Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, Peoples' Republic of China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Fudan University, Shanghai 200433, Peoples' Republic of China.
Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, Peoples' Republic of China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Fudan University, Shanghai 200433, Peoples' Republic of China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, Peoples' Republic of China.
J Hazard Mater. 2024 Jan 15;462:132702. doi: 10.1016/j.jhazmat.2023.132702. Epub 2023 Oct 4.
Plastic pollution represents a pressing global environmental issue, with microplastics (MPs) and nanoplastics (NPs) being ubiquitously found in both food and the environment. However, the investigation of NPs has been hampered by limited detection technologies, necessitating the development of advanced techniques. This study introduces a sol-based surface-enhanced Raman spectroscopy (SERS) approach for the swift detection of MPs and NPs in aqueous environment. By leveraging the aggregation effect between silver nanoparticles (Ag nanoparticles) and plastic particles, the plastic Raman signals is significantly enhanced, effectively lowering the detection limit. Utilizing Ag nanoparticles, plastic particles as small as 20 nm were detected in liquid samples, with a detection limit of 0.0005%. With the developed method, nanoplastic particles in seafood packaging samples were successfully tested, with concentration found to be at μg/L level. This method offers a rapid, economical, and convenient means of detecting and identifying MPs and NPs. The sensitivity of the method allows for capturing plastic signals within 2 min, making it valuable for aquatic environment contamination detection. SERS technology also holds promise for rapid plastic solution detection, potentially becoming a fast detection method for food safety.
塑料污染是一个紧迫的全球环境问题，微塑料（MPs）和纳米塑料（NPs）广泛存在于食品和环境中。然而，由于有限的检测技术，对 NPs 的研究受到了阻碍，因此需要开发先进的技术。本研究提出了一种基于溶胶的表面增强拉曼光谱（SERS）方法，用于快速检测水环境中的 MPs 和 NPs。通过利用银纳米粒子（Ag 纳米粒子）和塑料粒子之间的聚集效应，显著增强了塑料拉曼信号，有效降低了检测限。利用 Ag 纳米粒子，在液体样品中检测到了小至 20nm 的塑料颗粒，检测限为 0.0005%。利用所开发的方法，成功检测了海鲜包装样品中的纳米塑料颗粒，浓度在μg/L 水平。该方法提供了一种快速、经济、便捷的检测和识别 MPs 和 NPs 的方法。该方法的灵敏度允许在 2 分钟内捕获塑料信号，使其成为水环境污染检测的有价值工具。SERS 技术也有望用于快速检测塑料溶液，可能成为食品安全的快速检测方法。
