| 青藏高原东缘冻土中有机磷酸酯的污染特征 |
| 摘要点击 1862 全文点击 518 投稿时间：2020-11-23 修订日期：2020-12-31 |
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| 中文关键词 高原 土壤 有机磷酸酯(OPEs) 分布 迁移 来源 |
| 英文关键词 plateau soil organophosphate esters (OPEs) distribution migration source |
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| 中文摘要 |
| 于2019年12月在青藏高原东部边缘地带采集季节性冻土样品，分析其有机磷酸酯（OPEs）的含量及分布特征，并探讨其来源.结果表明，7种目标OPEs，磷酸三丁酯（TnBP）、磷酸三异辛酯（TEHP）、磷酸三丁氧乙酯（TBEP）、磷酸三苯酯（TPhP）、磷酸三氯乙酯（TCEP）、磷酸三氯丙酯（TCPP）和磷酸三（2，3-二氯丙基）酯（TDCPP）均检出.Σ7OPEs在表层（0~10 cm）及次表层（10~20 cm）土壤样品中的含量（ng·g-1）分别为146.7~348.7（平均值231.1）和206.5~333.2（260.2）.该含量与城市土壤可比，值得关注.TBEP和TDCPP是丰度较高的单体.OPEs的空间污染显著受到点源排放影响，大气沉降对所有点位的OPEs输入有一定贡献.不同单体在土壤中的迁移程度差别较大，芳基类的TPhP迁移趋势强于氯代OPEs.主成分分析表明，青藏高原东部地区土壤中OPEs的主要来源有大气干湿沉降、人为带入的消费材料和汽车内饰物中OPEs的释放等. |
| 英文摘要 |
| In this study, soil samples were collected from the eastern edge of the Qinghai Tibet Plateau in December 2019. The level and distribution characteristics of organophosphate esters (OPEs) in seasonal frozen soil were analyzed, and their sources were discussed. The results showed that the target analytes including tri-n-butyl phosphate (TnBP), tris(2-ethylhexyl) phosphate (TEHP), tributoxyethyl phosphate (TBEP), triphenyl phosphate (TPhP), tri(2-chloroethyl) phosphate (TCEP), trichloropropyl phosphate (TCPP), and tris-(2,3-dichloropropyl) phosphate (TDCPP) were detected with 100% frequency. Levels of Σ7OPEs in topsoil (0-10 cm) and sub topsoil (10-20 cm) were 146.7-348.7 ng·g-1 (mean:231.1 ng·g-1) and 206.5-333.2 ng·g-1 (mean:260.2 ng·g-1), respectively. The Σ7OPEs content level is comparable to that of urban soil,which is worthy of attention. TBEP and TDCPP were the most abundant compounds in the plateau soil. Point source emissions have significant influence on the spatial distribution of OPEs, and regional deposition of OPEs contributes to all sampling sites. The migration ability of different OPE compounds in soil was different. Stronger migration ability was observed for aromatic OPEs (TPhP) than chlorinated OPEs. Principal component analysis showed that the main sources of OPEs in plateau soil were atmospheric wet and dry deposition, manufactured consumer materials, and the release of OPEs from automobile interior decoration. |
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