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| Simulation of long-range transport potential and overall persistence of PBDEs in Guangzhou |
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Abstract The long-range transport potential(LRTP)and overall persistence(Pov)of 7 PBDEs through air and water in Guangzhou were estimated using the TaPL3.0 model. In addition, the key parameters of the model were identified by sensitivity analysis method. The study results suggested that the CTD(air) ranged from 296 km to 811km, and the mean value was 557 km. Pov(air) was between 19 and 279d, and the mean value was 184d.There were near 73.8% of PBDEs distributed in soil, 16.9% in sediment, and 1.3% in water, respectively. While the CTD(water) was from 3090km to 4291km, and the mean value was 3731km, Pov (water) was from 228d to 854d, and the mean value was 731d. There were near 92.1% of PBDEs distributed in sediment, 6.8% in water, respectively 1.1% in other environmental media including air, soil and plants. Futhermore, this case study also showed that the BDE47 congener exhibited the strongest transport potential and transported to remote regions, moreover, BDE209 tended to stay in the study area. The 7 congeners of PBDEs distributed mainly in sediment and soil. This paper also indicated that the CTD values tended to be lower with the increase of Br numbers , on the contrary, Pov values tended to be higher. In addition, the research conclusions well agreed with the study results of similar foreign research.
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Received: 18 July 2011
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TIAN Hui, GUO Qiang, MAO Xiao-Xuan, HUANG Tao, MA Jian-Min, WU Jun-Nian, ZHANG Gan, LI Jun, GAO Hong. Simulating the transfer and fate of typical PBDEs in Guangzhou[J]. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(3): 758-765. |
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