Ecological risk evaluation study of tire wear particles in sponge facilities
The paper took the Yuelai eco-city in Yubei district of Chongqing as the study area,selected and collected soil samples from existing typical sponge facilities,extracted TWP by density separation method,analyzed TWP in different types of sponge facilities qualitatively and quantitatively after extrac-tion,and analyzed the"sink"and"source"of TWP in sponge facilities for this experiment.The"sink"and"source"analysis of TWP in sponge facilities was conducted to assess the ecological release risk of TWP in different sponge facilities.The result showed that the sampling points of each sponge facility were currently at low risk level.The ecological risk indexed from high to low is parking lot＞rainwater catch-ment point＞sewer inlet＞bioretention zone＞rain garden.The ecological risk index of the parking lot was 31,and the ecological risk index of the sewer inlet,bioretention zone and rain garden were all less than 10.
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