| Budget Amount *help |
¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Research Abstract |
To research the environmental contamination of a tidal flat, caused by a fire in a neighboring refinery on March 11, 2011, we measured the concentration of eight polycyclic aromatic hydrocarbons(PAHs) including benzo [a] pyrene in the sediment of the tidal flat and investigated the change in the PAH concentrations with the lapse of time. After a month from the fire, we collected for the sediment and measured the PAH concentrations, which ranged from 1.7 to 28.4 ug/kg-dry. The concentrations were about 3 times as high as those before the outbreak of the fire. After one year from the accident, we repeated the sampling and measurement : the concentrations ranged from 1.0 to 5.1 ug/kg-dry.
Therefore it was confirmed that the PAH concentrations in the tidal flat increased once, but then gradually decreased down to a level similar to that before the fire over about a year.
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