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| Analysis of long-range transport potential (LRTP) of polycyclic aromatic hydrocarbons (PAHs) in environments of the Yanghe Watershed |
| Received:December 29, 2016 |
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| KeyWord:TaPL3 model;PAHs;long-range transport potential;overall persistence |
| Author Name | Affiliation | E-mail | | GAO Jia-jia | Tibet Climatic Center, Lhasa 850000, China
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | | | LUO Wei | State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | luow@rcees.ac.cn |
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| Abstract: |
| The long-range transport potential(LRTP) and overall persistence(Pov) of 16 PAHs in air and water within the Yanghe Watershed were estimated using the Transport and Persistence Level Ⅲ(TaPL3) model. Characteristic travel distances(CTDs) and Povs of PAH isomers were compared and the relationships between the CTDs and the Pov s were discussed. Key parameters of the model were validated using a case study of sensitivity analysis of the parameters influencing CTDs and Povs of benzopyrene(BaP). Results indicated that the CTD of 16 PAHs in air ranged from 13 km(DBA) to 712 km(Flu) and the Pov-air from 0.33 d(Acy) to 907 d(BaP). Soil was the main sink of PAHs in air, which accounted for about 60 percent of total PAHs in air. The CTD of 16 PAHs in water ranged from 111 km(Flu) to 2512 km(Pyr), and the Pov-water ranged from 4.5 d(Nap) to 3293 d(BghiP). Sediment was the main sink of PAHs in water, which accounted for about 4 percent of total PAHs in water. Wind flow velocity and half-life of PAHs in soil were the two key parameters influencing CTDair and Pov-air. Water flow velocity and octanol-water partition coefficient(Kow) were the key parameters influencing CTDwater and Pov-water. Considering the great CTDs of PAHs and their potential danger to environments and ecosystems of Beijing, PAH abatement measures should be taken by PAH-related key enterprises within the Yanghe Watershed in the future. |
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