在农业土壤中选微塑料:在提取和分析中应用绿色化学原理
Diana Rede1, Rui Vilarinho2, Joaquim Agostinho Moreira2
1REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernandino de Almeida 431, 4249-015, Porto, Portugal; Departamento de Química e Bioquimica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169- 007 Porto, Portugal.
Environmental pollution (Barking, Essex : 1987)
|December 19, 2024
概括
这项研究开发了一种使用QuEChERS原则在农业土壤中检测微塑料 (MPs) 的更绿色方法. 该方法有效地提取了国会议员,显示了可持续环境监测的前景.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 绿色化学 绿色化学
背景情况:
- 微塑料 (MP) 污染是一个普遍的环境问题,影响了包括农业土壤在内的各种生态系统.
- 目前缺乏标准化和有效的方法来量化土壤中的MP.
- 在环境监测中,越来越需要可持续的分析方法.
研究的目的:
- 开发和验证农业土壤中微塑料提取和量化绿色分析方法.
- 通过已建立的绿色化学指标来评估拟议方法的效率和可持续性.
- 选农业土壤样本以检测中塑料和微塑料的存在.
主要方法:
- 基于QuEChERS的提取方法,包括密度分离和离心,适用于土壤样本.
- 使用经过认证的土壤进行了回收试验,这些土壤上含各种类型和大小的微塑料 (15-300微米和3-5毫米).
- 用光谱分析 (Raman) 来识别MP,并使用分析生态尺度和AGREE指标评估可持续性.
主要成果:
- 该方法实现了高回收率:小国会议员>69%,大国会议员>91%.
- 在农业土壤样本中检测到9种中塑性物质 (主要是PP和PE) 和7种MP物质 (包括PE基物质和一种纤维).
- 光谱分析表明,在提取后的MPs中出现了轻微的光谱变化,并且在土壤样本中发现了光谱干扰.
- 该方法表现出良好的可持续性,分析生态规模得分为82/100,AGREE得分为0.66.
结论:
- 开发的基于QuEChERS的方法为农业土壤中的微塑料分析提供了可持续和高效的方法.
- 整合绿色分析化学原理提高了MP监测的可靠性和环境兼容性.
- 该研究为评估农业环境中的微塑料污染提供了有价值的工具,解决了标准化方法学的关键差距.
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