经测定,沈阳市土壤铅含量范围为22~2910.600mg/kg,平均值是270.297mg/kg。铅污染比较严重且空间变化大,局地污染非常严重。利用地统计方法研究了沈阳市土壤铅的空间结构和分布特征。结果显示,沈阳市土壤铅具有较好的空间结构性,利用半方差函数的结果进行克里格插值得到土壤铅含量的分布图。沈阳市有6个土壤铅污染中心,其中以铁西区和太原街的污染比较突出。工业排放、汽车尾气和污灌是沈阳市铅污染的三大污染源。风险评价结果表明,铁西区属于极高风险区,儿童铅中毒的潜在风险非常大。
The range of Pb in soils in Shenyang city was 22-2910.600mg/kg, with the average value of 270.297mg/kg, which was 7.72 times of reference value (35.001mg/kg). It was evident that Pb accumulated in soils. In addition difference distribution of Pb was obvious, and Pb pollution was serious in some areas in Shenyang city. Statistical analysis of lead contents in soils showed only the distribution characteristics in whole, not picturing the spatial correlation of lead in contaminated soils, and semivariogram ...