处理污水污泥的无氧消化器中的微塑料:发生情况和影响其与拉曼光谱学识别的因素
Maria Clara Lessa Belone1, Elina Yli-Rantala1, Essi Sarlin1
1Tampere University, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 589, FI-33014, Finland.
Journal of hazardous materials
|March 26, 2025
概括
无氧消化将微塑料集中在污水污泥固体中,只有1%的微塑料流入液体部分. 拉曼光谱可以识别聚乙烯和聚烯,但难以识别聚胺.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
背景情况:
- 微塑料在废水处理过程中积聚在污水污泥中.
- 污泥通常通过无氧消化处理,并将其分成固体和液体部分.
- 了解微塑料在这些分量中的分布对于污泥管理至关重要.
研究的目的:
- 调查无氧消化器和固体液体分离过程中微塑料的发生情况.
- 评估无氧消化和样品制备对使用拉曼光谱学识别微塑料的影响.
- 为了确定微塑料在消化分量的命运.
主要方法:
- 在污水污泥和消化剂中量化微塑料 (>20微米).
- 在固体和液体消化分离物之间分析微塑料的分布.
- 对用于识别微塑料的拉曼光谱的评估,考虑到降解和有机物质的影响.
主要成果:
- 污水污泥和消化剂含有高度的微塑料 (分别为7600 ± 6800 和 7200 ± 1100 MP/g干重).
- 大约99%的微塑料在无氧消化和分离后被引导到固体部分.
- 低密度聚合物 (聚乙烯,聚烯) 主要存在于液体部分.
- 拉曼光谱允许高确定性识别聚乙烯和聚烯,但聚胺的识别受到光谱干扰的影响.
结论:
- 无氧消化稳定了污泥中的微塑料度.
- 固体-液体分离有效地将微塑料集中在消化物的固体部分中.
- 拉曼光谱是一种可靠的工具,用于识别消化污泥中的聚乙烯和聚烯等常见的微塑料,但对其他聚合物类型仍然存在挑战.
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