Molecular Tracers of Saturated and Polycyclic Aromatic Hydrocarbon Inputs into Central Park Lake, New York City

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• 作者：Beizhan Yan ; Teofilo A. Abrajano ; Richard F. Bopp ; Damon A. Chaky ; Lucille A. Benedict ; and Steven N. Chillrud
• 刊名：Environmental Science & Technology
• 出版年：2005
• 出版时间：September 15, 2005
• 年：2005
• 卷：39
• 期：18
• 页码：7012 - 7019
• 全文大小：305K
• 年卷期：v.39,no.18(September 15, 2005)
• ISSN：1520-5851

文摘

Saturated hydrocarbons (SH) and polycyclic aromatichydrocarbons (PAHs) have been quantified in a sedimentcore obtained from Central Park Lake, New York City.Radionuclides ²¹⁰Pb and ¹³⁷Cs were used to assign approximatedates to each individual section in the core. The datingprofile based on ²¹⁰Pb matches very well with the timeconstraints provided by ¹³⁷Cs. Radionuclide-deriveddepositional dates are consistent with temporal informationfrom the petroleum-indicator ratio U/R [the ratio ofunresolved complex mixture (UCM) to saturated hydrocarbonsin the aliphatic fraction] and the history of fuel use inthe NYC area. Ratios of 1,7-dimethylphenanthrane (DMP)to 1,7-DMP plus 2,6-DMP [1,7/(1,7 + 2,6)-DMP], retene toretene plus chrysene [Ret/(Ret + Chy)], and fluoranthene tofluoranthene plus pyrene [Fl/(Fl + Py)] provide additionalsource discrimination throughout the core. Results show thatthe ratio U/R is sensitive to petroleum inputs andRet/(Ret + Chy) is responsive to contributions fromsoftwood combustion, whereas both Fl/(Fl + Py) and 1,7/(1,7 + 2,6)-DMP can be used to discriminate among wood,coal, and petroleum combustion sources. Combined useof these ratios suggests that in New York City, woodcombustion dominated 100 years ago, with a shift to coalcombustion occurring from the 1900s to the 1950s.Petroleum use began around the 1920s and has dominatedsince the 1940s.