在不同的土地条件下,微塑料的发生特征和潜在风险在不同的土地条件下
Yanhua Wang1, Na Xiao1, Zhibao Dong1
1School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China.
Environmental pollution (Barking, Essex : 1987)
|May 31, 2024
概括
微塑料 (MP) 污染在农田土壤中最高,随着土地恢复而减少,并因作物类型而异. 聚烯 (PP) 和聚乙烯二甲 (PET) 是占主导地位的MP类型,具有中等污染风险.
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:
- 微塑料 (MP) 污染是全球日益关注的问题,特别是在农业土壤中.
- 关于MP分布在不同土地用途,恢复期和作物类型之间存在有限的研究.
研究的目的:
- 调查中国山西省北部国会议员的分布特征.
- 评估各种土壤环境中与PM污染相关的生态风险.
- 了解土地使用,恢复年龄和作物类型如何影响MP污染.
主要方法:
- 在不同的土地使用类型,恢复年和作物类型中收集了土壤样本.
- 使用拉曼光谱和激光直接红外光谱 (LDIR) 分析了微塑料的丰度,颗粒大小,形态和聚合物类型.
- 用生态风险指数 (H) 和污染负载指数 (PLI) 评估生态风险.
主要成果:
- 农田土壤的MP度最高 (4483个物品·千克-1),明显高于工业园区土壤.
- 随着土地恢复年数的增加,MP的丰度下降,而较小的颗粒大小变得更加普遍.
- 聚烯 (PP) 和聚乙烯二甲 (PET) 是主要的聚合物类型,大小在20-40微米之间是最常见的. 51.9%的地点显示有中度污染.
- 与一年一度的作物相比,多年作物具有更稳定的MP含量和更小的颗粒大小.
结论:
- 农田土壤对微塑料污染的风险最高.
- 土地恢复和作物类型显著影响MP分布和特征.
- 了解这些因素对于评估和减轻农业生态系统中微塑料污染的生态风险至关重要.
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