| 长江口及浙江近岸海域表层沉积物中多环芳烃分布、来源与风险评价 |
| 摘要点击 3666 全文点击 1522 投稿时间：2014-08-28 修订日期：2014-10-21 |
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| 中文关键词 长江口 浙江近岸海域 沉积物 多环芳烃 分布 来源 风险评价 |
| 英文关键词 Yangtze estuary Zhejiang coastal areas sediments PAHs distribution sources risk assessment |
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| 中文摘要 |
| 2013年对长江口及浙江近岸海域62个站位表层沉积物中多环芳烃(PAHs)进行了测定. 结果表明,16种美国EPA优先控制的PAHs均有检出,PAHs总量水平(干重)为31.8~384 μg·kg-1,平均含量为131.1 μg·kg-1. 其分布受到陆源输入和点源污染的影响,高值区域出现在长江口2号站位和宁波21号站位附近. 与国内外其它海区相比,调查海域PAHs总体处于较低污染水平. 调查海域沉积物中PAHs以4环、3环为主,来源分析显示PAHs主要来源于木柴、煤炭燃烧. 利用沉积物质量基准法(SQGs) 评价结果显示,调查海域表层沉积物中PAHs处于较低的生态风险水平; 按照沉积物质量标准法(SQSs)评价结果表明,调查海域表层沉积物的PAHs污染已经具有一定程度的"显见生态负效应",需要采取相应的措施进行污染控制和削减. |
| 英文摘要 |
| PAHs contents of surface sediments were tested from 62 sampling sites of the Yangtze River estuary and Zhejiang coastal zone in 2013. The results showed that: 16 kinds of PAHs, which are listed as priority pollutants by EPA, were found in all the samples. The total PAHs level (dry weight) reached 31.8-384 μg·kg-1 and the average amount was 131.1 μg·kg-1. The distribution of PAHs was affected by terrigenous input and point source pollution, the high-value zones were found at 2# sampling site of the Yangtze River estuary and 21# sampling site of Ningbo. Compared with other sea areas, the survey sea area was at a low PAHs pollution level. PAHs were primarily tetracyclic or tricyclic, and source analysis showed that most of PAHs were originated from combustion of wood and coal. Based on the Sediment Quality Guidelines (SQGs), the assessment result showed that the PAHs content of surface sediments from survey sea area was at a relatively low level of ecological risk; While according to the assessment result of the Sediment Quality Standards (SQSs), PAHs pollution of surface sediments from survey sea area displayed an "Obviously negative ecological effect" to some extent, and some countermeasures are required to control and eliminate pollutions. |
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