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Jiajia Zhang¹, Ning Guo², Wencheng Ding³

¹Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.

Journal of hazardous materials

|June 25, 2023

概括

有机堆肥为土壤提供微塑料 (MP). 固体废弃物堆肥具有最高的MP,而作物草具有最低的MP,这表明不同类型的堆肥存在不同的生态风险.

科学领域:

环境科学环境科学
土壤科学土壤科学
聚合物科学聚合物科学

背景情况:

有机堆肥越来越被认为是农业土壤中微塑料 (MP) 的来源.
来自各种原材料的有机堆肥中MPs污染的程度在很大程度上仍未得到量化.

研究的目的:

调查不同类型的有机堆肥中MPs的发生和特征.
量化评估与MPs污染有关的生态风险.

主要方法:

分析了124个来自单一原料 (牲畜,家禽,作物,固体废物) 和复合肥料的有机肥料样本.
描述MP的尺寸,形状,聚合物类型和气候变异形态.
基于聚合物丰富性和危险性得分的MPs诱导风险指数的计算.

主要成果:

国会议员的丰富性差异很大,固体废物堆肥显示最高 (6615个项目kg-1),作物草显示最低 (1500个项目kg-1).
堆肥MP主要是0.5-1毫米的碎片和薄膜 (聚烯,聚乙烯) 和纤维 (聚乙烯四甲).
农田土壤的年度投入范围从6.96 × 107到1.88 × 108个项目每年1.1.
议员诱导的风险指数范围从固体废物堆肥中的高风险 (第四级) 到作物草堆肥中的低风险 (第二级).

结论:

有机堆肥是农业土壤中MPs积累的重要途径,根据原料有很大差异.
堆肥的特点和生态风险在堆肥类型之间显著不同,需要仔细选择和管理原料.
这些发现为减轻农业中堆肥应用的MP污染提供了科学依据.

关键词:

微塑料的输入材料是微塑料.事件发生的特征.有机堆肥有机堆肥污染风险水平污染风险水平气候变化的形态学

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