在野生鸟类中,微塑料和纳米塑料的器官水平转移和组织特异性积累
Mengzhu Wang1, Shirui Wang1, Pinxi Zhou1
1Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan 610065, China; Sichuan Key Laboratory of Conservation Biology on Endangered Wildlife, College of Life Sciences, Sichuan University, Chengdu, Sichuan 610065, China.
Journal of hazardous materials
|December 11, 2025
概括
野生鸟类在各种组织中积累微纳米塑料 (MNP),较小的物种和暴露地点显示出更高的负担. 纳米塑料比微塑料更容易转移,突出了潜在的风险和鸟类作为生物指标.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 野生动物生物学 野生动物生物学
背景情况:
- 全球塑料污染将微塑料 (MP) 和纳米塑料 (NP) 引入到陆地生态系统中.
- 野生动物中MNP的体内命运和组织分布在很大程度上仍然没有被描述.
研究的目的:
- 量化十种野生鸟类中六种组织的MNP负担.
- 调查MNP分布模式与身体质量,颗粒大小和类型的关系.
- 评估鸟类作为陆地MNP污染的生物指标的潜力.
主要方法:
- 使用激光直接红外光谱学 (LDIR) 量化MPs (20-500μm).
- 量化NP (<1μm) 使用热解气体染色学质谱法 (Py-GC-MS).
- 分析了羽毛,肺部,肠道内容,血液,大脑和胸肌中的MNP负担.
主要成果:
- 小型鸟类的MNP负担高于较大的物种.
- 暴露接口 (例如,羽毛,肺) 含有更多的MNP比内部器官.
- 与MP相比,NP显示出更大的转移潜力,其中特定的聚合物 (ACR,PVC,PET) 主导内部组织.
- 血液中MNP水平与内部器官负担有积极的相关性,这表明血液是潜在的代理物.
- 危险分析表明,大多数器官,特别是PVC和PU中存在高风险的MNP负担.
结论:
- 本研究介绍了自然暴露下的野生鸟类中第一个器官级MNP分布图.
- 鸟类作为神秘的陆地塑料污染的有价值的生物指标.
- 由于已发现的风险,特定的塑料类型 (PVC,PU) 和颗粒特性需要监管关注.
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