(The role of natural organic matter in the partitioning and transport of polynuclear aromatic hydrocarbons in groundwater)
A general summary of our progress associated with batch and column experiments is included in this report. During the period of July 1, 1989 through the present, we have emphasized batch experiments to study the partitioning between one PAH, phenanthrene, and each of two sources of groundwater natural organic matter (NOM) in the presence and absence of a model mineral surface (a-Al{sub 2}O{sub 3}). The behavior of a soil-derived fulvic acid sorbed to the mineral surface has also been investigated. The NOM sources were used as bulk'' (unfractionated) and fractionated into different molecular weight (MW) fractions by ultrafiltration (UF), and into humic and non-humic fractions by XAD-8 resin adsorption. Three techniques have been evaluated for differentiating between aqueous PAH and NOM-bound PAH: fluorescence quenching (FQ), reverse phase (Sep-Pak) separations, and dialysis bags. We have conducted batch experiments to study the three binary systems; PAH-NOM, PAH-a-Al{sub 2}O{sub 3}, and NOM-a-Al{sub 2}O{sub 3}; and the ternary system, PAH-NOM-a-Al{sub 2}O{sub 3}. Sorption of NOM onto a mineral surface, alumina, has been evaluated from the perspective of providing a model of soil organic matter.
- Research Organization:
- Colorado Univ., Boulder, CO (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- FG02-89ER60850
- OSTI ID:
- 6535735
- Report Number(s):
- DOE/ER/60850-1; ON: DE91000826; TRN: 90-033729
- Country of Publication:
- United States
- Language:
- English
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