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一项关于堆肥,填埋场土壤和浸物中微塑料的量化和表征的综合研究

Ankit Prakashvir Dubey¹, Arun Kumar Thalla¹

¹Bioprocesses Engineering Laboratory, Department of Civil Engineering, National Institute of Technology Karnataka, Mangalore, Karnataka, India.

Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA

|June 17, 2025

概括

微塑料 (MP) 在城市固体废物中普遍存在,垃圾填埋场是其中的主要来源. 这项研究量化了土壤,堆肥和液中的MPs,揭示了高度的小塑料碎片.

科学领域:

环境科学环境科学
分析化学分析化学
废物管理废物管理

背景情况:

微塑料 (MP) 是一种新兴的合成污染物,存在于各种环境中.
市政固体废物处理厂处理大量废物,可能会积累MP.

研究的目的:

评估土壤中微塑料的数量和特征,湿肥料 (WC),黑士兵肥料 (BSC) 和垃圾填埋液 (LL).
为了确定这些废物矩阵中的MP类型和分布.
评估微塑料提取方法的效率.

主要方法:

使用芬顿试剂进行样品预处理.
密度分离用于微塑料的隔离.
使用数字便携式显微镜进行分类 (形状,颜色,大小) 的分析.
通过减弱总反射率-里埃变换红外光谱学 (ATR-FTIR) 识别聚合物类型.

主要成果:

发现了高的MP度:土壤 (7590 ± 1004 MP kg-1),BSC (5900 ± 566 MP kg-1),WC (11,350 ± 354 MP kg-1),和LL (98.8 ± 6.8 MP L-1).在土壤中,MP度是高的.
很大一部分MP (85%在土壤中,86%在堆肥中,72.6%在LL中) 小于300微米.
聚烯和聚乙烯是主要的聚合物类型,碎片是最常见的形状.
提取方法的回收率为土壤的77.9%,堆肥的80%,液的94.3%.

结论:

垃圾填埋场是微塑料的重要来源,有助于环境污染.
大多数发现的MP都是小碎片,带来潜在的风险.
开发的提取方法证明了各种废物矩阵的良好回收效率.

关键词:

在ATR-FTIR中使用.黑兵堆肥是黑兵堆肥的一种.微塑料是一种微塑料.垃圾填埋场是一个垃圾填埋场.湿堆肥是一种湿堆肥.

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