Distribution Model and Geochemical Characteristics of the Elements in the Surface Sediments of Liangzi Lake

The distribution model and geochemical characteristics of elements in the surface sediments can indicate the sources of the sediments and show the informaton of heavy metal element easily impacted by human.The major and trace elements concentrations were analysed by AFS and ICP-AES.In this study,the results of data analysis by multivariate statistical analysis show that the major elements in sediments of Liangzi Lake are affected by the physical and chemical factors of the water body.The trace elements are relatively lower except Zr and Nb.Most of heavy metal elements contents in the studied lake were found closed to the sediments background value of Wuhan,Europe and America,but lower than those of its adjacent East Lake and Tangxun Lake which are affected by human easily.In Liangzi Lake,most elements have an obvious horizontal distribution model,K2O,CaO,Na2O,MgO,Al2O3,Fe2O3,Li,Rb,Mn,Se,Ni and Sc are riched in northeast and east part of the lake,with SiO2 enriched in southwest,and Zr and Hg enriched in the middle part.This distribution model may be attributed to the sedimentation and the geological background of the mines in the east of the lake.