Trace elements in tree rings and their environmental effects: A case study in Xi’an City  

作　　者：LIU Yu TA WeiYuan BAO TingYi YANG ZengYue SONG HuiMing LIU Na WANG WeiPing ZHANG HongYi ZHANG Wei AN ZhiSheng 

机构地区：[1]School of Human Settlement and Civil Engineering,Xi’an JiaoTong University,Xi’an 710049,China [2]The Institute of Environment and Reproduction,Department of Urology,The Fourth Military Medical University,Xi’an 710038,China [3]Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075,China

出　　处：《Science China Earth Sciences》2009年第4期504-510,共7页中国科学（地球科学英文版）

基　　金：Supported by National Natural Science of China (Grant Nos. 40525004, 40121303);National Basic Peasearch Program of China (Grant No. 2004CB720200)

摘　　要：Using wet digested method and ICP mass spectrometer, we analyzed the concentration of five trace elements (Cd, Mn, P, Zn and Pb) for the tree rings from both urban and suburbs of Xi'an. At the urban sampling site, one Chinese mahogany (Toona sinensis) disc and one phoenix tree (Firmiana simplex) disc were sampled from a steelworks in Xi'an City. At the suburb site, a Chinese mahogany disc was collected from a village in the south of the City. In addition, some soils near the roots of the sampled trees were collected. The analysis results indicate that the concentration of each of the five elements in annual rings has a positive correlation with the production of the steelworks. Statistical calculations show that Pb and Mn elements were stable without lag effects. That means these two elements do not move between rings. Cd displayed one year moving, P two years and Zn three years. These results are quite similar to those found by other methods.Using wet digested method and ICP mass spectrometer, we analyzed the concentration of five trace elements (Cd, Mn, P, Zn and Pb) for the tree rings from both urban and suburbs of Xi’an. At the urban sampling site, one Chinese mahogany (Toona sinensis) disc and one phoenix tree (Firmiana simplex) disc were sampled from a steelworks in Xi’an City. At the suburb site, a Chinese mahogany disc was collected from a village in the south of the City. In addition, some soils near the roots of the sampled trees were collected. The analysis results indicate that the concentration of each of the five elements in annual rings has a positive correlation with the production of the steelworks. Statistical calculations show that Pb and Mn elements were stable without lag effects. That means these two elements do not move between rings. Cd displayed one year moving, P two years and Zn three years. These results are quite similar to those found by other methods.

关 键 词：Xi’an TREE RINGS element CONCENTRATION environmental CONTAMINANTS 

分 类 号：X173[环境科学与工程—环境科学]