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 

作者机构：School of Human Settlement and Civil EngineeringXi’an JiaoTong UniversityXi’an 710049China The Institute of Environment and ReproductionDepartment of UrologyThe Fourth Military Medical UniversityXi’an 710038China Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710075China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2009年第52卷第4期

页      面：504-510页

核心收录：

学科分类：07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

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

主　　题：Xi’an tree rings element concentration environmental contaminants 

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.