Comprehensive assessment of microplastics ecological risk in the Yangtze River Basin
A microplastics dataset containing 366 sampling sites in 43 cities in the Yangtze River Basin was established to explore the changes in the spatial distribution of microplastics.Based on the two-dimensional risk assessment matrix and Monte Carlo simulation,the absolute ecological risk of microplastics at each sampling point within the river basin and the relative ecological risk of microplastics of the whole river basin were evaluated,respectively,and the priority control areas and priority control factors of microplastics in the Yangtze River Basin were identified.The results showed that the mean microplastics abundance in the Yangtze River Basin was(2.52±11.60)×104 items/m3,and that human activities,such as production,consumption,and ship transport,as well as natural factors,such as topography may be the reasons for the uneven distribution of microplastics.The absolute ecological risk indexes of different cities in the Yangtze River Basin with sampling points ranged from 1 to 20,and the microplastics ecological risk of the Poyang Lake Basin and Taihu Lake Basin should be paid more attention.The relative ecological risk assessment based on Monte Carlo simulation showed that 90.8%of the microplastics pollution load risk was at low level,63.4%of the polymer hazardous risk was at high level,and 65.5%of the potential ecological risk was at low level in the river basin,with microplastics abundance,polyvinylchloride,and polyurethane having high ecological risk contributions.
microplasticstwo-dimensional risk assessment matrixMonte Carlo simulationecological riskYangtze River Basin
国家科技期刊平台
NSTL
万方数据
