从田地土壤中提取的微塑料的识别,用市政生物固体进行修改
Maohui Chen1, Brian Coleman1, Liliana Gaburici2
1Metrology Research Centre, National Research Council Canada, Ottawa, Ontario, Canada.
The Science of the total environment
|October 23, 2023
概括
研究人员开发了一种方法来提取和识别土壤中的微塑料,使用热重力测量分析-里埃变换红外光谱学 (TGA-FTIR). 实地土壤分析显示出显著的异质性,具有挑战性的可再生微塑料量化.
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:
- 耕地中的微塑料对环境和人类健康构成风险.
- 城市生物固体 (MBs) 应用于农田,将微塑料引入陆地生态系统.
- 需要准确的方法来量化土壤中的微塑料,以评估环境风险.
研究的目的:
- 开发和验证一种从农业土壤中提取和表征微塑料 (5微米至2毫米) 的方法.
- 在实验室和现场条件下评估开发方法的可靠性.
- 调查环境异质性对微塑料检测的影响.
主要方法:
- 从土壤样本中开发微塑料提取协议.
- 使用热重力测量分析与富里埃变换红外光谱学 (TGA-FTIR) 结合使用微塑料的表征.
- 方法的验证使用尖端土壤样本,并分析现场应用的MB处理土壤.
主要成果:
- 在实验室环境中,TGA-FTIR方法可靠地从土中提取和识别了微塑料.
- 将该方法应用于现场样本时,即使在同一地点内,微塑料的数量和类型也显示出显著的变化.
- 环境异质性对农业土壤中可再生微塑料的量化构成了重大挑战.
结论:
- 开发的TGA-FTIR方法在受控的实验室环境中对微塑料分析是有效的.
- 农业土壤中显著的环境异质性使准确和可重复的微塑料量化变得复杂.
- 需要进一步的研究来应对在微塑料监测中土壤异质性带来的挑战.
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