| In this research, we collected 108 soil samples from four different vegetable fields in Enshi City. The contents of fourteen heavy metal elements including Cu, Zn, Ni, Cr, Pb, Cd, As, Mn, Co, Ba, V, Tl, Bi and Hg were detected by inductively coupled plasma mass spectrometry (ICP-MS). The compositive pollution effects and ecological risk in the four vegetable fields of the heavy metals were evaluated through the single factor index method, the Nemero synthesis index evaluation method and the Hakanson ecological risk index method. The results showed that the pollution of the vegetable fields in the survey region were attributed to a multi metals pollution by the Cd, Mn and Cu. The vegetable fields in Enshi City have been polluted by heavy metals based on the results of the analysis of the single factor index method and the Nemero synthesis index evaluation method. The Hakanson ecological risk index method pointed out that Enshi City was in considerable level potential ecological risk. The pertinence and source of 14 mental elements have been researched and analysed. There were different sources to 14 metal elements in soils, Mn, Co and As were predominantly derived from parent materials, and others were affected by the exploitation of the minerals and the employment of resource product. |
