L1 /
12
CH3041
PAHs II
• Not all PAHs are man-made, crude oil contains 0.2 - 7% PAHs (moderate temp. diagenesis of organic sediments).
• PAHs partition
onto particles in the air
and fine sediments in the aqueous environment.
and fine sediments in the aqueous environment.
• In the air PAHs
are typically found at levels
around 0.1 ppm, London smog > 100 ppm.
around 0.1 ppm, London smog > 100 ppm.
• Natural
environment bottom sediments
will contain PAHs at around 10 ppb.
will contain PAHs at around 10 ppb.
• Sediments receiving drainage from industrial sites will be around 100
ppm.
