pore diameters was investigated. A resistant fraction amounting to 64% of the initial phenanthrene content was observed for 21A particles. This result suggests that pore effects are a major contributor to the observance of a phenanthrene resistant fraction in one model silical used in this study. This also suggests that micropores can contribute to slow aqueous desorption of organic compounds of low aqueous solubility from naturally aged soils and sediments.
Revised: October 12, 2001 |
Published: October 1, 2001
Citation
Riley R.G., C.J. Thompson, M.H. Huesemann, Z. Wang, B.M. Peyton, T.J. Fortman, and M.J. Truex, et al. 2001.Artificial Aging of Phenanthrene in Porous Silicas Using Supercritical Carbon Dioxide.Environmental Science & Technology 35, no. 18:3707-3712.PNNL-SA-34512.