北京大学学报自然科学版 ›› 2022, Vol. 58 ›› Issue (3): 575-586.DOI: 10.13209/j.0479-8023.2022.025

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黄河下游水体中全氟及多氟烷基化合物的分布特征

吕明1, 朱有长1, 潘保柱2, 许楠1,†    

  1. 1. 北京大学深圳研究生院环境与能源学院, 深圳市重金属污染控制与资源化重点实验室, 深圳 518055 2. 西安理工大学西北旱区生态水利国家重点实验室, 西安 710048
  • 收稿日期:2021-05-13 修回日期:2021-06-12 出版日期:2022-05-20 发布日期:2022-05-20
  • 通讯作者: 许楠, E-mail: xunan(at)pkusz.edu.cn
  • 基金资助:
    国家自然科学基金(51939009, 51879003, 51579003)资助 

Distribution of Per- and Polyfluoroalkyl Substances (PFASs) in Lower Reach of Yellow River, China

LÜ Ming1, ZHU Youchang1, PAN Baozhu2, XU Nan1,†   

  1. 1. Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055

    2. State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048

  • Received:2021-05-13 Revised:2021-06-12 Online:2022-05-20 Published:2022-05-20
  • Contact: XU Nan, E-mail: xunan(at)pkusz.edu.cn

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摘要：

系统地研究黄河下游春秋两季水样和沉积物中50种PFASs的分布特征和生态风险。结果表明, PFASs在春秋两季水样中检出的总浓度范围分别为29.83~54.44和16.18~57.81 ng/L, 春秋两季沉积物中PFASs的含量范围分别为18.12~36.16和13.01~36.78 ng/g。在春秋两季占比最高的3类物质在水相和沉积物中均为全氟烷基羧酸(PFCAs)、全氟烷基磺酸(PFSAs)和n:2氟调聚磺酸(n:2 FTSs)。作为新型PFASs, n:2 FTSs在水相和沉积物中均有较高的检出水平。全氟辛酸(PFOA)在水相和沉积物中的主要替代物为短链PFCAs, 六氟环氧丙烷二聚酸(HFPO-DA)则在沉积物中对PFOA有更高的替代趋势; 全氟辛烷磺酸(PFOS)在水相和沉积物中的主要替代物为6:2 FTS。风险熵值法分析结果表明, 水体中各PFASs目标物均未达到环境生态风险水平。 

关键词: PFASs, 黄河, 水体, 沉积物, 生态风险

Abstract:

Fifty PFASs were measured in water and sediment samples collected from the lower reach of Yellow River in spring and autumn to understand their distribution and ecological risk. The results indicated that the total concentrations of PFASs in water ranged from 29.83–54.44 ng/L in spring and 16.18–57.81 ng/L in autumn, while the total contents in sediment ranged from 18.12–36.16 ng/g in spring and 13.01–36.78 ng/g in autumn. Perfluoroalkyl carboxylic acids (PFCAs), perfluoroalkane sulfonic acids (PFSAs) and n:2 fluorotelomer sulfonic acids (n:2 FTSs) were the three dominant types of PFASs in both seasons, and n:2 FTSs, as emerging PFASs, were detected with high concentrations in both water and sediment. Short-chain PFCAs were the main substitutes of perfluorooctanoic acid (PFOA) in water and sediment, while hexafluoropropylene oxide dimer acid (HFPO-DA) presented a higher substitution trend to PFOA in sediment; the main substitute of perfluorooctane sulfonic acid (PFOS) in water and sediment was 6:2 FTS. The results of risk quotient analysis showed that the PFASs target compounds in water posed no ecological risks to aquatic environment. 

Key words:  PFASs, Yellow River, water, sediment, ecological risk

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