College of Science, Huazhong Agricultural University, Wuhan, 430070, China.
Hubei Environmental Monitoring Central Station, Wuhan, 430072, China.
Environ Monit Assess. 2018 Jan 7;190(2):66. doi: 10.1007/s10661-017-6439-8.
The occurrence of eight perfluorinated compounds (PFCs) in the surface sediments from 10 sampling sites spread across the Danjiangkou Reservoir was investigated by isotope dilution ultra-high-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) after solid-phase extraction (SPE). All the sediments from the 10 sites contained detectable levels of PFCs. The total concentration of the target PFCs in each sediment sample (C) ranged from 0.270 to 0.395 ng g of dry weight, and the mean value of C was 0.324 ± 0.045 ng g of dry weight for the whole reservoir. For each perfluorinated compound in one sediment, perfluorooctane sulfonate (PFOS) or perfluoro-n-butanoic acid (PFBA) consistently had a higher concentration than the other six PFCs, while perfluoro-n-octanoic acid (PFOA) was always undetectable. In terms of spatial distribution, the total and individual concentrations of PFCs in sediment from downstream sites of the Danjiangkou Reservoir were higher than those from upstream sites. Factor analysis revealed that PFCs in the sediment samples originated from electroplating and anti-fog agents in industry, food/pharmaceutical packaging and the water/oil repellent paper coating, and the deposition process. The quotient method was utilized to assess the ecological risk of PFCs in the sediments of the Danjiangkou Reservoir, which showed that the concentrations of PFCs were not considered a risk. In this study, detailed information on the concentration level and distribution of PFCs in the sediments of the Danjiangkou Reservoir, which is the source of water for the Middle Route Project of the South-to-North Water Transfer Scheme in China, was reported and analyzed for the first time. These results can provide valuable information for water resource management and pollution control in the Danjiangkou Reservoir.
采用固相萃取（SPE）-同位素稀释超高效液相色谱-串联质谱法（UPLC-MS/MS），对丹江口水库 10 个采样点的表层沉积物中 8 种全氟化合物（PFCs）的含量进行了调查。所有 10 个采样点的沉积物均检测到 PFCs 的存在。每个沉积物样品中目标 PFCs 的总浓度（C）范围为 0.270-0.395ng/g 干重，整个水库的 C 平均值为 0.324±0.045ng/g 干重。对于沉积物中每一种全氟化合物，全氟辛烷磺酸（PFOS）或全氟丁酸（PFBA）的浓度始终高于其他六种 PFCs，而全氟辛酸（PFOA）则始终未检出。就空间分布而言，丹江口水库下游采样点的沉积物中 PFCs 的总浓度和单个浓度均高于上游采样点。因子分析表明，沉积物中 PFCs 的来源包括工业中的电镀和防雾剂、食品/医药包装和防水/防油纸涂层以及沉积过程。采用商值法评估了丹江口水库沉积物中 PFCs 的生态风险，结果表明 PFCs 的浓度未被视为风险。本研究首次详细报道和分析了南水北调中线工程水源地丹江口水库沉积物中 PFCs 的浓度水平和分布情况。这些结果可为丹江口水库水资源管理和污染控制提供有价值的信息。
