Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, PR China; Yangtze Institute for Conservation and Development, Nanjing 210098, PR China.
Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, PR China.
Sci Total Environ. 2023 Jan 20;857(Pt 2):159452. doi: 10.1016/j.scitotenv.2022.159452. Epub 2022 Oct 18.
The present study investigated the temporal and spatial distributions, partition behaviors, sources, and risks of 14 perfluoroalkyl acids (PFAAs) in the aquatic environment of a fluorine industry-impacted region. The total concentrations of 14 PFAAs (ΣPFAAs) were 118.10-2235.4 ng/L, 40.00-2316.1 ng/g dw, and 6.90-180.5 ng/g dw in dissolved, suspended particle matter (SPM), and sedimentary phases, respectively. The predominant pollutants in the dissolved and SPM phases were perfluoroalkyl carboxylic acids (PFCAs) with carbon chain lengths <9, whereas C13 and C14 PFCAs accounted for a large proportion in the sedimentary phase. The dry season exhibited the highest concentration of ΣPFAAs in the dissolved phase (500.9 ± 350.2 ng/L), while the wet season showed the highest concentrations of ΣPFAAs in the SPM and sedimentary phases (591.6 ± 469.1 ng/g dw and 59.7 ± 35.5 ng/g dw, respectively). Significantly higher concentrations of PFAAs have been found in sewage plant and industrial areas. The concentration of PFAAs in the Xupu water source area (XPS) was slightly higher than that in other water source areas of the Yangtze River, which were either not affected or were less affected by the fluorine industry. The log K (distribution coefficient between SPM and water), log K (distribution coefficient between sediment and water), and log K (the organic carbon normalized distribution coefficient) of PFAAs showed significant differences between the wet season and dry season, which may also be affected by carbon chain length. Source identification results showed that industries, wastewater discharge, and nonpoint sources were the main sources of PFAAs in this region. The ecological risk posed by long-chain PFAAs in aquatic organisms cannot be ignored, especially in areas with intensive industrial and agricultural activities. Health risks may exist for local toddlers with long-term exposure to perfluorooctanoic acid (PFOA) through drinking water intake and dermal contact.
本研究调查了氟工业影响地区水体中 14 种全氟烷基酸（PFAAs）的时空分布、分配行为、来源和风险。14 种 PFAAs（ΣPFAAs）的总浓度分别为溶解相 118.10-2235.4ng/L、悬浮颗粒物（SPM）相 40.00-2316.1ng/g 干重和沉积物相 6.90-180.5ng/g 干重。溶解相和 SPM 相中主要污染物为碳链长度<9 的全氟烷基羧酸（PFCAs），而 C13 和 C14 PFCAs 在沉积物相中占很大比例。干季溶解相ΣPFAAs 浓度最高（500.9±350.2ng/L），而湿季 SPM 和沉积物相ΣPFAAs 浓度最高（分别为 591.6±469.1ng/g 干重和 59.7±35.5ng/g 干重）。污水处理厂和工业区的 PFAAs 浓度明显较高。在 Xupu 水源区（XPS）的 PFAAs 浓度略高于长江其他水源区，这些水源区要么不受氟工业影响，要么受氟工业影响较小。PFAAs 的 log K（SPM 与水之间的分配系数）、log K（沉积物与水之间的分配系数）和 log K（有机碳归一化分配系数）在干湿两季之间存在显著差异，这也可能受到碳链长度的影响。来源识别结果表明，该地区的 PFAAs 主要来源于工业、污水排放和非点源。水生生物中长链 PFAAs 带来的生态风险不容忽视，特别是在工农业活动密集的地区。当地幼儿通过饮水和皮肤接触长期接触全氟辛酸（PFOA）可能存在健康风险。
Zotero 插件