北部湾表层河流水体和沉积物中全氟烷基物质的赋存及分布。
Occurrence and distribution of perfluoroalkyl substances in surface riverine and coastal sediments from the Beibu Gulf, south China.
机构信息
Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China; School of Marine Sciences, Guangxi University, Nanning, 530004, China.
Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China; School of Marine Sciences, Guangxi University, Nanning, 530004, China.
出版信息
Mar Pollut Bull. 2020 Jan;150:110706. doi: 10.1016/j.marpolbul.2019.110706. Epub 2019 Nov 18.
There is limited understanding on the occurrence of PFASs in coastal sediment, especially in less-developed coastal areas. Here, we collected surface sediment samples from the Beibu Gulf to investigate the occurrence, spatial distribution and environmental risks of 18 PFASs. The concentrations of the total PFASs (ΣPFASs) ranged from 56.2 to 586.3 pg/g dry weight (dw), with a mean value of 172.5 pg/g dw. ΣPFASs concentrations were significantly lower in riverine than in coastal sediments. Additionally, there was a decreasing trend in ΣPFASs concentrations from the west (Fangchenggang) to the east (Beihai) of the Beibu Gulf. Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) were the predominant PFASs, with their concentrations in the range of 4.8-249.0 pg/g dw and not detected (n.d)-224.8 pg/g dw, respectively. On a global scale, PFOS and PFOA concentrations were at low levels in the sediment of the Beibu Gulf, and they posed negligible environmental risks.
人们对沿海沉积物中持久性有机污染物的发生情况了解有限，特别是在欠发达的沿海地区。本研究从北部湾采集了表层沉积物样品，以调查 18 种全氟化合物（PFASs）的存在情况、空间分布和环境风险。全氟化合物（ΣPFASs）的浓度范围为 56.2 至 586.3 pg/g 干重（dw），平均值为 172.5 pg/g dw。与沿海沉积物相比，河流沉积物中 ΣPFASs 的浓度明显较低。此外，从北部湾的西部（防城港）到东部（北海），ΣPFASs 的浓度呈下降趋势。全氟辛酸（PFOA）和全氟辛烷磺酸（PFOS）是主要的 PFASs，浓度范围分别为 4.8-249.0 pg/g dw 和未检出（n.d）-224.8 pg/g dw。在全球范围内，北部湾沉积物中 PFOS 和 PFOA 的浓度处于较低水平，它们造成的环境风险可以忽略不计。
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