| 鄱阳湖沉积物中多环芳烃的时空分布及源解析 |
| 摘要点击 612 全文点击 147 投稿时间：2023-04-01 修订日期：2023-06-02 |
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| 中文关键词 鄱阳湖 沉积物 多环芳烃(PAHs) 时空分布 源解析 |
| 英文关键词 Poyang Lake sediment polycyclic aromatic hydrocarbons (PAHs) spatial and temporal distribution source analysis |
| 作者 | 单位 | E-mail | | 马妍 | 中国矿业大学(北京)化学与环境工程学院, 北京 100083 | mayan2202@163.com | | 孙晨 | 中国矿业大学(北京)化学与环境工程学院, 北京 100083
北京师范大学水科学研究院, 北京 100875 | | | 毕笳乐 | 中国矿业大学(北京)化学与环境工程学院, 北京 100083
北京师范大学水科学研究院, 北京 100875 | | | 张波涛 | 北京师范大学水科学研究院, 北京 100875 | zhangbotao@126.com | | 刘艳 | 北京市科学技术研究院分析测试研究所(北京市理化分析测试中心), 北京 100094 | xgly36@163.com | | 邵鹏 | 北京市科学技术研究院分析测试研究所(北京市理化分析测试中心), 北京 100094 | | | 刘统 | 中国矿业大学(北京)化学与环境工程学院, 北京 100083
北京师范大学水科学研究院, 北京 100875 | | | 王圣瑞 | 北京师范大学水科学研究院, 北京 100875 | | | 钟文军 | 江西省林业科学院湿地生态资源研究中心, 南昌 330032 | |
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| 中文摘要 |
| 对鄱阳湖沉积物中16种多环芳烃（PAHs）含量、时空分布及影响因素进行了研究，并对湖体不同区域的PAHs进行定量源解析.PAHs在沉积物中广泛存在，所有点位表层沉积物中ω （∑16PAHs）范围为203~2 318 μg·kg-1，其中湖体表层沉积物中PAHs含量高于入湖河流表层沉积物中PAHs含量.鄱阳湖PAHs环数比例大小依次排列为：4环>5环>6环>3环>2环，4环PAHs组成占主导地位，其含量占∑16PAHs的比例高达86.11%.2~3环以及部分4环PAHs包括Flua和Pyr更容易受到SOM的影响，4~6环PAHs更容易受到ORP及重金属等环境因子的影响.在空间分布上，∑16PAHs的较高含量位于湖体邻近都昌县与鄱阳县区域，此区域地形相对封闭，与周围区域水流交换量小，不利于污染物的迁移、转化及降解.在时间分布上，PAHs含量水平的变化与江西省GDP的发展呈现出高度一致性，经济发展和人类活动影响可能是导致PAHs含量水平不断增加的主要原因.鄱阳湖表层沉积物PAHs的主要来源包括石油污染及石油、煤炭和生物质燃烧源，不同区域PAHs来源存在一定的空间差异.本研究可为鄱阳湖表层沉积物中PAHs污染情况提供参考，对鄱阳湖生态环境保护和治理具有重要意义. |
| 英文摘要 |
| The concentrations, spatial-temporal distribution, and influencing factors of 16 polycyclic aromatic hydrocarbons (PAHs) in the sediments of Poyang Lake were studied, and a quantitative source analysis of PAHs in different areas of the lake was conducted. PAHs were widespread within the sediments. The concentrations of ∑16PAHs in the surface sediments of all sites ranged from 203 to 2 318 μg·kg-1. The concentrations of PAHs in the surface sediments of the lake body were higher than those in the surface sediments of the inlet rivers. The ratio of PAHs in Poyang Lake was 4 rings > 5 rings > 6 rings > 3 rings > 2 rings; the composition of 4-ring PAHs was dominant, and its content accounted for 86.11% of ∑16PAHs. The 2- and 3-ring and some 4-ring PAHs, including Flua and Pyr, were more susceptible to SOM, and the 4 through 6-ring PAHs were more susceptible to ORP and heavy metals and other environmental factors. Spatially, the higher concentration of ∑16PAHs occurred in the area of the lake adjacent to Duchang County and Poyang County, where the terrain was relatively closed, and the water exchange with the surrounding area was less than that in other sections, which was not conducive to the migration, transformation, and degradation of pollutants. In the temporal distribution, the changes in PAHs concentration level and the development of GDP in Jiangxi Province showed high consistency, and the influence of economic development and human activities might have been the main reason for the increasing PAHs concentration level. The main sources of PAHs in surface sediments of Poyang Lake included petroleum pollution and oil and coal and biomass combustion sources, and there were some spatial differences in PAHs sources in different regions. This study can provide a reference for PAHs pollution in surface sediments of Poyang Lake, which is important for the ecological environmental protection and management of Poyang Lake. |
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