| The author selected kindergartens and elementary schools as research objects, analyzed the characteristics of lead pollution in soils, dusts and particles in the air. The characteristic of adsorption and desorption of lead in soil and dust is studied. Furthermore, collected some other related materials, assessed the health risk of children in the conditions of lead exposure, provided the scientific basis for the city lead pollution management and the child health protection. Following conclusions were achieved:1. Accumulations of lead in soils, dusts and particles in the air existed in Nanjing city at difference levels, especially in dust. The level of lead pollution in dust is between 38.1mg/kg and 349.4mg/kg, and the average value is 134.14 mg/kg. The level of lead pollution in soil is between 22.65mg/kg and 117.18mg/kg, and the average value is 50.29 mg/kg. Obviously, the value of lead pollution in dusts is 2.7 times higher than that in the soils on average. Correlation of them is significant at the 0.01 level. Concentration of lead in particles in the air is higher at nights than that in the day, and the traffic pollution has important contributions to it.2. The concentration of lead adsorption and copper all presented different spatial distribution characteristic. The spatial distribution difference of lead content in the soil and dusts is bigger than that of copper.3. The characteristics of lead in soils and in dusts accord with Langmuir equation, correlative coefficient is 0.9987 and 0.9951. desorption ratio of lead in soils and dusts is higher in acid gastric solution than that in KNO3 solution.4. Health risk of lead exposure to children in urban district of Nanjing city has...
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