中文摘要：

以东海陆架水体中溶解态多环芳烃（PAHs）含量为基础，引入颗粒相-水相间的物质吸附系数（K oc ）计算悬浮颗粒物中 PAHs 有机碳归一化含量，结合陆架沉积物有机碳的年埋藏通量，估算东海陆架沉积物中 PAHs 沉积通量。结果显示：水体中溶解态的15种 PAHs 总含量为（701±392）ng/L，变化范围为412～1032 ng/L，PAHs 组成以3环为主。计算得到的悬浮颗粒物中15种 PAHs 有机碳归一化含量为20～28μg/g，对应的 PAHs 沉积通量为150～210 t/a。估算结果与实测沉积物中PAHs 含量和沉积通量结果基本吻合，表明实验室模拟实验获取的化合物 Koc 值适用于东海颗粒相-水相间的分配模型，证实悬浮颗粒物有机碳含量在控制 PAHs 两相分布过程中起着重要作用。同时，该方法为海洋沉积物中 PAHs 沉积通量的估算提供一种新途径。

英文摘要：

Eleven surface seawater samples collected over the East China Sea （ECS）were analyzed for polycyclic ar-omatic hydrocarbons （PAHs）in dissolved phase.An estimation of particulate-phase PAH fluxes was performed by using the organic carbon adsorption coefficient （K oc ）from an experimental data and total organic carbon burial flux in the ECS.The measured concentrations of total 15 dissolved-phase PAHs in the water samples ranged from 412 to 1 032 ng/L,with the average value of （701±392）ng/L,which were predominated by the three ring PAHs.It is estimated that the concentrations of 15 PAHs in particulate phase were from 20 to 28 μg/g and the total deposition＆amp;nbsp;flux of the ECS was from 150 to 210 t/a.The estimated results are consistent with measured concentrations and fluxes of PAHs in the sediments,suggesting feasibility of Koc values-based method for rapid estimation of deposi-tion fluxes of PAHs in this area.The design and implementation of the method is a new quantitative way attempt to estimate PAH fluxes in marine sediment.