作　　者： ; ; ;

机构地区： 中南大学地学与环境工程学院

出　　处： 《地球科学与环境学报》 2006年第4期87-91,共5页

摘　　要： 利用WYX-402A型原子吸收分光光度计和Tessler形态分类法研究了Cu、Pb、Zn、Cd、Cr、As重金属在不同粒径PM10中的质量浓度与形态分布。结果表明Cu、Pb、Cd、As质量浓度随粒径增加而减少，Zn、Cr质量浓度在1.1～2．0μm粒径范围内有一峰值，总体上仍表现为随粒径增加而减少。重金属的形态分布表现出各自的特征，反映了其环境活性的不同。颗粒越细，Cu的活性越大；Pb的活性在各粒级中变化不大；Zn的活性随粒径增加而变大；Cd主要以碳酸盐结合态和氧化物结合态为主，且在小颗粒中活性较大；Cr以氧化物结合态和不溶物为主，在各粒级中含量较稳定，环境活性不大；As主要以前3种形态存在，在稳定环境下，其活性随粒径增加而减小。 The WYX-402A atomic absorption spectrometry and Tessler scheme are used to study contents and activity of Cu, Pb, Zn, Cd, Cr and As in PM10 of different diameters. The results indicate that contents of Cu, Pb, C.d and As increase with the decrease of diarneters; contents of Zn and Cr increase with decrease of diameters in despite of the maximum within the diameter range 1.1μm to 2.0μm. The activity of heavy metals is different in PM10, that is, activity of Cu increase with the decrease of diameters, activity of Pb is stable, activity of Zn fall when diameters decrease. The dominant form of Cd is carbonate and oxides and its activity is bigger in fine particles. The dominant form of Cr is oxides and residual, and its activity is stable in particles of different size. Soluble, carbonate and oxides are the main form of As, and its activity fall when diameters increase in the stable environment.

关 键 词： 重金属 质量浓度 形态分布 环境活性

领　　域： [环境科学与工程]