Abstract:

In order to investigate and study the heavy metals’ pollution conditions of the vegetable field of south-eastern suburbs in Harbin, the author determined the heavy metal content in each of the soil sample Cu, Zn, Pb, Ni, Cd, Cr, As and Hg using flame atomic absorption spectrometry. Using the index of geoaccumulation law and potential ecological risk as well as Songnen plain background value ratio as a parameter, the author assessed the heavy metals in the vegetable field of south-eastern suburbs of Harbin. From the geological evaluation of the cumulative index results,the author concluded that the order of heavy metals pollution was Zn>Hg>Cd>Pb>Cu> Ni>Cr>As, Zn reached moderately pollution-strong pollution levels; in addition, the potential ecological risk index results showed that: Hg was the most serious elements of potential ecological risk, reaching the level of medium ecological risk, the other seven types of Cu, Pb, Zn, Ni, Cr, Cd were minor ecological risk, the integrated index of potential ecological risk RI was 169.565, it showed that heavy metal pollution had reached the middle of ecological damage. The results showed that: the vegetable field of south-eastern suburbs in Harbin had been polluted, the pollution level was intermediate, in medium ecological harm level.