农业环境科学学报2012，Vol.31Issue(1)：60-66,7.
兰州地区PCBs的长距离传输潜力及其总持久性模拟研究
Simulation of Long-Range Transport Potential and Overall Persistence of Polychlorinated Biphenyls (PCBs) ·in Lanzhou Area, China
摘要
Abstract
Poly chlorinated 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( Pw) 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 Pw of 7 congeners of PCBs through air and water in Lanzhou area were calculated by TaPL3 model.Futhermore,the relationships between the LRTP and Pw 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 CTDw of 7 PCB congeners through the atmosphere were between 250～2 500 km, while Pw 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 CTDsim otherwise, congeners of PCB28,PCB52,PCB77,PCB101 with larger CTDau tend to transport to remote area by air. Meanwhile the CTDwater of 7 PCB congeners were between 6 500～61 000 km and Pw 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 Pw of 7 PCBs congeners. Futhermore, the physical and chemical parameter (lg Kw) is the most influential parameters for Pw and CTDair when PCBs were emitted into the atmosphere. Moreover, Pw 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 Pw. 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, Pw are significantly higher through both water and atmosphere.关键词
PCBs/TaPL3/持久性有机物/长距离传输潜力/总持久性Key words
PCBs/TaPL3/persistent organic pollutants(POPs)/long-range transport potential(LRTP)/overall persistence(Pw)分类
资源环境引用本文复制引用
马子龙,高宏,方利江,丁中原,吴有方,柳敏,吴军年..兰州地区PCBs的长距离传输潜力及其总持久性模拟研究[J].农业环境科学学报,2012,31(1):60-66,7.基金项目
国家自然科学基金资助项目(40971267/D010903) （40971267/D010903）
"春晖计划"国际合作科研项目(Z2008-1-62025) （Z2008-1-62025）
