Occurrence and potential ecological risk of per- and polyfluoroalkyl substances in mangrove sediments in Zhanjiang, China

被引：0
|
作者：
Liu, Fen [1 ]
Liu, SiMan [1 ]
Li, HuiZhen [1 ]
You, Jing [1 ]
机构：
[1] School of Environment and Climate, Jinan University, Guangdong Key Laboratory of Environmental Pollution and Health, Guangzhou,510632, China
来源：
Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica | 2024年 / 54卷 / 10期
关键词：
Per- and polyfluoroalkyl substances (PFASs) have become a significant global concern owing to their persistence; bioaccumulation; and toxicity. These substances are widely distributed in various environmental media; threatening ecosystem health. Mangroves; which play a crucial role in coastal protection; are also repositories for inland-originated contaminants. Understanding the contamination levels and risks associated with emerging pollutants like PFASs in mangrove ecosystems is critical for their conservation and management. In this study; we focused on the Zhanjiang mangrove forests; the largest mangrove area in Southern China; to explore the presence; spatial distribution; possible origins; and potential ecological risks of PFASs in sediments. The findings revealed that the total PFAS concentrations in these sediments fluctuated from 0.29 to 0.79 ng/g dry wt; indicating moderate contamination levels compared with nearby sediments. Notably; perfluorinated carboxylic acid concentrations were significantly higher than those of perfluorinated sulfonic acids; with short-chain PFASs prevailing over long-chain counterparts. Among these; perfluorobutyric acid (PFBA) was the most prevalent; followed by perfluorooctanoic acid (PFOA) and perfluoropentanoic acid (PFPeA). Spatial analysis showed marginally increased concentrations in sediments from urban (Jinsha Bay); tourist (Techeng Island); and agricultural (Gaoqiao) areas compared with those from the aquaculture area (Huguang Town). Correlation and principal component analysis were used to assess potential sources of PFASs in the mangrove sediments. Furthermore; the risk quotients for (PFOA) and perfluorooctane sulfonate (PFOS) within the sediments were less than 1; indicating low ecological risk. The outcomes of this research offer valuable insights into the PFAS contamination status in the Zhanjiang mangroves. © 2024 Chinese Academy of Sciences. All rights reserved;
D O I：
10.1360/SST-2024-0066
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页码：1979 / 1990
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