|
| Spatial Distribution and Source Apportionment of PAHs in Sediments from Taihu Lake |
| Received:July 30, 2014 |
| View Full Text View/Add Comment Download reader |
| KeyWord:PAHs;source apportionment;Principal Component Analysis with Multiple Linear Regression(PCA-MLR);Taihu Lake |
| Author Name | Affiliation | E-mail | | WU Ting | Center for environmental education and communications of Tianjin, Tianjin 300191, China | | | LIU Gui-rong | Department of Environment Science and Engineering, Nankai University, Tianjin 300071, China | | | TIAN Ying-ze | Department of Environment Science and Engineering, Nankai University, Tianjin 300071, China | | | Yang Yong | China National Environmental Monitoring Center, Beijing 100012, China | | | JIA Xiao-bo | State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | ZHANG Yuan | State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | GUO Chang-sheng | State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | guocs@craes.org.cn |
|
| Hits: 4127 |
| Download times: 4516 |
| Abstract: |
| Polycyclic aromatic hydrocarbons(PAHs) are ubiquitous in nature, and are of environmental concern. In this study, a total of 29 sediment samples from the Taihu Lake were used to investigate the spatial distribution and possible sources of 16 priority PAHs. The ratio method, Hierarchical cluster analysis, and Principal Component Analysis with Multiple Linear Regression(PCA-MLR) were employed to determine the potential sources and to quantify their contributions to PAHs in the sediments. The sum of 16 PAHs(ΣPAHs) ranged from 255.1 to 1059.4 ng·g-1, with an average concentration of 580.5 ng·g-1. BbF was the most abundant PAH compound in the sediments, with the average concentration greater than 80 ng·g-1. The concentrations of PAHs were higher at the side of the lake than at the lake center. Gasoline and diesel emissions were the most significant contributors(53%) to PAHs, followed by coal and wood combustions(46%). In addition, BaPE was applied to assess the carcinogenic risk of PAHs in the sediments. The calculated BaPE were (50.37±19.70)ng·g-1, suggesting the potential risk from the sediments. These results would advance our understanding of pollution status and sources of PAHs in the Taihu sediments, which may help propose control measures for PAHs in the sediments. |
|
|
|
