生态环境学报2012，Vol.21Issue(5)：890-896,7.
浙江三门湾柱样沉积中长链烯酮、正构烷烃和多环芳烃组成、分布特征及对厄尔尼诺/拉尼娜事件的追踪
The composition and distribution characteristics of the long-chain ketene,n-alkanes and Polycyclic Aromatic Hydrocarbon ( PAH )in the sediments of core in the Sanmen Bay of Zhejiang, and the tracking the Ni(n)o/La Ni(n)a events
摘要
Abstract
Gas chromatographic (GC) measurements were performed to exploring the compositions and sources of the long-chain ketene, n-alkanes and polycyclic aromatic hydrocarbons (PAHs) in the sediment of Core ICO obtained from the Sanmen Bay, Zhejiang. Furthermore, the relationship between some organic geochemical indexes and the ENSO dynamics were explored. According to the GC map of N-alkanes, the carbon numbers distributed as a bimodal type, ranging between C14 and C3S. The main peak of the group of smaller carbon numbers is C17～C19; and that of the group of larger carbon numbers is C27～C31. Such carbon numbers distribution of n-alkanes suggested that the alkanes of both terrestrial higher plants and the marine phycomycetes coexisted in the sediment of Sanmen Bay. According to the phenanthrene/anthracene ratio, the iluoranthene/pyrene ratio, the total PAHs with 2~3 rings and the total PAHs with > 4 rings, the PAH in the Sanmen Bay sediment mainly originated from incomplete combustion of fossil fuels and oil spill in shipping accidents. On the basis of accurate 2I0Pb determination, between 1822 and 2005 A.D., the total PAHs, the contents of long-chain n-alkanes and pyrylo, the alkanes C15～C19 and the carbon preference index increased during the El Nino years, especially in end years of the El Nino events, which indicated the increase in both terrestrial organism input and marine phycomycetes. While during the La Nina years, the total PAHs, the content of long-chain n-alkanes, die alkanes C15～C19 and ∑C21～∑C22 were reduced, suggesting the decrease in marine phycomycetes.关键词
正构烷烃、多环芳烃/三门湾、厄尔尼诺事件、拉尼娜事件Key words
n-alkanes/ Polycyclic Aromatic Hydrocarbon/ Sanmen Bay/ El Nino/ La Nifia分类
海洋科学引用本文复制引用
陈荣华,赵庆英,王炳泉,沈远,王小华,叶新荣,卢冰..浙江三门湾柱样沉积中长链烯酮、正构烷烃和多环芳烃组成、分布特征及对厄尔尼诺/拉尼娜事件的追踪[J].生态环境学报,2012,21(5):890-896,7.基金项目
国家自然科学基金项目(40876063) （40876063）
浙江省自然科学基金项目(Y5090364) （Y5090364）
