摘要
用多晶X-射线衍射法对淄博市中心城区逐月采集的大气降尘矿物组成及其含量进行了分析。研究结果表明:淄博市大气降尘的矿物组合比较稳定,降尘中以源于自然成因的石英、长石和粘土质矿物为主,质量分数变化范围为59.1%～95.1%。降尘中的石膏和方解石与大气化学反应有关,其中石膏质量分数为36.3%～1.0%,反映了大气SO2污染具有明显的时间性特征。降尘中的赤铁矿源于高温工业活动,含量变化幅度最小。气象因素可能是导致降尘中石膏含量变化的主要原因,降尘中石膏含量的变化是大气酸污染程度的重要矿物指示剂。
Mineral components of atmospheric fine dust of Zibo City have been investigated using XRD technique qualitatively and semi-quantitatively.The results showed that the mineral assemblages of the dusts keep stable.Quartz,albite and clay minerals,which originated from geological sources,amounted to 59.1%-95.1% weight percent in the dust.Gypsum and calcite dust in the atmospheric chemical reactions related,amounted to 36.3%-1.0% weight percent in the dust,indicating the air pollution of SO2 changed with time.The weight percent of hematite in the dust varies least.Meteorologic character may be the main reason for the different contents of gypsum in the dust.The present study shows that the mineral assemblages and gypsum content in atmospheric fine dust could be used to monitor acidic air pollution intensity.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2010年第6期1429-1434,共6页
Journal of Jilin University：Earth Science Edition
基金
教育部科学技术研究重点项目(205089)
关键词
淄博市
大气降尘
矿物组合
大气
环境
Zibo City； atmospheric fine dust； mineral assemblages； atmospherics； environment
