Cao Yuanxin, Cao Xuezhi, Wang Hui, Wan Yi, Wang Shiliang
School of Geography and Tourism, Qufu Normal University, Rizhao, 276826, China.
Environ Monit Assess. 2015 Oct;187(10):611. doi: 10.1007/s10661-015-4831-9. Epub 2015 Sep 4.
In this study, the distribution and partitioning of nine perfluorinated compounds (PFCs) in the water and sediment of Nansi Lake were systematically investigated. The total concentration of PFCs was in the range of 38.4-91.4 ng/L in the water and 0.47-1.81 ng/g in the sediment. The concentration of perfluorooctanoic acid (PFOA) was the highest in all the homologues in the water and was in the range of 34.9-84.6 ng/L. However, perfluorooctane sulfonate (PFOS), PFOA, and perfluoroundecanoic acid (PFUnDA) were the predominant PFCs in the sediment, and their levels were similar. The levels of PFOA, PFHpA, PFOS, PFNA, and the total PFCs in the water were relatively higher in the upper region than those in the lower region of Nansi Lake. In the sediment, the levels of PFOA, PFOS, and PFUnDA showed the similar distribution tendency. Industrial wastewater discharged from the cities around Nansi Lake was the main sources of PFCs. The partitioning coefficients (K d ) of PFOA, PFNA, PFDA, and PFOS were in the range of 0.29-0.87, 1.43-2.18, 2.08-3.15, and 2.20-2.80, respectively. Therefore, the log K d of PFDA and PFOS was apparently high as compared to two other compounds. The organic matter content of the sediment had no effect on the partitioning of PFCs between sediment and water in Nansi Lake.
本研究系统调查了南四湖水体和沉积物中9种全氟化合物（PFCs）的分布与分配情况。南四湖水体中PFCs的总浓度范围为38.4 - 91.4 ng/L，沉积物中为0.47 - 1.81 ng/g。水中全氟辛酸（PFOA）在所有同系物中的浓度最高，范围为34.9 - 84.6 ng/L。然而，全氟辛烷磺酸（PFOS）、PFOA和全氟十一酸（PFUnDA）是沉积物中的主要PFCs，且它们的含量相近。南四湖水体中PFOA、全氟庚酸（PFHpA）、PFOS、全氟萘酸（PFNA）及PFCs总量在上游区域相对高于下游区域。沉积物中，PFOA、PFOS和PFUnDA呈现出相似的分布趋势。南四湖周边城市排放的工业废水是PFCs的主要来源。PFOA、PFNA、全氟癸酸（PFDA）和PFOS的分配系数（Kd）分别在0.29 - 0.87、1.43 - 2.18、2.08 - 3.15和2.20 - 2.80范围内。因此，与其他两种化合物相比，PFDA和PFOS的log Kd明显较高。沉积物中的有机质含量对南四湖沉积物与水体间PFCs的分配没有影响。
