Occurrence of microplastics in the coastal marine environment: First observation on sediment of China
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Updated: Apr 6, 2026

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis
Published on: December 16, 2016
Qiongxuan Qiu1, Jinping Peng1, Xubiao Yu2
1Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 51006, China.
Abstract:
Microplastics in sediments from the Beibu Gulf and the coastline of China Sea were investigated to evaluate the occurrence and abundance of microplastics in China for the first time. Microplastics (<5mm) were taken from sediments by a flotation method. The number of microplastics was counted by a fluorescence microscope, an instrument that is rarely used in the detection of microplastics in sediments. This instrument led to results that were satisfactory. Compared with other sampled areas, microplastics were found in massive concentrations in China. Four types of microplastics, HDPE, PET, PE and PS, were identified. The results will provide useful background information for further investigations.
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