Title : Microplastics in marine environments: Raman identification and characterization
Abstract:
Over the past decade, numerous studies have extensively examined the issue of plastic waste accumulation in marine environments. Of growing concern is the widespread dissemination of microscopic plastic particles, posing a significant threat to marine life. Plastic debris undergoes mechanical and biological degradation, leading to the formation of microplastics, defined as particles smaller than 5 mm. The identification and quantification of microplastics present a formidable challenge due to their minute size and complex composition. Raman microscopy emerges as an indispensable tool for analyzing extremely small microplastics (<20 um). As per the World Health Organization's guidelines, plastic particles smaller than 150 μm have the potential to enter the human body, raising health concerns. Given their diminutive dimensions, microplastics may be ingested by marine fauna, with uncertain ramifications for their health. In this study, Microplastics (MPs) extracted from jellyfish and Ctenophora were analysed using Raman spectroscopy. The spectra were successfully distinguished through a combination of available databases and a spectral reference database of MPs established in-house. In this study, the primary MPs identified were Polyethylene (PE) and Polyethylene Terephthalate (PET). PE, being one of the most used plastics, emerged as the predominant type. PET, another prevalent plastic, was also notably present among the microplastic samples analysed. Many of the Microplastics (MPs) exhibit significant degradation and alteration, posing challenges for their analysis and identification. Therefore, there is a pressing need for more in-depth studies and comprehensive databases to effectively address these complexities. Furthermore, considering the challenges posed by the degradation and modification of microplastics, uniformity and harmonization of experimental conditions become even more imperative. Consistent methodologies not only aid in overcoming analytical complexities but also contribute to the reliability and compatibility of data collected. By ensuring standardization across studies, researchers can build comprehensive databases that serve as invaluable resources for tackling the issue of microplastic pollution effectively.
Audience Take Away Notes
- Identification and characterizations of microplastics
- Application of Raman spectroscopy in microplastics analysis
- Practical applications on real samples
