生物降解微塑料聚乳酸与的同时暴露对地的生态毒理效应高于传统微塑料聚烯与的对地的影响
Guangshen Shang1, Junjie Zhai1, Guangxia Xu1
1College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Biodiversity and Organic Farming, Beijing 100193, China; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China.
The Science of the total environment
|September 12, 2023
概括
微塑料 (MPs) 不仅会损害虫的生长或繁殖. 然而,一些像PS和PLA这样的国会议员加剧了重金属污染,增加了毒性和Cd在中的积累.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 土壤生物学 土壤生物学
背景情况:
- 微塑料 (MP) 是广泛存在的环境污染物.
- 对于MPs对土壤动物的生态毒理影响,特别是与重金属相结合的生态毒理影响,尚未完全理解.
- 可生物降解塑料被提出为更安全的替代品,但它们对环境的影响需要研究.
研究的目的:
- 评估各种微塑料 (MP) 和 (Cd) 对的单独和联合影响.
- 调查传统MP (PS) 和生物降解MP (PLA) 的生态毒理影响,并与Cd.
- 评估MPs对土壤健康和动物的潜在风险.
主要方法:
- 土虫生存,生长和繁殖的测试.
- 组织学检查,生物化学分析,彗星分析和qPCR.
- 测量Cd含量和计算综合生物标志物响应 (IBR) 指数.
主要成果:
- 六种传统的MP和PLA并没有对虫的生长,生存或繁殖产生不利影响.
- 虫表现出对PLA的回避行为.
- 无论PS还是PLA都加剧了Cd污染,导致DNA损伤,抗氧化系统受损,并且增加了地中的Cd积累.
- PLA和Cd的关节毒性高于PS和Cd的关节毒性.
结论:
- 虽然传统的和可生物降解的MP单独可能不会伤害地,但它们与Cd等重金属的相互作用会带来显著的生态毒理风险.
- 像PLA这样的可生物降解塑料可能会加剧重金属污染,可能会否定它们预期的环境效益.
- 议员们加强了虫中的Cd积累,强调了受污染的土壤中复杂的相互作用和生态风险.
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