中国东部海区柱状沉积物多环芳烃埋藏通量和埋藏效率研究  

Study on burial fluxes and burial rates of polycyclic aromatic hydrocarbons in sediments from the East China sea area

作　　者：林田[1] 郭志刚[2] 胡利民[3] 

机构地区：[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550081 [2]复旦大学环境科学与工程系,上海200433 [3]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

出　　处：《地球化学》2016年第4期419-424,共6页Geochimica

基　　金：国家自然科学基金青年科学基金(41103046);"全球变化与海气相互作用"专项国际合作项目(GASI-GEOGE-03);海洋公益性行业科研专项经费项目(201205001)

摘　　要：沉积物是多环芳烃(PAHs)重要的蓄积库。围绕渤海、黄海和东海陆架泥质区柱状沉积物中多环芳烃的研究发现:由于多环芳烃含量和沉积物干样密度在不同海区沉积物中的差异较小,因此,沉积速率是决定其埋藏通量的重要因素。本研究中提出的基于过剩^(210)Pb埋藏效率指数,可以较大程度上实现不同区域多环芳烃污染水平的横向对比。与埋藏通量比较,埋藏效率指数可以更客观地反映研究区域中多环芳烃污染输入强度和沉积物吸附能力等共同作用。Sediments often serve as a major sink for polycyclic aromatic hydrocarbons （PAHs）. This study measured the concentrations and fluxes of PAHs in sediment cores in the East China sea area （including the Bohai Sea, the Yellow Sea and the East China Sea）. Differences in the PAH concentrations and sediment dry density were small among the collected marine sediment samples on a larger spatial scale. The results showed that the deposition rate was an important factor for burial flux. In this study, the burial rates of sedimentary PAHs based on 210pb excess were proposed to evaluate the spatial differences of sedimentary PAHs, which expected to exclude the interference from different deposition rates. Compared with the burial flux, the index of burial rate could be more objective to reflect the input intensity of PAHs and the adsorption capacity of sediments.

关 键 词：多环芳烃 过剩 210Pb 沉积柱 埋藏通量 东部海区 

分 类 号：P593[天文地球—地球化学] P736.2[天文地球—地质学]