摘要
在长沙、株洲、湘潭地区系统采集积尘样品155件，研究表明：积尘形貌主要以片状及不规则粒状为主；矿物组成复杂，主要有长石、石英、白云母、方铅矿、赤铁矿、温石棉、菱镉矿及非自然的Pb2Al2O、Th5Ce5O1.82、C3H4BaO6等物质；研究区积尘中重金属Pb、Zn、Cu、Cr、Cd和Ni平均含员分别为926．36μg／g、1759．03μg／g、149．15μg／g、92．73μg／g、29．93μg／g和31.62μg／g，城区积尘中重金属元素明显高于近城区；积尘中17种多环芳烃均有显示，湘潭地区总体值高于长沙和株洲，苯并[a]芘含量为129～1827ng／g，均高于我国土壤自然背景值；积尘的Pb同位素分析表明积尘混合性好，来源复杂．
155 samples of accumulated dust have been collected systematically in Changsha, Zhuzhou and Xiangtan. The research results are as follows： accumulated dust is mostly schistie and irregular graininess, which mainly consists of feldspar, quartz, muscovite, galena, hematite, chrysotilite, otavite and non-natural substances, such as Pb2 Al2 O, Th5 Ce5 O1. 82, C3 H4 BaO6 and so on. The average contents of Pb,Zn,Cu,Cr,Cd and Ni in the accumula- ted dust in this area are 926.36 μg/g,1 759. 03μg/g,t49.15 μg/g,92.73 μg/g,29.93 μg/g and 31.62 μg/g respectively. The contents of heavy metal elements in accumulated dust in the urban area are obviously higher than that in the nearby parts of the urban area. There exist 17 kinds of polycyclic aromatic hydrocarbon in accumulated dust with the contents of B（a）P between 129 ng/g and 1 827 ng/g and the overall value in Xiangtan is higher than that in Changsha and Zhuzhou. All these values are higher than the natural background value of the soil in our country. The Pb isotope analysis of accumulated dust reveals that the accumulated dust is of various origins with good miscibility.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2008年第4期106-111,共6页
Natural Science Journal of Xiangtan University
基金
湖南省洞庭湖区生态地球化学调查子课题(1212010310304)
关键词
积尘
地球化学特征
长沙
株洲
湘潭地区
accumulated dust
geochemistry feature
Changsha, Zhuzhou and Xiangtan
