Đánh giá ban đầu về ô nhiễm vi nhựa trong trầm tích bãi biển và nước bề mặt ở khu vực ven bờ thành phố Quy Nhơn

Abstract

The study was carried out to assess microplastic contamination in surface waters and beach sediments around the coastal areas of Quy Nhon city. The water and sediment samples were collected at 4 sites along Quy Nhon beach for analysis. The water samples were treated by SDS, Biozym ES, Biozym F and H2O2 30% while sediments were only treated by H2O2 30%. The results showed that the microplastic concentration in surface water was from 16.37 – 62.86 items/m3 with average of 30.32 items/m3 while this in sediments fluctuated in the range of 1700 – 3100 items/kg of dry sediment with average of 2400 items/kg of dry sediment. The domestic wastewaters from the city are considered as the major source causing microplastic contamination at study sites. The length of microfibers was mostly in the range of 300 – 2000 µm and the area of microfragments was dominant in the range of 45000 – 400000 µm2. Blue, white and purple were the dominant colors of microfibers, and white, yellow and blue were predominant for microfragments.