Environment Research Institute, Shandong University, Qingdao 266237, China; Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; College of Environmental Sciences and Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China.
College of Environmental Sciences and Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China.
Mar Pollut Bull. 2024 Feb;199:115966. doi: 10.1016/j.marpolbul.2023.115966. Epub 2023 Dec 27.
Present study focused on per- and polyfluoroalkyl substances (PFASs) occurrence in dry and wet seasons in the middle and lower Yangtze River (YZR) and changing temporal trends after years of control. Results revealed that perfluorooctanoic acid (PFOA) was 75 % of total PFAS concentrations (∑PFASs). ∑PFASs were ranged 0.20-28.49 ng/L and 1.17-112.84 μg/kg in water and sediment. The logK of perfluoroalkyl carboxylic acids was positive with the carbon chain length (p < 0.05, r = 0.78). A meta-analysis of results from 16 peer-reviewed publications about PFASs in the YZR showed that fluorochemical industries strongly influenced the high PFAS levels in the detected scenes. PFOA was still the primary pollutant. Individual PFAS in the lower reach was higher than those in the middle reach. The mass loading of PFASs imported into the sea was 10.80 t/y. This study will help develop effective approaches for controlling emerging pollutants in the YZR.
本研究集中于长江中下游干湿季节中全氟和多氟烷基物质 (PFASs) 的出现情况，以及经过多年治理后其时间变化趋势。结果表明，全氟辛酸 (PFOA) 占 PFASs 总量的 75%。水中和沉积物中∑PFASs 的浓度范围分别为 0.20-28.49ng/L 和 1.17-112.84μg/kg。随着碳链长度的增加，全氟烷基羧酸的 logK 值呈正相关（p<0.05，r=0.78）。对长江中下游 16 篇关于 PFASs 的同行评议文献的荟萃分析表明，氟化学工业对所检测场景中高浓度 PFASs 的形成有重要影响。PFOA 仍然是主要污染物。下游各单体 PFAS 的含量高于中游。输入海洋的 PFASs 质量负荷为 10.80 吨/年。本研究将有助于开发长江中下游新兴污染物的有效控制方法。
