微塑料在不同土地使用类型的土壤配置中的垂直分布和气候特征
Yifei Qiu1, Shenglu Zhou1, Chuchu Zhang2
1School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China; Key Laboratory of Coastal Zone Exploitation and Protection, Ministry of Natural Resources, Nanjing 210024, China.
The Science of the total environment
|September 14, 2023
概括
微塑料 (MP) 迁移到土壤中更深处,在田和干旱地区的度更高. 土壤聚合物和根源充当过器,而较深层的较小的MP则是土壤表层气候变化的结果.
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 (MPs) 构成环境风险,因为它们可以从表层土壤迁移到更深层土壤和地下水.
- 在自然土壤中MP的垂直分布和气候变化仍然不太清楚,需要进一步调查.
研究的目的:
- 调查微塑料在土壤形状中的垂直分布和气候变化特征.
- 为了比较不同土地使用类型的MP分布,并评估影响其迁移的因素.
主要方法:
- 在中国太湖西岸的四种土地使用类型 (田,干地,茶园,林地) 收集了土壤概况 (0-100厘米).
- 在不同的土壤深度分析了微塑料的丰富度,大小和碳酸指数.
- 使用结构方程建模来确定影响MP垂直迁移的因素.
主要成果:
- 微塑料的丰富度在田 (490±82个物品/千克) 中最高,在林地 (171±27个物品/千克) 中最低,在顶部0-10厘米层.
- 随着土壤深度 (r = -0.89,p < 0.01) 的增加,MP的丰度线性下降.
- 干旱地区和田的MP迁移到更深的土壤层 (80-100厘米),其碳酸指数随着深度的增加而增加,表明气候变化和碎片化.
结论:
- 土壤深度和土地利用显著影响微塑料的垂直分布和气候变化.
- 植物根和土壤聚合物充当关键的过器,调节微塑料的向下迁移.
- 了解土壤中的MP命运对于评估生态风险和制定减缓策略至关重要.
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