在两座热带淡水湖中发现基和多基物质的存在,生物积累和热带动力学
Aina O Adeogun1, Azubuike V Chukwuka2, Oju R Ibor3
1Department of Zoology, University of Ibadan, Ibadan, Nigeria.
Environmental pollution (Barking, Essex : 1987)
|February 16, 2024
概括
这项研究揭示了尼日利亚湖泊中的per-和多基物质 (PFAS),显示城市强度对污染物水平和鱼类生物放大产生影响. 还检测到了新的PFAS化合物,突出了水生动物食品安全的风险.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 分析化学 分析化学
背景情况:
- 和多基基物质 (PFAS) 是持续的环境污染物,引起全球越来越多的关注.
- 了解热带水生生态系统中的PFAS发生,分布和生物放大对于风险评估至关重要.
- 城市化对非洲淡水系统污染物动态的影响仍未得到充分研究.
研究的目的:
- 调查尼日利亚两个不同城市强度的热带湖泊中PFAS的发生,分布和生物放大.
- 分析 PFAS 同源物和相关的毒理反应,在不同鱼类物种的热带水平.
- 评估城市化对PFAS污染的影响及其对尼日利亚水生食品安全的影响.
主要方法:
- 在8个月的时间内,采集沉积物和鱼类 (Clarias gariepinus,Oreochromis niloticus,Coptodon guineensis,Sarotherodon melanotheron) 的样本.
- 用先进的分析技术分析各种PFAS原体并选择毒理反应.
- 对关键PFAS化合物的不同热层估计生物放大因子 (BMF).
主要成果:
- 在来自Asejire (郊区) 和Eleyele (城市) 湖的鱼类中观察到明显的PFAS概况,具有不同的同源主导地位.
- 包括PFOS,PFUnA和PFDA在内的特定PFAS的生物放大显而易见,特别是在城市湖中.
- 检测到新的PFAS化合物 (diSAMPAP,9CL-PF3ONS),毒理反应因食量水平和环境因素而异.
结论:
- 城市化显著影响热带湖泊生态系统中的PFAS污染水平和生物放大动态.
- 这项研究提供了尼日利亚PFAS的第一个全面文档,突出了水生动物食品安全的潜在风险.
- 调查结果强调需要监测和管理战略,以减轻非洲淡水环境中的PFAS污染.
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