ABSTRACT

The occurrence of 16 perfluorinated compounds (PFCs) in soil and sediment from the surroundings of a metal plating industrial park was investigated. The PFCs were quantified using isotope dilution ultra-high-performance liquid chromatography coupled with triple quadrupole mass spectrometry (UPLC-MS/MS). The ranges of the most commonly detected nine PFCs were 1.71–16.3 ng g⁻¹ dry weight (dw) and 4.72–58.7 ng g⁻¹ dw for soil and sediment, respectively. Higher frequencies of long-chain PFCs were observed in sediment than in soil, which is likely due to the higher organic carbon in the sediment than in soil. Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) were the two dominant compounds in soil and sediment. A significant decreasing trend was observed for PFOS as the distance from the metal plating plants increased. In contrast, the concentrations of PFOA were of the same order of magnitude at all sites in soil and sediment. Direct emission from metal plating plants could be the primary source of PFOS. No ecological risks of PFOS were found in the soil and sediment. However, more attention should be paid to the potential risks at the sites near the plating plants, where a slight increase was observed for PFOS and PFOA during 2016–2019.

摘要

研究了金属电镀工业园区周围土壤和沉积物中16种全氟化合物（PFC）的存在。使用同位素稀释超高效液相色谱结合三重四极杆质谱（UPLC-MS / MS）对PFC进行定量。最常见的九种PFC的范围为1.71–16.3 ng g ^-1干重（dw）和4.72–58.7 ng g ^-1dw分别表示土壤和沉积物。在沉积物中观察到的长链PFC的频率高于土壤中的频率，这很可能是由于沉积物中的有机碳含量高于土壤中的有机碳含量。全氟辛烷磺酸盐（PFOS）和全氟辛酸（PFOA）是土壤和沉积物中的两个主要化合物。随着与金属电镀厂的距离增加，全氟辛烷磺酸的下降趋势明显。相反，在土壤和沉积物的所有位置，PFOA的浓度都处于相同的数量级。金属电镀厂的直接排放可能是全氟辛烷磺酸的主要来源。在土壤和沉积物中未发现全氟辛烷磺酸的生态风险。但是，应更加关注电镀厂附近站点的潜在风险，在2016-2019年期间，全氟辛烷磺酸和全氟辛烷磺酸的含量略有增加。