一种创新的微塑料提取技术:可切换的化密度分离柱测试了可生物降解的聚合物,聚乙烯和聚胺
Darya Rodina1,2, Christian Roth2, Wendel Wohlleben2
1Department of Chemistry, University of Rochester, Rochester, NY 14627, United States.
MethodsX
|January 31, 2024
概括
这项研究引入了一种新的,非破坏性的方法,利用可切换的化密度分离柱从堆肥中提取微塑料,从而保留分析的颗粒特性.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 从复杂的环境矩阵中提取微塑料是具有挑战性的,因为苛刻的化学处理可以改变颗粒的特性.
- 需要可靠的方法来量化微塑料并评估其物理化学性质,而不会引起重大变化.
研究的目的:
- 开发一种创新的,非破坏性的微塑料从堆肥中提取协议.
- 通过尽量减少化学处理,使微塑料特性 (例如表面化学,纹理) 的有针对性的分析成为可能.
主要方法:
- 开发了一个可切换的化密度分离柱.
- 使用温度控制来改变盐溶液的聚合状态以进行矩阵分离.
- 采用光标记的微塑料用于视觉方法开发和回收测试的验证.
- 用低密度聚乙烯 (LDPE) 和聚胺 (PA) 测试了该方法,包括UV老化LDPE.
主要成果:
- 在未老化和紫外线老化低密度聚乙烯 (LDPE) 中实现了高回收率 (>97 wt-%) .
- 证明有效地去除了堆肥基质.
- 由于聚胺 (PA) 颗粒的尺寸较小和密度较高,观察到较低和不太一致的回收率 (18-68 wt-%) .
结论:
- 开发的方法提供了一种低成本,简单和非破坏性的方法,用于从堆肥中提取微塑料,适合进行属性分析.
- 该技术尽量减少严厉的化学处理,保持微塑料的完整性.
- 为了提取具有挑战性的微塑料类型,如聚胺,可能需要进一步调整方法.
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