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OMCEC: A Novel Method for Simultaneous Detection of Composition, Geometry and Motion of Suspended Particles

Global NEST International Conference on Environmental Science & Technology 2022
Thu‐Ha Nguyen, Fiona H. M. Tang, Federico Maggi

Summary

Researchers developed a laboratory system called OMCEC that simultaneously measures the composition, shape, and movement of individual particles suspended in water, combining optical microscopy with spectral analysis and particle tracking. The system was demonstrated with biological aggregates and microplastic particles, offering a new tool for studying how plastics interact with organic matter in aquatic environments.

Here, we introduce OMCEC, a laboratory-based system that simultaneously measures the material composition, geometric properties, and motion of individual suspended aggregates in a non-invasive and non-destructive way. OMCEC consists of a full-color high-resolution optical system and real-time algorithms for material segmentation based on light spectra emission analysis, quantification of various geometrical properties, and motion detection with particle tracking velocimetry (PTV). We show applications of OMCEC for the composition analysis of aggregates made of biological matter and (i) mineral and (ii) microplastics.

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