Microplastic concentrations in surface waters of Dau Tieng and Tri an reservoirs

Microplastic (300-5000µm) concentrations were measured in the Dau Tieng reservoir of Tay Ninh province at three sampling sites and in the Tri An reservoir of Dong Nai province, at five sampling sites, in April 2021 (dry season) and in October 2021 (rainy season). Microplastic were sampled using a 80µm mesh size net from a local boat. The samples were extracted in the laboratory using enzymatic digestion, NaCl density separation and were filtrated on GF-A filter. Then microplastic were observed on stereomicroscope and length, area, color were measured for fragments, line and circle. Concentrations are given in total microplastic per m3, fragment per m3 and fibers per m3.