High-Resolution Depositional Records of Polycyclic Aromatic Hydrocarbons in the Central Continental Shelf Mud of the East China Sea

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• 作者：Zhigang Guo ; Tian Lin ; Gan Zhang ; Zuosheng Yang ; Ming Fang
• 刊名：Environmental Science & Technology
• 出版年：2006
• 出版时间：September 1, 2006
• 年：2006
• 卷：40
• 期：17
• 页码：5304 - 5311
• 全文大小：401K
• 年卷期：v.40,no.17(September 1, 2006)
• ISSN：1520-5851

文摘

A well-placed ²¹⁰Pb-dated sediment core extracted fromthe distal mud in the central continental shelf of the EastChina Sea is used to reconstruct the high-resolutionatmospheric depositional record of polycyclic aromatichydrocarbons (PAHs), believed to be transported mainly fromChina in the past 200 years due to the East Asian Monsoon.Total PAHs (TPAHs), based on the 16 USEPA priorityPAHs, range from 27 in 1788 to 132 ng g^-1 in 2001. TPAHvariation in the core reflects energy usage changes andfollows closely the historical economic development inChina. PAHs in the core are dominantly pyrogenic in source,i.e., they are mainly from the incomplete combustion ofcoal and biomass burning. Several individual PAHs suggestthat contribution from incomplete petroleum combustionhas increased during recent years. Analysis of the 2 + 3 ringand the 5 + 6 ring PAHs and principle componentanalysis provide more evidence in the change in theenergy structure, especially after 1978 when China embarkedon the "Reform and Open" Policy, indicating thetransformation from an agricultural to an industrial economyof China. The historical profile of PAH distribution in thestudy area is obviously different from the United States andEurope due to their difference in energy structure andeconomic development stages.