摘要
This study is devoted to a tributary of the Xiaojiang Water-level-fluctuating Zone, which is located in the center of the Three-Gorges Reservoir area. By field sampling and laboratory analysis, this paper studied the heavy metal Zn in soil of this area and the speciation characteristics of its chemical form, and by using the correlational analysis method and stepwise method, the paper also discussed the factors affecting the chemical forms of the heavy metal. It is shown that the total contents, the acid soluble fraction, the reducible fraction, the oxidizable fraction and the residual fraction of Zn in the area are respectively 126.03 mg·kg-1, 3.60 mg·kg-1, 5.44 mg·kg-1, 10.59 mg·kg-1 and 106.40 mg·kg-1 on average, respectively.