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- W2356275412 abstract "Polychlorinated Biphenyls(PCBs) are a group of persistent organic pollutants(POPs),which can be away from the source area and distribute on a global scale because of its long-range transport,bioaccumulation and persistence characteristic.So they already become a threat to human health and ecosystems.Therefore,it is very significant to estimate the long-range transport potential(LRTP) and the overall persistence(Pov) of PCBs,in which that the PCBs environmental risk to the ecological system and human health of local and remote areas can be assessed and also it is available to manage and authorized controlled specified chemicals.In this paper,the characteristic travel distance(CTD) and Pov of 7 congeners of PCBs through air and water in Lanzhou area were calculated by TaPL3 model.Futhermore,the relationships between the LRTP and Pov were also discussed.In addition,the uncertainty of the model was identified by sensitivity analysis method taking PCB28 as an example.Modeling results indicated that CTDair of 7 PCB congeners through the atmosphere were between 250~2 500 km,while Pov were between 500~33 000 d,in which we can deduced that congeners of PCB138,PCB153 and PCB180 had the greater impact on the source region because of their smaller CTDair,otherwise,congeners of PCB28,PCB52,PCB77,PCB101 with larger CTDair tend to transport to remote area by air.Meanwhile the CTDwater of 7 PCB congeners were between 6 500~61 000 km and Pov were between 850~36 000 d in water,in which PCB28,PCB52,PCB77 and PCB101 had the greater impact on the water environment of source region because of their smaller CTDwater in water otherwise,PCB138,PCB153,PCB180 tend to away from water body of local area and flow to other regions by water.In addition,the study results also showed that there were no direct relationships between the LRTP and Pov of 7 PCBs congeners.Futhermore,the physical and chemical parameter(lg Kow) is the most influential parameters for Pov and CTDair when PCBs were emitted into the atmosphere.Moreover,Pov were more dependent on physical and chemical properties of PCBs than the CTDwater when PCBs were discharged into the water,while the CTDwater were more dependent on environmental conditions than Pov.Compared to the similar foreign research,the CTDair of PCB28 through atmosphere in Lanzhou was obviously lower,and the CTDwater of it through water was significantly higher,however,Pov are significantly higher through both water and atmosphere." @default.
- W2356275412 created "2016-06-24" @default.
- W2356275412 creator A5013048708 @default.
- W2356275412 date "2012-01-01" @default.
- W2356275412 modified "2023-09-27" @default.
- W2356275412 title "Simulation of Long-Range Transport Potential and Overall Persistence of Polychlorinated Biphenyls(PCBs) in Lanzhou Area,China" @default.
- W2356275412 hasPublicationYear "2012" @default.
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