Spatial distribution and source apportionment of PAHs in marine surface sediments of Prydz Bay, East Antarctica
Spatial distribution and source apportionment of PAHs in marine surface sediments of Prydz Bay, East Antarctica
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东南极普里兹湾海洋表层沉积物中多环芳烃的空间分布及来源解析
DOI：
10.1016/j.envpol.2016.05.084
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发表时间：
2016
影响因子：
8.9
通讯作者：
Cai Minghong
中科院分区：
文献类型：
--
作者：
Xue Rui;Chen Ling;Lu Zhibo;Wang Juan;Yang Haizhen;Zhang Jie;Cai Minghong
本文报道了东南极普里兹湾海洋沉积物中多环芳烃（PAHs）的含量。PAH总浓度范围为12.95 - 30.93 ng/g，平均值为17.99 ± 5.57 ng/g。二环和三环的多环芳烃是最丰富的化合物，发现在大多数的采样站的Preniz湾。长距离大气传输被认为在确定多环芳烃的空间分布在这里采样的沉积物中发挥了重要作用。然而，运输的洋流和冰川融化的释放也被发现影响多环芳烃在东南极洲沉积物中的分布。沉积物中多环芳烃的垂直迁移随深度的增加呈下降趋势，弗拉姆和Four Ladies河岸的相对浅水区（<500 m）的浓度分别高于Amery盆地和相关河流的中等深度（500-1000 m）和深水区（>1000 m）。Pearson相关分析表明，多环芳烃与沉积物粒度相关性较差，与总有机碳正相关，说明多环芳烃在迁移过程中经历了复杂的过程。定性和定量分析的结果表明，在这里采样的多环芳烃主要来自生物质燃烧，交通排放和岩石源的混合。
This paper reports the concentrations of polycyclic aromatic hydrocarbons (PAHs) in marine sediments sampled from Prydz Bay, East Antarctica. Total PAH concentrations ranged from 12.95 to 30.93 ng/g, with a mean of 17.99 ± 5.57 ng/g. Two- and three-ring PAHs were the most abundant compounds found at the majority of the sampling stations of Prydz Bay. Long-range atmospheric transportation was found to play an important role in determining the spatial distribution of PAHs in the sediments sampled here. However, transport by ocean currents and release from melting glaciers were also found to influence PAH distributions in the sediments of East Antarctica. The vertical migration of PAHs in sediments showed a decreasing trend with depth, with higher concentrations in the relatively shallow-water regions (<500 m) found on the Fram and Four Ladies banks compared with those of the intermediate-depth (500–1000 m) and deep-water regions (>1000 m) of the Amery Basin and associated Canyons, respectively. A Pearson correlation analysis between PAH concentrations and sediment parameters demonstrated that PAHs has poor correlations with grain size, but has positive correlation with total organic carbon, indicated complex processing during transfer to remote environments. The results of qualitative and quantitative analyses indicate that the PAHs sampled here were derived mainly from a mixture of biomass combustion, traffic emissions, and petrogenic sources.