Volume 39 Issue 5
Sep.  2020
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Liao Ting, Xing Xinli, Shi Mingming, Liu Weijie, Cheng Cheng, Hu Tianpeng, Qi Shihua. Multimedia fate modeling of PAHs in Dajiuhu, Shennongjia[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 148-155. doi: 10.19509/j.cnki.dzkq.2020.0512
Citation: Liao Ting, Xing Xinli, Shi Mingming, Liu Weijie, Cheng Cheng, Hu Tianpeng, Qi Shihua. Multimedia fate modeling of PAHs in Dajiuhu, Shennongjia[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 148-155. doi: 10.19509/j.cnki.dzkq.2020.0512

Multimedia fate modeling of PAHs in Dajiuhu, Shennongjia

doi: 10.19509/j.cnki.dzkq.2020.0512
  • Received Date: 29 Aug 2019
  • A Level III fugacity model was used to simulate the fate of seven US-EPA priority polycyclic aromatic hydrocarbons (PAHs), including NaP, Phe, Fla, BaA, Chr, Pyr, and BaP, in Dajiuhu, Shennongjia. Monitoring data of PAHs in study areas were used to verify reliability of this model. Meanwhile, the influence of climate factors (i.e., temperature and precipitation) on the transport of PAHs in different environmental media was integrated into the model to discuss the effect of climate change on the transport trend of PAHs in Dajiuhu. The results show that the data from model computation fits with the measured values of PAHs very well. The transfer flux of different PAHs between different phases is totally different. PHAs of ring 2 and ring 3 are dominated by sediments to water, water to air, indicating the characteristics of releasing from sediments to water and air; while PAHs of ring 4 and ring 5 are dominated by from air to soil and from water to sediments, reflecting the characteristics of deposition from air to soil and sediments. A significant positive correlation between temperature and net flux of water-air, soil-air and sediment-water interface was observed. There was a negative correlation between precipitation and net exchange flux at water-air and soil-air interfaces, while a positive correlation between precipitation and sediment-water interfaces. Our results suggested that attentions should be paid to the secondary pollution release from soil, water and sediment caused by climate change.

     

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