Distribution and Sources of Polycyclic Aromatic Hydrocarbons in the Sediment Cores M2 from the Prydz Bay and Implications for Sedimentary Environment  

作　　者：Yang Dan Han Xibin Zhang Haisheng Zhang Yicheng Xu Xudan Zhang Huijuan 

机构地区：[1]Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China [2]Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China

出　　处：《Meteorological and Environmental Research》2019年第4期15-22,共8页气象与环境研究（英文版）

基　　金：Supported by Special Project for Comprehensive Survey and Assessment of the Environment in the Arctic and Antarctic(CHINARE2012-01-02,CHINARE2013-01-02,CHINARE2013-04-01);National Natural Science Foundation of China(41576186,41106046,41306202);Special Funds for Basic Scientific Research of Second Institute of Oceanography,State Oceanic Administration(JT1309)

摘　　要：In this study, the polycyclic aromatic hydrocarbons (PAHs) from the sediment cores M2 in the Pryza Bay of the Antarctica were quantitatively measured using GC-MS analysis, and it is found that the PAHs mainly included bicyclic naphthalene compounds, tricyclic phenanthrene and fluorine series (dibenzofuran and dibenzothiophene), and tetracyclic fluoranthene, pyrene and chrysene series. The results showed that the phenanthrene series with low molecular weight (tricyclic compounds) had a relatively higher content than the series with high molecular weight (tetracyclic compounds). The fluoranthene/(fluoranthene and pyrene) ratio of M2 varied from 0.46 to 0.54. Integrated with the content of 1,7-dimethylphenanthrene and terrigenous chrysene, it is inferred that PAHs in the sediments from the Pryzd Bay were originated from a mixed source of the products of petroleum, refined products and coal combustion, natural source and terrigenous higher plants. Complete methyl dibenzothiophene and dimethyldibenzothiophene series compounds were detected in the sediment cores, which are closely associated with a reducing environment. The ratio of dibenzothiophene to dibenzofuran was between 0.46 and 3.21, mostly greater than 0.7. Combined with the oxidation/reduction index (Pr/Ph) ranging from 0.45 to 0.61 for the sediment cores, it is indicated that these compounds were formed in a normal reducing environment. Geochemical parameters of PAHs such as TNR-1 (0.53-1.57), MPI (0.24-1.21), MDR (1.83-5.57), and MDBI (0.41-0.93), and maturity parameters such as C 29 /C 29 (+), C 31 22S/C 31 (22S+22R), C 32 22S/C 32 (22S+22R) and Ts/(Tm+Ts) were all indicative of high maturity. However, all the above parameters were significantly deviated from those of modern sediments and modern organisms, which undoubtedly shows the input of exogenous mature organic matter.In this study,the polycyclic aromatic hydrocarbons（PAHs）from the sediment cores M2 in the Pryza Bay of the Antarctica were quantitatively measured using GC-MS analysis,and it is found that the PAHs mainly included bicyclic naphthalene compounds,tricyclic phenanthrene and fluorine series（dibenzofuran and dibenzothiophene）,and tetracyclic fluoranthene,pyrene and chrysene series.The results showed that the phenanthrene series with low molecular weight（tricyclic compounds）had a relatively higher content than the series with high molecular weight（tetracyclic compounds）.The fluoranthene/（fluoranthene and pyrene）ratio of M2 varied from 0.46 to 0.54.Integrated with the content of 1,7-dimethylphenanthrene and terrigenous chrysene,it is inferred that PAHs in the sediments from the Pryzd Bay were originated from a mixed source of the products of petroleum,refined products and coal combustion,natural source and terrigenous higher plants.Complete methyl dibenzothiophene and dimethyldibenzothiophene series compounds were detected in the sediment cores,which are closely associated with a reducing environment.The ratio of dibenzothiophene to dibenzofuran was between 0.46 and 3.21,mostly greater than 0.7.Combined with the oxidation/reduction index（Pr/Ph）ranging from 0.45 to 0.61 for the sediment cores,it is indicated that these compounds were formed in a normal reducing environment.Geochemical parameters of PAHs such as TNR-1（0.53-1.57）,MPI（0.24-1.21）,MDR（1.83-5.57）,and MDBI（0.41-0.93）,and maturity parameters such as C29/C29（+）,C3122S/C31（22S+22R）,C3222S/C32（22S+22R）and Ts/（Tm+Ts）were all indicative of high maturity.However,all the above parameters were significantly deviated from those of modern sediments and modern organisms,which undoubtedly shows the input of exogenous mature organic matter.

关 键 词：ANTARCTICA Sediment core POLYCYCLIC AROMATIC hydrocarbons Material source SEDIMENTARY environment 

分 类 号：P[天文地球]