红树林的尾根和侧根吸收和转移带有不同电荷的微塑料的差异
Yichun Lin1, Luya Wang2, Bigui Lin3
1Environmental and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China.
The Science of the total environment
|June 22, 2024
概括
红树林根可以拦截微塑料 (MP),但它们的命运尚不清楚. 这项研究表明,粒子大小和电荷会影响Aegiceras corniculatum中的MP吸收和转移,甚至有一些MP从叶子中释放出来.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料 (MP) 构成环境风险,红树林根在拦截中发挥着关键作用.
- 有限的研究存在于红树林生态系统中的国会议员的命运和运输.
研究的目的:
- 调查聚乙烯 (PS) MPs (0.2微米和2微米) 的吸收和转移,在盐分泌红树林Aegiceras corniculatum中具有不同的表面电荷.
- 了解粒子大小,表面电荷和根结构对MP进入和在红树林内的运动的影响.
主要方法:
- 在Aegiceras corniculatum中利用了0.2μm和2μm的碳素和氨基功能化PS MPs的可视化跟踪.
- 分析了通过尾根和侧根的MP吸收,考虑到根毛分泌物和Zeta潜力.
- 观察到植物内的MP转移以及从叶子表面的潜在释放机制.
主要成果:
- 负电荷 (PS-COOH) 的吸收更多地依赖于塔根,而正电荷 (PS-NH2) 通过特定的途径进入侧根.
- 工厂内的粒子大小限制了MP转移.
- 观察到微塑料通过盐腺和胃腺从叶子表面释放出来,影响了叶子的光化学效率.
结论:
- 红树林的根结构和表面电荷显著影响了微塑料吸收途径.
- 颗粒大小是限制红树林内微塑料转移的关键因素.
- Aegiceras corniculatum可以释放微塑料,表明复杂的环境循环和根拦截之外的潜在风险.
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