College of Environmental Science and Engineering, Dalian Maritime University, Linghai Road 1, Dalian 116026, PR China.
College of Environmental Science and Engineering, Dalian Maritime University, Linghai Road 1, Dalian 116026, PR China.
Mar Pollut Bull. 2018 Feb;127:285-288. doi: 10.1016/j.marpolbul.2017.12.020. Epub 2017 Dec 21.
In the present study, the spatial distributions and vertical variations of PFASs in the sediments of the Dalian Bay were investigated. The total concentrations of PFASs (∑PFASs) in surface sediments of Dalian Bay ranged from 1.49 to 2.66ngg dw. The predominant PFASs in surface sediments were PFOA, PFBS and PFBA with the concentration ranges of 0.50 to 0.95, 0.21 to 0.94, and 0.035 to 0.32ngg dw, respectively. For the two sediment cores, ∑PFASs ranged from 1.20 to 2.00 and from 1.37 to 2.06ngg dw, respectively. There was a maximum ∑PFASs concentration value near the surface. In general, ∑PFASs gradually decreased with increasing sampling depth after reaching the maximum. PFOA, PFBS and PFBA were also the predominant PFASs in the two sediment cores. It is recommended that the monitoring and risk assessment of short-chain PFAS should be taken into consideration, and further researches are needed to understand the transportation and fate of these chemicals in the aquatic environment.
在本研究中，调查了大连湾沉积物中 PFASs 的空间分布和垂直变化。大连湾表层沉积物中 PFASs 的总浓度（∑PFASs）范围为 1.49 至 2.66ngg dw。表层沉积物中主要的 PFASs 是 PFOA、PFBS 和 PFBA，浓度范围分别为 0.50 至 0.95、0.21 至 0.94 和 0.035 至 0.32ngg dw。对于两个沉积物岩芯，∑PFASs 分别为 1.20 至 2.00 和 1.37 至 2.06ngg dw。在表层附近有一个∑PFASs 的最大值。一般来说，∑PFASs 在达到最大值后，随着采样深度的增加逐渐减少。PFOA、PFBS 和 PFBA 也是两个沉积物岩芯中主要的 PFASs。建议对短链 PFAS 的监测和风险评估加以考虑，并需要进一步研究以了解这些化学物质在水环 境中的迁移和归宿。
