Occurrence Characteristics and Sources of Microplastics in Sediments at Different Depths in Yangzong Lake
To investigate the pollution characteristics and sources of microplastics in sediments of dif-ferent depths in Yangzong Lake,in June 2022 short drills of 30 cm of sediment were collected from 8 sampling points in Yangzong Lake using a gravity sampler,and microplastics in the sediments were separated by density flotation,and the physical and chemical characteristics of the microplastics were examined by using stereomicroscope and Raman spectrometer.The results showed that the average a-bundance of microplastics in 0～10 cm,10～20 cm and 20～30 cm sediments in Yangzong Lake was(782.11±313.97),(188.68±52.95)n/kg and(148.32±68.34)n/kg.The overall average abundance was(373.04±345.39)n/kg,and the abundance decreases with depth.The shape of microplastics is mainly fibrous,and the color is blue and transparent.Furthermore,the particle size is mainly concentrated be-low 2 mm.The main polymer components were polyethylene(PE)and polyvinyl chloride(PVC).Fishing nets and textiles are probably the main sources of microplastics by combining with the characteristics of microplastics and surrounding human activities.
万方数据
维普
