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A field deployable imaging system for detecting microplastics in the aquatic environment
Summary
Researchers built a portable imaging system for detecting microplastics in water that can be deployed directly in the field rather than requiring laboratory analysis. The system uses a de-scattering algorithm to produce clear images even in turbid water conditions and can identify particles as small as 50 micrometers. This low-cost tool could make routine microplastic monitoring of rivers, lakes, and coastal waters much more practical and accessible.
Microplastic (MP) pollutants, which are widely distributed and resistant to decomposition, pose serious threats to both ecosystems and human health. Developing efficient, field deployable, and low-cost MP detection systems is of paramount importance for promoting sustainable development. In this work, we design an integrated imaging system for detecting MPs in various aquatic environments. To address the challenge of image degradation caused by scattering effects, a de-scattering algorithm based on synthetic polarization holography is proposed. Calibration results demonstrate a substantial enhancement in image contrast and spatial resolution. Furthermore, our imaging system enables simultaneous capture of amplitude, phase, and polarization information, which is advantageous for the quantification and identification of MPs. Consequently, this field deployable imaging system offers an efficient solution for realtime monitoring of MPs in turbid aquatic environments.