澳大利亚加工有机物中的微塑料:丰富度,特性和潜在的运输到土壤生态系统
Hsuan-Cheng Lu1, Winnie Cao2, Scott Jones2
1Australian Rivers Institute, School of Environment and Science, Griffith University, Southport, QLD, 4222, Australia.
Journal of environmental management
|February 5, 2025
概括
微塑料 (MPs) 存在于澳大利亚的堆肥等再生有机废物中,可能会转移到土壤中. 可堆肥袋可能是一个来源,强调需要进一步研究MP命运和影响.
科学领域:
- 环境科学 环境科学
- 废物管理 废物管理
- 聚合物科学 聚合物科学
背景情况:
- 生物固体和堆肥等再生有机材料用于废物管理,减少了填埋场的负担.
- 有关回收有机物和土壤转移中的微塑料 (MP) 污染存在担忧.
- 生物固体中MP的存在已被记录,但对加工有机废物 (如堆肥) 的数据有限.
研究的目的:
- 调查澳大利亚加工有机废物中微塑料 (>25微米) 的数量,特性和潜在来源.
- 分析来自11个不同的加工场所的堆肥,无氧消化剂和脱水食品废弃物样本.
- 通过这些材料的应用,评估MP转移到陆地的潜力.
主要方法:
- 在澳大利亚11个地点收集加工有机废物 (堆肥,消化剂,脱水食品废物) 的样本.
- 识别和量化了微塑料,专注于大于25微米的颗粒.
- 分析了尺寸,形态和密度等特征,以估计质量丰度.
主要成果:
- 在所有样本中检测到微塑料,主要是聚乙烯,聚烯和聚.
- MP度在1500至16000MP/kg干重之间,大多数MP在25-500μm之间.
- 估计每年通过加工的有机废物将MP转移到澳大利亚的土地上,范围从5.2×10^10到6.2×10^12MP.
- 在一些样本中,可堆肥袋被确定为潜在的MP来源.
结论:
- 这项研究为澳大利亚处理有机废物中的国会议员提供了第一个证据.
- 目前有大量的国会议员,有可能进行大量的土地转让.
- 需要进一步研究MP在堆肥过程中的命运,土壤污染贡献以及对土壤生物群的影响.
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