松花江河漫滩沉积物柱样中PAHs分布的年代特征

发布时间：2019-01-08 12:15

【摘要】：利用~(210)Pb和~(137)Cs定年技术结合松花江河漫滩沉积物柱样中多环芳烃(PAHs)的检测结果分析PAHs在近90年间的年代特征.结果表明,松花江河漫滩沉积物中PAHs质量比在1960年以后急剧增加,20世纪90年代初期达到峰值后呈下降趋势,与我国滇池和其他部分城市湖泊沉积记录基本一致,但与发达国家同类研究结果明显不同.与国内其他河流沉积物相比,松花江PAHs污染处于中等水平,呈现以萘、菲等低环化合物为主的污染特征.根据PAHs环数的相对丰度、w(蒽)/w(蒽+菲)、w(荧蒽)/w(荧蒽+芘),沉积物PAHs主要来源于石油类污染.PAHs质量比的阶段性变化与流域内近90年的人口、GDP均显著相关,即松花江PAHs污染与人类活动显著相关.
[Abstract]:Using ~ (210) Pb and ~ (137) Cs dating techniques combined with the detection results of polycyclic aromatic hydrocarbons (PAHs) (PAHs) in sediment column of Songhua River floodplain, the chronological characteristics of PAHs in recent 90 years were analyzed. The results show that the mass ratio of PAHs in floodplain sediments of Songhua River increased sharply after 1960, and decreased after reaching its peak in the early 1990s, which is basically consistent with the records of lake sediments in Dianchi Lake and other cities in China. But the results are obviously different from those in developed countries. Compared with other river sediments in China, the PAHs pollution in Songhua River is at a medium level, showing the pollution characteristics of naphthalene, phenanthrene and other low cyclic compounds. According to the relative abundance of PAHs rings, w (anthracene / w (), w (fluoranthene) / w (fluoropyrene), the main sources of PAHs in sediments are petroleum pollution, the periodic change of PAHs mass ratio and the population of the basin for nearly 90 years. GDP was significantly correlated with PAHs pollution in Songhua River and human activities.
【作者单位】：吉林大学地下水资源与环境教育部重点实验室水资源与水环境吉林省重点实验室环境与资源学院;
【基金】：国家水体污染控制与治理科技重大专项基金(批准号:2009ZX0707-001-03) 高等学校博士学科点专项基金(批准号:20100061110041) 吉林省环保局项目(批准号:2009-19)
【分类号】：X52

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