从废水处理厂到农田:微塑料的量化,转移和生物固体使用的风险评估在澳大利亚塔斯马尼亚州
Sadique Anyame Bawa1, Anna Wrobel-Tobiszewska1, Andrew Chan1
1School of Engineering, University of Tasmania, Australia.
The Science of the total environment
|December 27, 2025
概括
污水处理厂通过生物固体将微塑料 (MP) 转移到农业土壤中. 这项研究量化了塔斯马尼亚废水和生物固体中的MP,估计了年度土壤转移和初步的生态风险,强调了监测的必要性.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 分析化学 分析化学
背景情况:
- 污水处理厂 (WWTP) 清除微塑料 (MP),但生物固体的再利用将它们转移到土壤中.
- 这给农业生态系统带来了潜在的环境风险.
- 在废水,生物固体及其土壤转移中量化MPs至关重要.
研究的目的:
- 量化塔斯马尼亚废水和生物固体中的微塑料 (MPs),包括小于20微米的颗粒.
- 通过生物固体的再利用,估计每年将MPs转移到农业土壤.
- 进行对 MPs 在土壤中构成的生态风险的初步评估.
主要方法:
- 使用FPA-μFTIR用于废水和生物固体中的微塑料量化.
- 分析的MP形态型和聚合物类型 (PE,PVC,PU,PP,PET).
- 基于区域生物固体应用和使用PHI和PERI评估风险的估计MP传输率.
主要成果:
- 在流入废水中检测到163.50206.5 MPs/L,在生物固体中检测到127.67138.0 MPs/g.
- 碎片是占主导地位的形态类型;>1020微米的粒子是最常见的.
- 估计每年将3.43×10^10至1.30×10^11个MP颗粒转移到塔斯马尼亚农业土壤.
结论:
- 微塑料通过生物固体再利用转移到土壤是重要的,对土壤健康有潜在威胁.
- 预先的风险评估显示了潜在的生态问题,尽管仍存在不确定性.
- 需要加强生物固体中的MP监测,以制定可持续的再利用政策和法规.
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