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Biodegradation of Polycyclic Aromatic Hydrocarbons in Oil-Contaminated Beach Sediments Treated with Nutrient Amendments

Department of Chemical and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260

View larger version (25K): [in a new window]   Fig. 1. Approximation of actual polycyclic aromatic hydrocarbon (PAH) loss (symbols) and first-order loss kinetics (lines) for total target PAHs (i.e., two- to six-ring PAHs and C1 to C4 alkyl homologs of two- and three-ring PAHs).

View larger version (27K): [in a new window]   Fig. 2. Degradation of total target two-ring polycyclic aromatic hydrocarbons (PAHs) (i.e., naphthalene and its C1 to C4 alkyl homologs) relative to hopane for the different treatments over time.

View larger version (26K): [in a new window]   Fig. 3. Degradation of total target three-ring polycyclic aromatic hydrocarbons (PAHs) and their C1 to C4 alkyl homologs relative to hopane for the different treatments over time.

View larger version (23K): [in a new window]   Fig. 4. Degradation of total target four-ring polycyclic aromatic hydrocarbons (PAHs) relative to hopane for the different treatments over time.

View larger version (24K): [in a new window]   Fig. 5. Degradation of total target five-ring polycyclic aromatic hydrocarbons (PAHs) relative to hopane for the different treatments over time.

View larger version (23K): [in a new window]   Fig. 6. Degradation of total target six-ring polycyclic aromatic hydrocarbons (PAHs) relative to hopane for the different treatments over time.