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在中国,在有机农业发展中的微塑料污染不能被忽视:商业有机肥的前景

Haoran Zhao¹, Yanting Zhou¹, Zonghui Lu¹

¹College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.

Journal of hazardous materials

|September 9, 2023

概括

商业有机肥料是中国微塑料 (MP) 的重要来源,带来了高的生态风险. 这项研究量化了肥料中的MP,突出了污染热点和未来的土壤积累.

科学领域:

环境科学环境科学
农业科学农业科学
材料科学材料科学材料科学

背景情况:

有机农业在很大程度上依赖于商业有机肥料.
商业有机肥料越来越被认为是微塑料 (MP) 污染的潜在来源.
缺乏关于中国商业有机肥的MP发生率和生态风险的全国数据.

研究的目的:

调查中国各地商业有机肥中的MPs的数量,大小,类型和形态.
评估这些肥料中MPs相关的生态风险.
预测农业土壤未来的PM污染情况.

主要方法:

立体镜和激光红外成像光谱学用于MP分析.
在全国范围内从商业有机肥料中收集样本.
使用H指数来量化生态风险.

主要成果:

商用有机肥料中含有大量的MP (8.88×103到2.88×105个物品/公斤),其中76.53%是小尺寸的 (<100微米).
主导的MP类型包括化聚乙烯,聚氨,聚乙烯和聚烯,主要以薄膜和碎片形式.
根据H指数,大多数肥料样本呈现出高生态风险 (III级),其中中国东部的污染负载最高.

结论:

商业有机肥料是中国农业土壤中微塑料污染的重要途径.
小尺寸的MP (<100μm) 是普遍存在的,构成相当大的生态风险.
预计在五年内,果园土壤将积累2.32 × 1013 - 2.81 × 1016个MP,特别是在中国南部,西南和东部,这将影响有机农业的可持续性.

关键词:

商业有机化肥有机化肥商业化肥生态风险生态风险微塑料的污染微塑料的污染有机农业是有机农业.土壤土壤土壤.

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