| Autor: |
Wang F; Provincial Eco-Environmental Engineering Evaluation Center, Hubei Institute of Eco-Environmental Sciences, Wuhan 430070, China., Gong W; Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.; University of Chinese Academy of Sciences, Beijing 100049, China., Liu Z; Provincial Eco-Environmental Engineering Evaluation Center, Hubei Institute of Eco-Environmental Sciences, Wuhan 430070, China., Zhu CN; Provincial Eco-Environmental Engineering Evaluation Center, Hubei Institute of Eco-Environmental Sciences, Wuhan 430070, China., Zhang RQ; Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China., Li ZG; Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.; Danjiangkou Wetland Ecosystem Field Research Station of Hubei Province, Chinese Academy of Sciences, Wuhan 430074, China., Liu Y; Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.; Danjiangkou Wetland Ecosystem Field Research Station of Hubei Province, Chinese Academy of Sciences, Wuhan 430074, China. |
| Abstrakt: |
To explore the occurrence characteristics and influencing factors of microplastics in soil in the Danjiangkou Reservoir area, this study collected soil samples from orchards, dryland, paddy fields, and wetland and identified microplastics in soil via density sorting, microscope observation, and Raman spectrometry. The results showed that microplastics were detected in 64 samples collected in the study area, and the abundance ranged from 645 to 15161 n·kg -1 . The spatial distribution of microplastics in the bottom of the reservoir was higher than those in the middle and head of the reservoir, and the abundance of microplastics in the surface soil(0-20 cm) was significantly lower than that in the bottom soil(20-40 cm). The main types of microplastics were polypropylene(26.4%) and polyamide(20.2%), the particle size was mainly concentrated between 50-500 μm(75%), and the common shape was fragments(66.2%). Correlation analysis showed that soil microplastic abundance was closely related to land use, distance from water and housing, population density, and soil properties. From the perspective of microplastic pollution risk, 72.1% of the region's microplastic polymer risk index was at level Ⅲ and level Ⅳ, and there was a certain risk of microplastic pollution in the Danjiangkou Reservoir area. The results of this study can provide support for risk assessment of microplastics. |
