Study on Pollution Characteristics and Ecological Risks of Microplastics in Ningyuan River

• Published in: E3S web of conferences Vol. 406; p. 3015
• Main Authors: Qiao, Zhizhuang, Gao, Shengyuan, Ma, Yingkai
• Format: Journal Article
• Language: English
• Published: EDP Sciences 01.01.2023
• ISSN: 2267-1242; 2267-1242
• DOI: 10.1051/e3sconf/202340603015

A survey was conducted on the surface water samples of Ningyuan River in Hainan Province. The samples were collected through on-site filtration and concentration methods, and pretreated through oxidation digestion and density separation. The microplastics were statistically analyzed by confocal micro-Raman spectrometer, elucidating the abundance, type, particle size, and shape characteristics of the microplastics in the water samples. Seasonal differences were analyzed, and the main conclusions were as follows: microplastics were detected at all sampling points, with the abundance range of 66.67 items/m 3 to 1106.67 items/m 3 ; polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), and polystyrene (PS) are the main types of microplastics; 100-1000 μm is the main particle size distribution range; the proportion order of microplastics with different shapes is fiber> fragment> film> particle. In terms of spatial distribution, there are significant differences due to the influence of functional zones along the river banks, while in terms of seasonal distribution, there is no significant difference between dry and rainy seasons; The overall level of microplastic pollution belongs to a medium to low risk.