印度东北部不同水种植系统中微塑料和相关元素成分的变化
Euni Gogoi1, Jintu Kumar Bania1, Shuvasish Choudhury2
1Department of Ecology and Environmental Science, Assam University, Silchar, 788011, India.
Bulletin of environmental contamination and toxicology
|October 10, 2025
概括
在农业土壤中,特别是博罗大米田中,微塑料污染很高. 自然森林的污染程度较低,这凸显了需要在农业中更好地管理塑料废物.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生态毒理学 生态毒理学
背景情况:
- 全球塑料使用每年产生数百万的微塑料废物.
- 海洋微塑料污染得到了充分的研究,但农业生态系统污染,特别是在米土壤中,是研究不足的.
- 微塑料带来了环境和潜在的健康风险.
研究的目的:
- 评估和量化Cachar地区不同农业用地的微塑料污染.
- 为了确定在米土壤中的微塑料的类型,大小和元素组成.
- 为在农业生态系统中管理塑料废物建立基线数据.
主要方法:
- 现场采样涉及四种土地使用类型:博罗大米,雨大米,高地大米和自然森林.
- 微塑料的提取和量化 (每100克土壤中的颗粒).
- 使用扫描电子显微镜 (SEM) 和能量分散式X射线光谱 (EDX) 进行表征.
主要成果:
- 博罗大米种植的微塑料污染率最高 (213颗颗粒/100克),自然森林的微塑料污染率最低 (98颗颗粒/100克).
- 纤维 (89.86%) 是主要的微塑料类型,其次是碎片 (10.14%).
- 大多数微塑料是<500μm (67.79%);SEM/EDX显示了土地用途之间的纹理和元素组成 (C,O,Al,Si,Cu,S,Br,Mo) 的差异.
结论:
- 农业土壤,特别是密集种植大米的土壤,是微塑料污染的重要储存地.
- 这些发现为制定减轻农业生态系统中微塑料污染的战略提供了关键的基线数据.
- 了解微塑料的特性对于评估环境和健康影响至关重要.
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