Sorption of polycyclic aromatic hydrocarbons and trace metals on mineral surfaces Conference Paper uri icon

abstract

  • The aqueous chemistry effects, the relative hydrophobic effects, and the sorbed metal effects on PAH (naphthalene, pyrene, and perylene) sorption to mineral surfaces were studied. Setschenow constant (Ks) values for the individual PAH varied over a wide range depending on the particular salt used. Ks values of naphthalene, pyrene, and perylene were 0.114 (for NaClO4) to 0.667 (for Na2SO4), 0.0612 (for NaClO4) to 0.749 (for Na2SO4), and 0.222 (for KCl) to 1.23 (for K2SO4), respectively. With respect to Na2SO4 and K2SO4 salts, the effect of Na+ > K+ held for naphthalene and pyrene but not for perylene. The effect of Na+ > K+ held for naphthalene and pyrene but not for perylene. The effect of Na+ > K+ might result from the fact that smaller cations had stronger bonds with water, i.e., and thus the salt solutions had less ability to dissolve PAH. Ionic strength variations did not greatly affect pyrene sorption on the individual minerals even though a slight change of Kd was readily apparent. The effect of metal cations on the sorption of PAH might result from a cation- bonding mechanisms whereby a positively-charged metal cation is electrostatically attracted to an electron-rich PAH face.

name of conference

  • ACS National Meeting Book of Abstracts

published proceedings

  • ACS National Meeting Book of Abstracts

author list (cited authors)

  • Yim, S., Schlautman, M. A., Carraway, E. R., & Herbert, B. E.

complete list of authors

  • Yim, S||Schlautman, MA||Carraway, ER||Herbert, BE

publication date

  • December 2000