Spatial Distribution Characteristics And Potential Ecological Risk Assessment Of Microplastics In Suspended Atmosphere In Harbin

Microplastics（MPs）refers to plastic particles with a large ratio of surface area and strong adsorption in the environment with mechanical grinding and optical chemical degradation in the environment.As an emerging pollutant,MPs has been detected in different types of environmental units including water,soil,sediment,and atmosphere.Among them,the MPs with air as the carrier,that is,the suspended atmosphere microplastics（SAMPs）has been identified as an important contributor to aquatic and soil environmental pollution.Adsorptions have pose a certain threat to the ecological environment and even human health.Therefore,the distribution and impact of SAMPs in the environment have become academic hotspots at home and abroad in recent years.This article conducts research around 8 urban areas in Harbin.Based on SAMPs-based spatial distribution characteristics,traceability analysis and potential ecological risk assessment are carried out.The following conclusions are obtained:Based on SAMPs abundance,shape,particle size,color,and polymer composition parameters,the use of anti-distance weighted interpolations can be used to obtain the spatial distribution characteristics of SAMPs:SAMPs is common in the urban area of Harbin,with an average abundance of 1.76 n·m^-3.The highest level of construction land is the highest,and the average number of SAMPs in the forest land is the least;the fiber shape is the main form of SAMPs.Except for cultivated land,the remaining surface surfaces are similar;in terms of particle size,except for forest land and grassland,the remaining pad surfaces are less than 35μm than 35μm.The main SAMPs is mainly,35μm may be the suspended critical value of MPs;affected by UV light,transparent colors are the advantages of each underlying surface SAMPs;Polypropylene（PP）,Polyzhexyl glycol（PET）（PET）Polyethylene（PE）is the main polymer type of 6 under-pad surfaces.According to the SAMPs polymer data indicators,Positive Matrix Factorization（PMF）model is used to calculate the use of non-negative constraint parameter algorithms to establish 5 categories of SAMPs sources（living sources,construction sources,transportation sources,transportation sources,transportation sources,transportation sources in Harbin City.Source,industrial,agricultural sources）.Through the analysis of the source,it is found that the SAMPs of construction land is mainly derived from the source of life and the source of construction;the agricultural sources contribute the most to the cultivated land SAMPs;the unused land SAMPs is mostly affected by the source of life and transportation;Forest SAMPs is less affected by industrial sources.Based on the toxic coefficient of SAMPs polymers,the potential ecological risk index(Potential Ecological Risk Index（RI）model（RI）model calculation,according to Harbin’s different under-pad SAMPs RI index,found that the ecological risks of the The ecological risk in the Harbin study area was low,the comprehensive potential ecological risk index was 16.59,and the risk level was evaluated as Minor.;the high-value zone of the single potential ecological risk of SAMPs is closely related to human activities;The RI value,the result is manifested by the construction land（34.95）>Unused land（19.07）>Cultivation Land（16.23）>Water（12.96）>Grassland（9.12）>Forest Land（7.20）.According to the above studies,this article fully reveals the universality of SAMPs and draws the distribution,source conditions and single and comprehensive potential ecological risk indexs of SAMPs in different atmospheric environments.The research aims to lay the scientific data foundation for the search for SAMPs environmental behavior and risk prevention and control model.