The present study was used freshwater Crab （Sesarma boulengeri Caiman） as bioindicator to measured the PAHs levels in AI-Hilla River, Iraq, during the period from March 2010 to February 2011. Crab samples were colle...The present study was used freshwater Crab （Sesarma boulengeri Caiman） as bioindicator to measured the PAHs levels in AI-Hilla River, Iraq, during the period from March 2010 to February 2011. Crab samples were collected from two sites on the AI-Hilla River. Sixteen of PAils compounds were identified seasonally in these samples. High mean value was （72.06 μg/g）, recorded by Dibenzo （a, h） anthracene （DbA） in Site 1 and low mean value was （0.36 μg/g） recorded by Anthracene （Ant） in Site 2. The study showed a clear variation in PAHs concentration independent from the seasons and locations. Site 1 recorded high value of HMW （high molecular weight） and LMW （low molecular weight） more than Site 2. The present study revealed that all PAHs compounds were from Pyrogenic Origin. Seven carcinogenic PAHs （cPAHs） were recorded in crab tissues that were collected from the AI-Hilla River. The TEF （toxicity equivalency factor） was calculated to toxicity equivalent crab concentration. From the results, the fresh water Crab Sesarma boulengeri is a good bioindicator to water pollution by PAHs.展开更多
文摘The present study was used freshwater Crab （Sesarma boulengeri Caiman） as bioindicator to measured the PAHs levels in AI-Hilla River, Iraq, during the period from March 2010 to February 2011. Crab samples were collected from two sites on the AI-Hilla River. Sixteen of PAils compounds were identified seasonally in these samples. High mean value was （72.06 μg/g）, recorded by Dibenzo （a, h） anthracene （DbA） in Site 1 and low mean value was （0.36 μg/g） recorded by Anthracene （Ant） in Site 2. The study showed a clear variation in PAHs concentration independent from the seasons and locations. Site 1 recorded high value of HMW （high molecular weight） and LMW （low molecular weight） more than Site 2. The present study revealed that all PAHs compounds were from Pyrogenic Origin. Seven carcinogenic PAHs （cPAHs） were recorded in crab tissues that were collected from the AI-Hilla River. The TEF （toxicity equivalency factor） was calculated to toxicity equivalent crab concentration. From the results, the fresh water Crab Sesarma boulengeri is a good bioindicator to water pollution by PAHs.
