TABLE 2.

Degradation of aromatic hydrocarbons in crude oil attached to grains of gravel placed in the beach-simulating tanks

Oil componentResidual amt (SE) (%)a
Control tankFertilizer-containing tank
Day 14Day 28Day 56Day 14Day 28Day 56
n-Alkane92.8 (2.0)74.9 (14.3)26.7 (9.7)61.9 (12.4)22.3 (12.0)2.1 (0.0)
C1-naphthalene25.9 (21.0)12.4 (10.7)0.0 (0.0)14.4 (17.7)0.0 (0.0)0.0 (0.0)
C2-naphthalene38.8 (23.9)28.7 (19.3)7.6 (6.2)23.4 (20.8)0.7 (0.8)0.0 (0.0)
C3-naphthalene56.5 (27.6)46.3 (26.2)24.9 (15.9)46.5 (26.3)4.9 (4.7)0.0 (0.0)
C4-naphthalene70.7 (18.5)63.9 (30.8)48.9 (23.0)66.9 (22.5)25.8 (11.4)0.6 (0.4)
C0-dibenzothiophene50.1 (26.7)37.3 (21.0)13.7 (7.5)32.3 (19.1)3.6 (4.4)0.1 (0.2)
C1-dibenzothiophene70.0 (22.1)56.4 (27.4)42.1 (20.5)57.9 (19.9)19.0 (9.6)0.4 (0.3)
C2-dibenzothiophene93.4 (6.2)81.1 (18.5)71.8 (17.3)85.1 (10.8)50.4 (9.4)9.5 (2.4)
C3-dibenzothiophene96.5 (4.4)93.1 (8.3)87.5 (8.9)92.9 (0.6)73.7 (4.5)23.7 (5.1)
C4-dibenzothiophene98.4 (2.1)95.3 (2.8)84.9 (2.7)96.3 (2.7)87.1 (1.3)39.3 (8.1)
C0-phenanthrene42.7 (23.8)28.0 (17.9)8.7 (10.7)24.6 (16.5)2.6 (3.2)0.0 (0.0)
C1-phenanthrene65.4 (26.5)51.0 (25.9)35.6 (18.3)53.9 (22.2)16.8 (9.8)0.0 (0.0)
C2-phenanthrene85.6 (6.1)72.3 (18.0)62.0 (16.8)76.9 (8.0)43.7 (8.0)6.5 (0.7)
C3-phenanthrene91.5 (3.6)89.2 (10.7)78.0 (8.5)113.1 (27.1)76.8 (13.1)19.1 (3.4)
C4-phenanthrene110.1 (0.8)95.8 (1.5)98.7 (6.6)100.5 (8.8)87.5 (4.3)37.2 (12.9)
C5-phenanthrene106.9 (0.5)96.3 (0.6)97.0 (6.5)98.3 (7.5)87.8 (7.1)41.9 (6.2)
C6-phenanthrene104.9 (2.9)102.6 (2.3)98.7 (3.2)101.4 (5.6)94.0 (2.3)57.4 (7.9)
C7-phenanthrene107.7 (8.6)108.4 (4.5)103.4 (3.9)111.2 (5.5)104.7 (3.8)79.8 (9.0)
C0-fluorene40.9 (27.0)37.0 (22.8)5.1 (6.2)17.6 (21.6)0.0 (0.0)0.0 (0.0)
C1-fluorene69.1 (16.0)49.6 (24.1)33.8 (20.9)59.4 (12.9)6.4 (7.8)0.0 (0.0)
C2-fluorene94.3 (16.2)81.2 (29.6)74.0 (32.1)77.1 (11.1)34.1 (8.7)1.6 (2.0)
  • a The initial concentration of each component at zero time was defined as 100%.