描述室内空气中的微塑料:对空气过器样本的拉曼成像分析的见解
Cheng Fang1, Olalekan Simon Awoyemi2, Gopalan Saianand1
1Global Centre for Environmental Remediation (GCER), University of Newcastle, Callaghan, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), University of Newcastle, Callaghan, NSW 2308, Australia.
Journal of hazardous materials
|November 13, 2023
概括
室内空气过器积累了大量的微塑料,拉曼成像识别了聚乙烯四甲酸盐 (PET) 纤维. 空气过器可以监测室内空气质量,突出显示人类每日接触微塑料污染的情况.
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:
- 微塑料污染是一个普遍的问题,室内空气对人类构成直接暴露途径.
- 在室内空气过器等复杂矩阵中的微塑料的特征仍然是一个重要的分析挑战.
- 在家用电器中积累的微塑料突显了它们作为潜在的微塑料沉降器的作用.
研究的目的:
- 开发和应用一种用于室内空气过器中微塑料的直接识别和量化方法.
- 评估空气过器作为监测室内微塑料污染指标的潜力.
- 调查室内环境中存在的微塑料的类型和数量.
主要方法:
- 从空调和个人电脑收集和准备空气过器样本.
- 使用拉曼成像技术直接,同时识别和可视化聚乙烯二甲 (PET) 纤维.
- 与扫描电子显微镜 (SEM) 进行交叉验证,并进行量化统计分析以避免偏差.
主要成果:
- 聚乙烯二甲 (PET) 纤维使用拉曼成像成功识别和可视化.
- 微塑料量化显示,在六个月的时间里,每个过器估计有73-88,000根纤维.
- 微塑料的丰富程度因室内环境而异,这证实了空气过器作为潜在的监测工具.
结论:
- 拉曼成像为空气过器中微塑料的特征提供了一种有效的方法.
- 空气过器作为评估室内空气质量的有价值指标,用于评估微塑料污染.
- 人类日常接触室内微塑料需要进一步的研究和对环境的关注.
相关概念视频
01:20Raman Spectroscopy: Overview
416
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
416
01:26Raman Spectroscopy Instrumentation: Overview
431
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
431