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https://www.selleckchem.com/products/paquinimod.html Green land is important carrier in cities. We investigated the effects of soil permeability improvement and purification of pollutants under different matrix composition amendments in Xixian New Area, Shaanxi Province. Six materials, including biochar, vermiculite, perlite, compost, polyacrylamide (PAM) and coir, were mixed with basic materials that were composed of soil and sand (volume ratio of 44), and then incubated for 30 days. We analyzed bulk density, saturated hydraulic conductivity, saturated moisture, and total nitrogen (TN), total phosphorus (TP), chemical oxygen demand (COD), copper (Cu), zinc (Zn), cadmium (Cd) concentrations in pollutants. For biochar and compost with volume ratio of 0.51.5 (1) and 11 (2), 1%PAM application had the best effect on soil permeability (including bulk density, saturated hydraulic conductivity, and saturated moisture). The effect purification of TN and COD was better under the condition of biochar and compost (1) with 0.5% PAM amendment than that with 1% PAM amendment. Under biochar and compost (1) with 1%PAM treatment, the adsorption rate of Zn, Cd, Cu was 99.9%, 99.7%, and 97.2%, respectively. In general, biochar and compost (volume ratio of 0.51.5) with 1% PAM could be recommended as the media of the sponge city green land in Xixian New Area.To investigate the characteristics of heavy metal pollution caused by traffic and its potential ecological risks, we measured the amount of metal elements in samples collected from a traffic trunk road in Lanzhou City with atomic absorption spectrophotometer. The single factor index method and potential ecological risk index method were used to evaluate the degree of pollution and potential ecological risks, and then the effects of heavy metal pollution on chlorophyll and calcium (Ca) contents in greening plants were analyzed. The results showed that the amount of heavy metals including chromium (Cr), manganese (Mn), zinc (Zn), copp

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