Detection and sorting of microplastics in marine environment by new imaging tools

M. Paturzo; F. Merola; V. Bianco; P. Memmolo; L. Miccio; B. Mandracchia; P. Ferraro

doi:10.1117/12.2319400

7 September 2018 Detection and sorting of microplastics in marine environment by new imaging tools

M. Paturzo, F. Merola, V. Bianco, P. Memmolo, L. Miccio, B. Mandracchia, P. Ferraro

Proceedings Volume 10834, Speckle 2018: VII International Conference on Speckle Metrology; 108340Q (2018) https://doi.org/10.1117/12.2319400
Event: SPECKLE 2018: VII International Conference on Speckle Metrology, 2018, Janów Podlaski, Poland

Abstract

Digital holographic microscopy (DHM) has proved to be a powerful imaging tool for identifying, analysing and reconstructing the 3D shape of cells and small organisms in their natural environment. In fact, DHM has the advantage, compared to other imaging techniques, to be a non-intrusive, non-destructive and label-free method for in situ measurements. This makes holography the most suitable tool for underwater imaging, where many of the species under investigation are very fragile and can be damaged. In particular, we built up an optofluidic platform based on DHM able to perform such analysis in microfluidic environment, i.e. in dynamic conditions and also in case of a turbid medium. In this work, we take advantage of this technique to identify, sort and reconstruct the morphology of different classes of microplastics (e.g. PVC, PET, PP, etc.) dispersed in water, which are among the major pollutants in the ocean, and to provide an effective assessment of their abundance. By adopting special algorithms for numerical processing of the acquired images, we try to separate the plastics from other materials, such as organic debris (shell fragments, animals parts, diatoms, etc.) and other items (metal paint coatings, tar, glass, etc.).

Citation Download Citation

M. Paturzo, F. Merola, V. Bianco, P. Memmolo, L. Miccio, B. Mandracchia, and P. Ferraro "Detection and sorting of microplastics in marine environment by new imaging tools", Proc. SPIE 10834, Speckle 2018: VII International Conference on Speckle Metrology, 108340Q (7 September 2018); https://doi.org/10.1117/12.2319400

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KEYWORDS

Microscopes

Ocean optics

Water

Oceanography

Organisms

Digital holography

Holograms

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