Detection of microplastic release into water from plastic containers based on lensless digital holography

Abstract

This study effectively analyzed the impact of microplastic release. Plastic containers are widely used in the food delivery industry, but the released microplastic particles can pose a threat to human health and the environment. The study employs lensless digital holography, which utilizes the principles of near-field light scattering and optical interference to rapidly detect microplastic particles. By adjusting the reconstruction distance, the technique can differentiate microplastic particles from other impurities, achieving precise detection and analysis of microplastic particles. The results showed that the release of microplastic particles from plastic bags at room temperature was about 5.25 times that of plastic boxes. In the experiment of releasing microplastics from plastic boxes, the increase was 1158.82% after heating for 60 seconds, 132.48% after three heating cycles, 141.18% after refrigeration, and 21.37% after refrigeration before heating. This study reveals the release of microplastics under different treatment conditions, providing a reliable basis for reducing the harm of microplastics.