东海表层水体中的多环芳烃及其沉积通量估算

林田; 胡利民; 郭志刚

doi:10.3969/j.issn.0253-4193.2014.08.002

东海表层水体中的多环芳烃及其沉积通量估算

doi: 10.3969/j.issn.0253-4193.2014.08.002

1.
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, 贵州贵阳 550002;复旦大学环境科学与工程系, 上海 200433
2.
国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室, 山东青岛 266061
3.
复旦大学环境科学与工程系, 上海 200433

基金项目: 国家自然科学基金青年科学基金项目（41103046）；国家自然科学基金面上项目（41376051）；中国博士后科学基金特别资助项目（2012T50596）。

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出版历程
- 收稿日期: 2013-10-11
- 修回日期: 2013-11-26

Polycyclic aromatic hydrocarbons in the surface seawater of the East China Sea and application in depositional fluxes calculation

1.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
2.
Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
3.
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China

摘要

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412~1 032 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20~28 μg/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K_oc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。
- 多环芳烃 /
- 水体 /
- 颗粒相-水相分配 /
- 沉积通量 /
- 东海
Abstract: Eleven surface seawater samples collected over the East China Sea (ECS) were analyzed for polycyclic aromatic 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 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 deposition 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.
- PAHs /
- water /
- distribution between the dissolved and the particulate phase /
- depositional flux /
- East China Sea

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