Table 2.
Analysis of BTEX and PAHs content by GC‐MS in environmental samples
| Benzene | Toluene | Ethylbenzene | m‐, p‐xylene | o‐xylene | Total BTEX | Total PAH (2, 3 rings) | |
|---|---|---|---|---|---|---|---|
| Marine water | |||||||
| Salobreña | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.0045 |
| Motril | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.0057 |
| Messina | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.0105 |
| Gela | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.0117 |
| Edaphic sediments | |||||||
| Messina | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.0041 |
| Gela | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.0504 |
| Oil and derivates | |||||||
| Petrol | 5248.7250 | 32 807.6250 | 8647.1250 | 16 481.7500 | 11 175.3750 | 74 360.6000 | 153.5490 |
| Diesel | 177.8800 | 604.2850 | 1082.6650 | 2363.3400 | 1823.0950 | 6051.2650 | 70.0740 |
| Prestige | 0.0405 | 0.1080 | 0.0875 | 0.1298 | 0.1186 | 0.4844 | 0.1938 |
| Crude oil | 0.00 | 0.0461 | 0.0597 | 0.0909 | 0.0777 | 0.2745 | 1.2982 |
| Soil 0.01% | |||||||
| Day 1 | 0.018 | 0.106 | 0.016 | 0.019 | 0.031 | 0.19 | nd |
| Day 3 | 0.015 | 0.078 | 0.015 | 0.021 | 0.028 | 0.155 | nd |
| Day 6 | 0.009 | 0.033 | 0.012 | 0.018 | 0.026 | 0.098 | nd |
| Soil 0.10% | |||||||
| Day 1 | 0.026 | 0.384 | 0.095 | 0.111 | 0.292 | 0.908 | nd |
| Day 3 | 0.018 | 0.166 | 0.034 | 0.052 | 0.132 | 0.401 | nd |
| Day 6 | 0.019 | 0.138 | 0.028 | 0.025 | 0.113 | 0.322 | nd |
| Soil 0.50% | |||||||
| Day 1 | 0.057 | 1.263 | 0.592 | 1.289 | 2.129 | 5.329 | nd |
| Day 3 | 0.026 | 0.493 | 0.238 | 0.477 | 1.114 | 2.348 | nd |
| Day 6 | 0.027 | 0.377 | 0.155 | 0.362 | 0.668 | 1.588 | nd |
Diesel was prepared as a 0.02% solution and petrol as 0.004% in water for GC analysis; concentrations in the table referred to pure diesel or petrol.
Saturated samples (1 g of crude oil and 4 g of Prestige spill oil) were added to the corresponding minimal media and gently agitated overnight in a closed bottle in the dark.
No preparation was needed for Mesina, Gela, Motril and Salobreña water solutions; samples were added directly to the GC‐MS vials. For Gela and Mesina edaphic sediment samples, 5 g of sediment was added to 5 ml of water and agitated overnight in a closed bottle. Samples were analysed after centrifugation to avoid any material in suspension.
In soil experiments, the soil was contaminated with 0.01%, 0.1% or 0.5% (v/w) of petrol; 2 g of soil containing was added to 6.5 ml of water. After vortexing for 1 min, samples were centrifugated at 9500 rpm at room temperature for 10 minutes; 2 ml of the supernatant was transferred to 20 ml tube and water was added to 10 ml total.
Values are given in mg l−1.
n.d.: not determined.