台州湾海域表层沉积物中多环芳烃的浓度水平、富集规律及来源

Concentration, Accumulation and Sources of Polycyclic Aromatic Hydrocarbons in Surface Sediments in Taizhou Bay

研究了台州湾海域海水和表层沉积物中15种多环芳烃（PAHs）的浓度水平，评价了表层沉积物对多环芳烃的富集规律，探讨其可能来源。结果表明，表层沉积物中PAHs的浓度范围为85．4-167．6ng／g，平均值为138．62ng／g，总多环芳烃的最大值是椒江码头。表层沉积物中二环、三环、四环、五环和六环多环芳烃占总多环芳烃的百分含量平均值分别为7．8％，42．1％，33．3％，9．6％和7．2％，三环多环芳烃的含量最高；表层沉积物对多环芳烃的富集系数为532．7—1068．9，平均值为807．5，单组分菲的富集系数最高为122．7，最小的是苯并（a）芘为2．7；台州湾表层沉积物中的多环芳烃主要来源于燃煤污染，部分来源于石油烃类物质的直接污染。

The concentrations of 15 polycyclic aromatic hydrocarbons （PAHs） were determined in surface sediments in Taizhou Bay. The accumulation of PAHs and sources in surface sediments were analyzed. The results showed that： the concentrations of PAHs were in the range of 84.5 ng/g to 167.6 ng/g, and the average value was 138.62 ng/g in surface sediments. The concentrations of PAHs were more than others in Jiao-jiang-landing. The percentages of PAHs were, respectively, 7.8 % for 2- PAHs, 42.1% for 3- PAHs, 33.3 % for 4- PAHs, 9.6 % for 5- PAHs, 7.2 % for 6- PAHs. The accumulation coefficients of surface sediments for PAHs were from 532.7 to 1 068.9, and the average value was 807.5. The accumulation coefficient of the sediments for Phen was 122.7, and it was more than others. The accumulation coefficient of the sediments for BaP was 2.7, and it was less than others. The PAHs in surface sediments in Taizhou Bay were derived from petroleum pollution and combustion of fossil fuels.