成都市近地表大气尘铅分布特征及源解析
Geophysical and Geochemical Exploration(2006)
Abstract
分析了成都市近地表大气尘样品铅及其同位素含量比的测定数据,铅含量变化范围为(119.76~1 327.42)×10-6,均值为374.51×10-6,统计标准偏差为273.36,变异系数为0.73,说明成都市近地表大气尘铅含量变化大。燃煤飞灰的放射性成因铅明显高于汽油和柴油,可作为鉴别大气尘铅来源的证据。铅同位素含量数据表明成都市近地表大气尘的铅污染是复合污染源所致,其中,相对清洁区污染以建筑扬尘为主,中度污染区是汽车尾气和扬尘的叠加作用,重污染区是燃煤飞灰汽车尾气和工业污染源的综合表征。
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Key words
lead pollution source,lead distribution characteristics,lead isotope abundance ratio,Chengdu,air dust near the ground surface
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