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在有机肥料残留物中进行微塑料提取,定量和表征的新型综合工作流程,使用微里叶变换红外光谱学 (μ-FTIR) 进行微塑料提取,定量和表征

Mohamed Zakaria Gouda¹, Steeve Roberge², Lotfi Khiari³

¹Department of Soil Science and Agrifood Engineering, Laval University, Quebec, QC, G1V 0A6, Canada; Centre d'Expertise en Analyse Environnementale du Québec, Ministère de l'Environnement, de la Lutte Contre les Changements Climatiques, de la Faune et des Parcs, Québec, QC, G1P 3W8, Canada.

|March 29, 2025

概括

一种新方法有效地从农业土壤修改中去除有机物质,使微塑料 (MP) 能够在环境安全评估中精确检测到10微米.

科学领域:

环境科学环境科学
分析化学分析化学
土壤科学土壤科学

背景情况:

有机肥料残留物 (OFRs) 对于可持续农业至关重要,但也是微塑料 (MPs) 的重要来源.
从有机丰富的OFR中提取小MP带来分析挑战,阻碍了准确的风险评估.

研究的目的:

开发和验证可靠的工作流程,用于分析各种有机肥料残留物中的微塑料.
为了实现高效的有机物去除和高回收率的各种微塑料类型和大小.

主要方法:

一种氧化-联消化法,用于去除有机物质 (平均效率为93%).
使用NaCl和ZnCl2盐水进行密度离心,用于微塑料回收.
微里叶变换红外光谱学 (μ-FTIR) 用于聚合物识别和完整性确认.

主要成果:

工作流实现了大MP的95%以上的回收 (600μm-4.75mm) 和小MP-PE珠子 (38-45μm) 的83%以上.
消化和分离并没有损害议员的光谱完整性.
应用到北克的OFRs,工作流检测到19个MP聚合物到10-50μm.

结论:

开发的工作流程可以有效地从各种OFR中提取,量化和表征微塑料.
该方法促进了可靠的风险评估和环境管理,以减轻农业土壤中的微塑料污染.

关键词:

有机物去除效率有机物去除效率.氧化 - 性双重消化消化聚合物回收利用方法小微塑料的回收利用方法频谱完整性是指光谱的完整性.

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