Ecological risk assessment of polycyclic aromatic hydrocarbons in surface sediments from the middle and lower reaches of the Yellow River,China |
| |
| Authors: | Jinglan Feng Pengtuan Hu Fei Zhang Yufan Wu Shuhui Liu |
| |
| Institution: | School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan, PR China |
| |
| Abstract: | In this research, ecological risks for eight individual polycyclic aromatic hydrocarbons (PAHs) and ∑PAH8 in surface sediments from middle and lower reaches of Yellow River are evaluated using overlapping areas of probability density curves and margin of safety (MOS), based on the toxicity data and the exposure concentrations of PAHs in sediments collected from 23 sites. In the overlapping areas of probability density curves, the risk of Ant and Pyr are the highest, then the risk level is in the order of Flua > Nap > Phe > BaP > Flu > Ace. The values of MOS10 present that Pyr (4.62 × 10?4), Ant (5.60 × 10?3), and Flua (6.4 × 10?3) have a significantly high ecological risk level, while Nap and Phe have middle-level ecological risk. As for Ace, BaP, and Flu, they pose limited risk to the ecological system with MOS10 greater than 1.0. The ∑PAH8 (2.66 × 10?5) is a higher risk level than that of any individual PAHs, where the probabilities of ∑PAH8 in excess of the 10th percentile of the toxicity data were 86%. |
| |
| Keywords: | ecological risk assessment polycyclic aromatic hydrocarbons sediment middle and lower reaches of Yellow River |
|
|
