Simulation study on the long-range transport potential and overall persistence of 16 PAHs in Lanzhou
兰州地区16种多环芳烃的长距离迁移潜力和总持久性模拟研究

The long-range transport potential (LRTP) and overall persistence (Pov) of 16 polycyclic aromatic hydrocarbons (PAHs) through air and water in Lanzhou were estimated by the TaPL3 model. The characteristic travel distance (CTD) and Pov of PAHs with different rings were compared and the relationship between CTD and Pov was discussed. In addition, the key parameters were examined by sensitivity analysis method using BaP as an example. The results indicated that the CTDAir of 16 PAHs in Lanzhou ranged from 18.9 km (BghiP) to 734.9 km (PYR), and the PovAir from 0.41 d (ACE) to 1304.76 d (BaP). Meanwhile, the CTDWater ranged from 511.1 km (NAP) to 34472.6 km (BghiP), and the PovWater from 5.35 d (NAP) to 4156.59 d (BghiP). This case study also showed that the LRTP of PYR through air was highest, while the LRTP of BghiP through water was highest. PAHs with middle and high molecular weights exhibited higher PovAir and PovWater than those with low molecular weights. Furthermore, there was no direct association between CTD and Pov. Compared with the similar studies overseas, the CTDAir of BaP in Lanzhou was obviously lower.