青海湖沉积物中多环芳烃的沉积记录
Historical records of sediment polycyclic aromatic hydrocarbons in Qinghai Lake,Northwest China
查看参考文献27篇
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文摘
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采用GC/MS方法分析了青海湖沉积柱中16种美国EPA优先控制的多环芳烃（TPAHs）的垂直分布状况,并对其来源进行了分析。研究表明,020 cm沉积柱中TPAHs的含量为495.11172.5 ng.g-1,随沉积年代的更新TPAHs的含量呈增加趋势。这与珠江口和东海沉积柱中的记录基本一致,但明显不同于发达国家同类研究的结果。青海湖沉积物PAHs以23环（包括萘、苊、苊烯、芴、菲和蒽）为主,其含量平均占沉积物中PAHs总量的（72.4±8.9）%。青海湖沉积物中的PAHs主要来自长距离的大气传输,家庭燃煤与木材的低温燃烧是其主要来源,高温燃烧过程释放的PAHs（如机动车尾气的排放）近年来有明显增加的趋势。 |
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其他语种文摘
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By adopting GC/MS techniques,this paper analyzed the vertical distribution of 16 priority polycyclic aromatic hydrocarbons(PAHs)proposed by US EPA in a dated 0-20 cm sediment core from Qinghai Lake in Northwest China,and identified the possible sources of the PAHs.The total PAHs(sum of 16 the priority PAHs,TPAHs)concentration in the core ranged from 495.1 to 1172.5 ng.g-1,and had an increasing trend from deeper layer to surface layer.The vertical profile of the sediment PAHs in Qinghai Lake was basically similar to that in the East China Sea and the Pearl River Estuary,but clearly different from that in developed countries.The sediment PAHs in Qinghai Lake were dominated by 2-3 rings PAHs(including naphthalene,acenaphthylene,acenaphthene,fluorene,phenanthrene,and anthracene),accounting for 72.4%±8.9% of TPAHs on an average.The sediment PAHs in Qinghai Lake were mainly originated from the long-distance atmospheric transport resulting from low temperature combustion of domestic coal and woods,but the PAHs from high temperature process(such as vehicle emission)had an obvious increasing trend in recent years. |
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来源
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生态学杂志
,2011,30(7):1467-1472 【核心库】
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关键词
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青海湖
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沉积柱
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多环芳烃
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来源
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地址
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 550002
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中国环境科学研究院湖泊生态环境研究中心, 国家环境保护湖泊污染国家重点实验室, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-4890 |
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学科
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环境科学基础理论 |
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基金
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国家自然科学基金项目
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国家973计划
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中国科学院西部之光人才培养计划
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文献收藏号
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CSCD:4261047
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