带有环保标签的堆肥减少了微塑料污染,并减轻了农业生态系统中重金属的生物可用性
Javier Bayo1, Joaquín López-Castellanos2, Marta Doval-Miñarro2
1Department of Chemical and Environmental Engineering, Polytechnic University of Cartagena, Paseo Alfonso XIII 44, 30203, Cartagena, Spain. javier.bayo@upct.es.
Scientific reports
|September 25, 2025
概括
微塑料 (MPs) 污染了所有测试的堆肥,环保标签产品的含量较低. 这些塑料污染物与堆肥质量下降和微量元素分布的改变相关,突出了需要更好的废物管理.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 土壤科学 土壤科学
背景情况:
- 微塑料 (MP) 污染在环境矩阵中越来越令人担忧.
- 堆肥产品是MP进入陆地生态系统的潜在途径.
- 了解MP特征及其对堆肥质量影响至关重要.
研究的目的:
- 量化和描述商业堆肥中的微塑料.
- 调查MPs与堆肥物理化学性质之间的关系.
- 评估MPs对堆肥中微量元素分布的影响.
主要方法:
- 对11个商业堆肥样本进行MP丰度,大小,重量和形状的分析.
- 使用减弱总反射率里埃变换红外光谱法 (ATR-FTIR) 识别聚合物组成.
- MP度与堆肥物理化学参数和微量元素之间的相关性分析.
主要成果:
- 在所有堆肥样本中检测到微塑料,平均丰度为137.65件/kg dw.
- 与非生态产品相比,带有环保标签的堆肥的MP数量,大小和度明显较低.
- MP度与pH和负相关,与有机物积极相关,影响了微量元素的分布.
结论:
- 商业堆肥是微塑料污染的重要来源.
- 微塑料污染会对堆肥质量产生负面影响,并改变微量元素的生物可用性.
- 改善废物分离和堆肥法规是必要的,以减轻MP和相关的重金属污染.
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