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Combined Effect of Natural Organic Matter and Surfactants on the Apparent Solubility of Polycyclic Aromatic Hydrocarbons

National Subsurface Environmental Research Laboratory (NSERL), Ewha Womans Univ., 11-1 Daehyon-dong, Seodaemun-gu, Seoul 120-750, South Korea

View larger version (18K): [in a new window]   Fig. 1. High performance liquid chromatography (HPLC) chromatograms of naphthalene (10 mg/L), surfactants (10 mg/L), and natural organic matter (NOM, 10 mg/L) at 254 nm. (a) Naphthalene in water, (b) naphthalene in sodium dodecyl sulfate (SDS) and NOM solution, and (c) naphthalene in Triton X-100 and NOM solution.

View larger version (40K): [in a new window]   Fig. 2. Polycyclic aromatic hydrocarbon (PAH) solubility in sodium dodecyl sulfate (SDS, 10 mg/L) and Suwannee River natural organic matter (NOM, 10 mg/L) solution; C is the increased solubility in SDS and NOM solution and C0 is the solubility in water.

View larger version (44K): [in a new window]   Fig. 3. Polycyclic aromatic hydrocarbon (PAH) solubility in Triton X-100 (10 mg/L) and Suwannee River natural organic matter (NOM, 10 mg/L) solution.

View larger version (35K): [in a new window]   Fig. 4. Pyrene solubility in Suwannee River natural organic matter (NOM) and sodium dodecyl sulfate (SDS) solution at various NOM and SDS concentrations.

View larger version (40K): [in a new window]   Fig. 5. Polycyclic aromatic hydrocarbon (PAH) solubility in sodium dodecyl sulfate (SDS, 10 mg/L) and Suwannee River natural organic matter (NOM, 10 mg/L) solution with NaCl (3.47 x 10-5 M).

View larger version (39K): [in a new window]   Fig. 6. Polycyclic aromatic hydrocarbon (PAH) solubility in sodium dodecyl sulfate (SDS, 10 mg/L) and Suwannee River natural organic matter (NOM, 10 mg/L) solution with CaCl2 (3.47 x 10-5 M).

View larger version (29K): [in a new window]   Fig. 7. Differences in polycyclic aromatic hydrocarbon (PAH) solubility in sodium dodecyl sulfate (SDS, 10 mg/L) and natural organic matter (NOM, 10 mg/L) solution when SDS is added simultaneosly with the NOM and subsequent to the NOM.