Accession Number : ADA302775

Title :   Water Washing of Polycylic Aromatic Hydrocarbons from Soils.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Thorson, Paula A.

PDF Url : ADA302775

Report Date : AUG 1995

Pagination or Media Count : 96

Abstract : Dissolution studies were carried out using batch operations with soils that were prepared in the laboratory. The soil used was Jordan sand (fraction organic carbon (foc) <0.0001). The sand was coated with varying concentrations of phenanthrene and pyrene, both of which are polycyclic aromatic hydrocarbons (PAHs). Hexane was used to dissolve the chemical and then coat the sand. Double distilled water with a pH of about 5 was used to wash the various coated sands over a series of days. They were given four days to equilibrate before the water was analyzed and replaced with new water. It was found that lower solubilities were obtained for phenanthrene at lower soil concentrations. Strong linear correlations were observed over short ranges of about 0.1 mg/g or less. However there was evidence that a nonlinear function would be necessary to describe this relationship over a broad range of soil concentrations (about 0 to 0.4 mg/g) due to decreasing slopes with increasing soil concentrations.

Descriptors :   *WATER, *SOILS, *AROMATIC HYDROCARBONS, *POLYCYCLIC COMPOUNDS, LINEAR SYSTEMS, FUNCTIONS, THESES, SAND, COATINGS, CONCENTRATION(COMPOSITION), NONLINEAR ANALYSIS, CORRELATION TECHNIQUES, BATCH PROCESSING, PH FACTOR, HEXANES, DISTILLED WATER, PHENANTHRENES.

Subject Categories : Polymer Chemistry
      Soil Mechanics
      Organic Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE