Due to the impact of COVID-19, the use of plastics is increasing and the problem of microplastics is growing around the world. Accordingly, many researchers are doing a lot of research on microplastics, and they are found in microplastics in the ocean, freshwater, air, and food. However, data on the distribution of microplastics, analysis methods, prediction methods, toxicity, and removal methods are lacking. The distribution of microplastics requires more data on oceans, air, water, soil, and food. FTIR-Microscope, Raman, Nile Red, and py-GC/MS are widely used for the analysis method of microplastics, but a clearer analysis method is needed because the analysis method is not internationally standardized. Research on microplastic prediction and modeling is not progressing much at present, so more research is needed. The toxicity of microplastics requires a clearer investigation into the harmfulness of plastic additives (BPA, PCB, PAHs, etc), heavy metals, and organic pollutants. There are many studies on microplastic removal technology, but there is no clear empirical data, so a clear study is needed.

Overall, the special issue aims to explore microplastics-related distribution, analytical techniques, modeling, toxicity and removal techniques. And unless plastic waste is reduced, the impact of microplastics on the human body is sure to expand. Therefore, international standards for microplastic distribution, analytical techniques, toxicity, modeling and removal techniques must be addressed promptly.