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题名: Influence of long-range atmospheric transportation (LRAT) on mono- to octa-chlorinated PCDD/Fs levels and distributions in soil around Qinghai Lake, China
作者: Han, Ying; Liu, Wenbin; Hansen, Hans Chr. Bruun; Chen, Xuebin; Liao, Xiao; Li, Haifeng; Wang, Mengjing; Yan, Nan
刊名: CHEMOSPHERE
出版日期: 2016-08
卷号: 156, 期号:0, 页码:143-149
关键词: Qinghai Lake ; Chlorinated PCDD/F ; Distribution characteristic ; Remote area ; Cold region
DOI: 10.1016/j.chemosphere.2016.04.110
部门归属: 环境化学与生态毒理学国家重点实验室
英文摘要: Long-range atmospheric transportation (LRAT) of persistent organic pollutants followed by their deposition in cold, arid regions is of wide concern. This problem occurs at Qinghai Lake in the northeastern Tibetan Plateau, a sparsely populated area with extreme weather conditions and little current or historical anthropogenic pollution. The concentrations and distribution patterns of the mono-to octachlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) congeners in surface soil samples collected from around Qinghai Lake were quantified. Concentration differences between low-(mono-to tri-) chlorinated PCDD/Fs and high-(tetra-to octa-) chlorinated PCDD/Fs were measured. High PCDD/F levels were detected, with total concentrations of 15,108 +/- 6323 pg/g for the 27 PCDD/F congeners and 15,104 +/- 6324 pg/g for the low-chlorinated PCDD/Fs. The concentrations of 17 2,3,7,8-substituted PCDD/Fs were only 3.1 +/- 4.4 pg/g and the corresponding international toxicity equivalency (I-TEQ) was 0.11 +/- 0.22 pg I-TEQ/g. Given their higher vapor pressures and lower boiling points, low-chlorinated PCDD/Fs, were predominantly gaseous, whereas high-chlorinated PCDD/Fs were predominantly solid, indicating that there is a higher potential for long-range transport of low-chlorinated PCDD/Fs. Overall, because of their high LRAT potential, low-chlorinated PCDD/Fs may pose a greater risk to local ecosystems in cold, remote areas than high-chlorinated PCDD/Fs. (C) 2016 Elsevier Ltd. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35875
Appears in Collections:环境化学与生态毒理学国家重点实验室_期刊论文

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Recommended Citation:
Han, Ying,Liu, Wenbin,Hansen, Hans Chr. Bruun,et al. Influence of long-range atmospheric transportation (LRAT) on mono- to octa-chlorinated PCDD/Fs levels and distributions in soil around Qinghai Lake, China[J]. CHEMOSPHERE,2016,156(0):143-149.
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