Journal
MARINE POLLUTION BULLETIN
Volume 171, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2021.112749
Keywords
Microplastics; Quantification; Characterization; Image analysis; Mass estimation; Methodology
Funding
- Environmental Research and Technology Development Fund [JPMEERF18S20208]
- Ministry of the Environment, Japan
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The study evaluated the shape of microplastics and verified the accuracy of mass estimation based on 3D models. The optimization of mass estimation methods may improve the reliability of microplastic evaluation.
As microplastics may bring about adverse effects on living organisms, it is important to establish more precise quantification approaches to better understand their dynamics. One method to determine the concentration of microplastics is to estimate their mass using three-dimensional (3D) models, but its accuracy is not well known. In this study, we evaluated the shape of the particles and verified the accuracy of a 3D model-based mass estimation using samples from a tidal flat facing Tokyo Bay. The particle shape evaluation suggested that the microplastics were flat and irregular in shape; based on these data, we created two types of models to estimate their mass. As a result, an accuracy of mass estimation by our model was higher than other models that consider the slenderness and flatness of particles. The optimization of mass estimation methods based on 3D models may improve the reliability of microplastic evaluation in monitoring studies.
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