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Efeito dos microplásticos no comportamento ambiental de contaminantes emergentes em matrizes aquáticas
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This Brazilian study evaluated the efficiency of FTIR spectroscopy, Raman spectroscopy, carbon elemental analysis coupled with mass spectrometry, and scanning electron microscopy with energy dispersive X-ray spectrometry for characterizing virgin and artificially aged polyethylene and polypropylene microplastics. The work discusses the strengths and limitations of each technique for detailed chemical characterization, including assessment of degradation stage, to inform standardized analytical protocols for environmental microplastic samples.
Many studies have reported the occurrence of microplastics in different environmental compartments, through the description of their morphological characteristics and chemical identification obtained mainly by spectroscopic techniques.However, the scientific community is still lacking the implementation of standardized analytical methods that aim to assess not only the identification of the particle, but also its stage of degradation.It is understood that this information would be extremely useful in helping to elucidate the main sources of pollution and contributing to strategies and mitigating measures for the management of solid waste and microplastics in the environment.In this respect, the aim of this study was to evaluate the efficiency of Fourier-transform infrared spectroscopy, Raman spectroscopy, carbon elemental analysis coupled with mass spectrometry, and scanning electron microscopy with energy dispersive X-ray spectrometry for the characterization of virgin and aged polyethylene and polypropylene microplastics samples.The degraded samples were subjected to accelerated aging in a QUV chamber in accordance with ASTM G-154.This work discusses the efficiency and limitations of each technique for the detailed chemical characterization of microplastic samples collected from the environment.
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