Advanced Optical Imaging Technologies for Microplastics Identification: Progress and Challenges

IF 3.7 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Advanced Photonics Research Pub Date : 2024-07-22 DOI:10.1002/adpr.202400038
Yanmin Zhu, Yuxing Li, Jianqing Huang, Yunping Zhang, Yuen-Wa Ho, James Kar-Hei Fang, Edmund Y. Lam
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Abstract

Global concern about microplastic (MP) and nanoplastic (NP) particles is continuously rising with their proliferation worldwide. Effective identification methods for MP and NP pollution monitoring are highly needed, but due to different requirements and technical challenges, much of the work is still in progress. Herein, the advanced optical imaging systems that are successfully applied or have the potential for MP identification are focused on. Compared with chemical and thermal analyses, optical methods have the unique advantages of being nondestructive and noncontact and allow fast detection without complex sample preprocessing. Furthermore, they are capable of revealing the morphology, anisotropy, and material characteristics of MP for their quick and robust detection. This review aims to present a comprehensive discussion of the relevant optical imaging systems, emphasizing their operating principles, strengths, and drawbacks. Multiple comparisons and analyses among these technologies are conducted in order to provide practical guidelines for researchers. In addition, the combination of optical and other alternative technologies is described and the representative portable MP detection devices are highlighted. Together, they shed light on the prospects for long-term MP pollution monitoring and environmental protection.

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用于识别微塑料的先进光学成像技术:进展与挑战
随着微塑料(MP)和纳米塑料(NP)颗粒在全球范围内的扩散,全球对它们的关注度不断上升。监测 MP 和 NP 污染亟需有效的识别方法,但由于要求和技术难度不同,许多工作仍在进行中。在此,将重点介绍已成功应用于或有潜力应用于 MP 识别的先进光学成像系统。与化学分析和热分析相比,光学方法具有无损、非接触、无需复杂样品预处理即可快速检测等独特优势。此外,它们还能揭示 MP 的形态、各向异性和材料特性,从而实现快速、可靠的检测。本综述旨在全面讨论相关的光学成像系统,强调其工作原理、优点和缺点。对这些技术进行了多方面的比较和分析,以便为研究人员提供实用的指导。此外,还介绍了光学技术与其他替代技术的结合,并重点介绍了具有代表性的便携式 MP 检测设备。它们共同揭示了长期 MP 污染监测和环境保护的前景。
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