在口服给产母后,[14C]-聚乙烯微塑料的命运和处置
Weilin L Shelver1, Amy M McGarvey1, Lloyd O Billey1
1USDA Agricultural Research Service, Edward T. Schafer Agricultural Research Center, 1616 Albrecht Boulevard, Fargo, ND 58102, United States of America.
The Science of the total environment
|November 17, 2023
概括
聚乙烯微塑料 (MP) 吸收能力较差,母很快消除96%以上的微塑料. 这表明,家禽中的食MP带来了最小的食品安全风险,并返回环境.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 动物科学动物科学
背景情况:
- 微/纳米塑料 (MP) 是广泛存在于各种生态系统和食物来源中的环境污染物.
- 虽然在动物排泄物中发现了MP的存在,但它们在陆地食物动物中的命运在很大程度上是未知的.
研究的目的:
- 研究产母中聚钢 (PS) 微塑料 (MP) 的吸收,分布和消除.
- 评估与家禽摄入MP相关的潜在食品安全风险.
主要方法:
- 给产母注入了一剂放射性标记的聚乙烯微塑料 (C-PS MP).
- 在7天的时间内,在血液,组织,卵子和便中量化了放射性.
- 组织和便样本从特定的预备日收获的母中收集.
主要成果:
- 在血液,卵子和组织中发现的剂量的不到1%,表明PS-MP的吸收不良.
- 在第一天内,观察到便中几乎有量的放射性恢复 (96.8%).
- 快速消除表明在家禽组织和蛋中积累的数量最小.
结论:
- 聚乙烯微塑料被产卵吸收得很差.
- 在家禽中通过饮食接触PS-MP不太可能引起严重的食品安全问题.
- 预计大多数被摄入的PS-MP将被消除并返回到环境中.
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