... 111Concentrations and chemical speciations of Cu, Zn,Pb and Cr of urban soils in Nanjing, ChinaYing Lua,b,*, Zitong Gonga, Ganlin Zhanga, Wolfgang BurghardtcaInstitute of Soil Science, Academia Sinica, ... Statistical Bureau and P.R. China, 2000). With continuing population growth and rapid economic develop-ment of China, the percentage of population living in cities is increasing dramatically and, consequently, ... Microelements in Soils of China. Jiangsu Sci. and Technol. Publishing House, Nanjing, China (in Chinese).Lu, Y.S., 1999. Environmental Evaluation. Tongji Univ. Press, Shanghai, China (in Chinese).Lu,...