沉积物摄入对底部养鱼暴露在化学元素中的作用
W Nelson Beyer1, Alfred E Pinkney2
1Eastern Ecological Science Center, US Geological Survey, Laurel, Maryland.
Environmental toxicology and chemistry
|March 22, 2024
概括
底部养的鱼类主要通过沉积物摄入无机污染物. 了解沉积物摄入对于准确评估水生生态系统中的毒理风险至关重要.
科学领域:
- 环境毒理学环境毒理学
- 生态毒理学 生态毒理学
- 水生生态学 水生生态学
背景情况:
- 底部养的鱼在养期间偶尔会摄入沉积物.
- 沉积物可以成为水生生物的无机污染物的重要来源.
研究的目的:
- 量化沉积物摄入对底部养鱼体内无机污染物口腔总体暴露的贡献.
- 为了区分污染物从沉积物和食物来源的吸收.
主要方法:
- 收集了来自七种底部养鱼类的消化物.
- 使用元素度 (Co, Cr, Ni, Ti, V, Y) 开发了一种沉积物跟踪变量.
- 八种元素的回归度因子与沉积物追踪器变量相对应.
主要成果:
- 沉积物摄入是,,,,和的主要来源.
- ,和铜主要从没有沉积物的食物中摄入.
- 在研究的21种元素中,12种元素与沉积物含量呈正相关性 (p < 0.005).
结论:
- 沉积物摄入是底部养鱼类中无机污染物的关键暴露途径.
- 准确的毒理风险评估必须考虑到沉积物摄入.
- 对和等元素的额外口服来源进行进一步的调查是有必要的.
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