Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang 524088, China.
Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361102, China.
Int J Environ Res Public Health. 2018 Apr 12;15(4):734. doi: 10.3390/ijerph15040734.
In the fourth Chinese National Arctic Research Expedition (from July to September, 2010), 14 surface sediment samples were collected from the Bering Sea, Chukchi Sea, and Canadian Basin to examine the spatial distributions, potential sources, as well as ecological and health risk assessment of polycyclic aromatic hydrocarbons (PAHs). The ∑PAH (refers to the sum of 16 priority PAHs) concentration range from 27.66 ng/g to 167.48 ng/g (dry weight, d.w.). Additionally, the concentrations of ∑PAH were highest in the margin edges of the Canadian Basin, which may originate from coal combustion with an accumulation of Canadian point sources and river runoff due to the surface ocean currents. The lowest levels occurred in the northern of Canadian Basin, and the levels of ∑PAH in the Chukchi Sea were slightly higher than those in the Being Sea. Three isomer ratios of PAHs (Phenanthrene/Anthracene, BaA/(BaA+Chy), and LMW/HMW) were used to investigate the potential sources of PAHs, which showed the main source of combustion combined with weaker petroleum contribution. Compared with four sediment quality guidelines, the concentrations of PAH are much lower, indicating a low potential ecological risk. All TEQ also showed a low risk to human health. Our study revealed the important role of the ocean current on the redistribution of PAHs in the Arctic.
在中国第四次北极科学考察中（2010 年 7 月至 9 月），从白令海、楚科奇海和加拿大海盆采集了 14 个表层沉积物样品，以研究多环芳烃（PAHs）的空间分布、潜在来源以及生态和健康风险评估。∑PAH（指 16 种优先 PAHs 的总和）浓度范围为 27.66ng/g 至 167.48ng/g（干重，d.w.）。此外，∑PAH 的浓度在加拿大海盆边缘最高，可能源于煤炭燃烧，加上加拿大点源的积累和地表海流引起的河流径流。在加拿大海盆北部浓度最低，楚科奇海的∑PAH 水平略高于白令海。三种多环芳烃异构体比值（菲/蒽、BaA/（BaA+Chy）和低分子量/高分子量）用于研究 PAHs 的潜在来源，结果表明主要来源是燃烧与较弱的石油贡献相结合。与四个沉积物质量准则相比，PAH 的浓度要低得多，表明其具有较低的潜在生态风险。所有 TEQ 也显示出对人类健康的低风险。我们的研究揭示了海流在北极地区 PAHs 再分配中的重要作用。
