From celebration to contamination: Analysing microplastics released by burst balloons

Air balloons are a ubiquitous presence in our daily lives, and their rupture may release a substantial quantity of debris, as investigated herein. We employ Raman imaging to capture the fragments resulting from balloon explosions, enabling the identification and direct visualisation of minute microplastic particles with an improved signal-to-noise ratio for precise quantification. To circumvent the generation of misleading confocal Raman images, we recommend employing terrain mapping to scan the three-dimensional surface of the sample. It is important to acknowledge that the analysis of microplastics at the micro-scale inherently poses limitations in terms of throughput, as it necessitates a trade-off between low and high magnifications. We conduct explosive experiments on ten-to-hundred balloons, collecting debris from various angles and positions. Our investigation involves the random testing of multiple samples / sample positions at the micro-scale, with subsequent extrapolation to estimate the total amount of microplastics. The amalgamation of these results through statistical analysis indicates that each balloon explosion can potentially release tens-to-thousands of microplastics, highlighting a concern that has hitherto received insufficient attention. The characterisation approach, particularly the random Raman scanning method in combination with SEM and statistical analysis on accumulated sample, employed in this report has the potential to serve as a useful tool in future research on microplastics and even nanoplastics. This study reveals a previously underestimated environmental concern: the release of microplastics from burst air balloons, a common presence in our daily lives. We employ advanced Raman imaging to enhance microplastic detection, using a scanning hyperspectral matrix that significantly improves accuracy. Through extensive experiments and statistical analysis, we estimate that each balloon explosion can release tens to thousands of microplastic particles. This finding highlights the significant impact of balloon-related microplastic pollution, underscoring the need for greater attention to this pressing environmental issue. Our methods offer valuable tools for future microplastics and nanoplastics research, aiding our understanding of their environmental implications.