东海表层水体中的多环芳烃及其沉积通量估算
Polycyclic aromatic hydrocarbons in the surface seawater of the East China Sea and application in depositional fluxes calculation
查看参考文献37篇
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文摘
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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_∝值适用于东海颗粒相一水相间的分配模型,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。 |
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其他语种文摘
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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. |
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来源
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海洋学报
,2014,36(8):12-18 【核心库】
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关键词
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多环芳烃
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水体
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颗粒相-水相分配
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沉积通量
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东海
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地址
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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
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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
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复旦大学环境科学与工程系, 上海, 200433
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-4193 |
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学科
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海洋学 |
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基金
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国家自然科学基金青年科学基金项目
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国家自然科学基金面上项目
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中国博士后科学基金
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文献收藏号
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CSCD:5197121
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