杭州湾潮滩表层沉积物中多环芳烃的分布及来源

Distribution and source identification of polycyclic aromatic hydrocarbons in the tide-beach surface sediments of Hangzhou Bay

对杭州湾潮滩表层沉积物样品中的多环芳烃（PAHs）进行了定量分析．结果表明，沉积物中PAHs总含量范围为45．78-849．93ng／g．PAHs的空间分布总体呈现钱塘江杭州河段〉杭州湾南岸〉杭州湾北岸．PAHs含量分布与有机碳（TOC）含量存在良好的线性关系，受人类活动和水动力条件的影响较大．样品中PAHs的燃烧来源所占的比重较大，呈现出油料燃烧与术材、煤燃烧的混合污染来源特征．该地区表层沉积物样品中的PAHs尚未对生物造成显著的负面影响．

The polycyclic aromatic hydrocarbons （PAHs） in the tide beach surface sediment samples of Hangzhou Bay were analyzed quantitatively, The total content of PAHs in sediments ranged from 45.78-849.93ng/g; and their spatial distribution in total presented that Hangzhou section of Qiantang River 〉 South bank of Hangzhou Bay 〉 North bank of Hangzhou Bay. The PAHs content distribution existed good linear relation with organic carbon （TOC） content, being relatively great influenced by human activity and hydrodynamic condition along the coastal zone. The indexes of source identification indicated that water dynamic conditions. The combustion sources of PAHs in the sample occupied relatively great proportion, showing the source characters of mixed pollution of oil combustion and wood cool combustion. The PAHs in the samples of surface sediments in this area still did not cause markedly the negative influence on organism,