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开发评估城市陆地鸟类食物网内 perfluoroalkyl 物质的热量放大方法

Katharine M Fremlin^1,2, John E Elliott^1,2, Robert J Letcher³

¹Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.

Environmental science & technology

|August 17, 2023

概括

这项研究表明,某些 perfluoroalkyl 物质 (PFAS) 在陆地食物网中生物放大. 基于化学活动的热量放大因子 (TMF) 提供了对PFAS生物积累的更准确的评估.

科学领域:

环境化学环境化学
生态毒理学生态毒理学
生物地质化学生物地质化学

背景情况:

perfluoroalkyl物质 (PFAS) 是持久的环境污染物,具有复杂的生物积累行为.
了解PFAS在陆地食物网中的热量放大潜力 (TMP) 对生态风险评估至关重要.
之前对PFAS热带放大量的评估由于规范化方法存在局限性.

研究的目的:

在陆地食物网中研究各种 perfluoroalkyl 酸 (PFAA) 的热量放大潜力.
利用基于化学活性的方法进行热力学准确的PFAS度比较.
评估不同生物化学规范化代理的适用性,用于PFAS热量放大.

主要方法:

收集和分析蛋,歌鸟组织和无脊椎动物的18个PFAA.
在生物样本中量化极性脂质,中性脂质,总蛋白质,白蛋白和水含量.
基于化学活动的热量放大因子 (TMFs) 的计算,使用正常化的PFAS度.

主要成果:

链较短的PFAS (PFCA C8-C11,PFSA C4-C8) 主要被分割成白蛋白.
更长链的PFAS (C12-C16) 主要分为极性脂质.
特定的PFAS包括PFNA,PFDA,PFOS和PFDS生物放大,而其他如PFOA没有,PFBS生物化.

结论:

基于化学活性的TMF可以更准确地评估PFAS的热量放大.
对总蛋白或白蛋白的正常化可以作为特定PFAS群体的适当代理.
这项研究完善了我们对陆地生态系统中PFAS生物积累动态的理解.

关键词:

这就是PFAA.在PFAS中,有很多方法.化学活动化学活动蛋白质爱好者的蛋白质爱好者陆地食物网络陆地食物网络获得奖杯的放大效果.

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