| Evaluation on potential ecological risk of heavy metals in soils of Jinghuiqu irrigation district of Shaanxi |
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| DOI：10.7606/j.issn.1000-7601.2010.06.39 |
| Key Words: heavy metal evaluation of potential ecological risk Jinghuiqu irrigation district of Shaanxi |
| Author Name | Affiliation | | YI Xiu | College of Environmental Science and Engineering, Chang'an University, Xi’an, Shaanxi 710054, China | | GU Xiaojing | Xi' an Research Institute of Enwironmental Protection, Xi'an, Shaanxi 710002, China | | HOU Yanqing | College of Environmental Science and Engineering, Chang'an University, Xi’an, Shaanxi 710054, China | | LIU Xiuhua | College of Environmental Science and Engineering, Chang'an University, Xi’an, Shaanxi 710054, China | | XIE Juan | College of Environmental Science and Engineering, Chang'an University, Xi’an, Shaanxi 710054, China |
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| Abstract: |
| On the basis of investigating current situation of heavy metals pollution in soil in Jinghuiqu imrigation dis-
trict of Shaanxi province, Hg, Cd, Cr, Pb, As, Cu and Zn are used as evaluation indicators, and soil quality of the imi-
gation district is evaluated by potential ecological risk indexes of heavy metals . The conclusions have been reached that the degree of ecological hazard of heavy metals in the soil of Jingyang, a part of the irrigation district, is at light level. Besides a few sampling sites with a moderate level , the other parts of the irrigation district have a light level of ecological hazard of heavy metals. Among the heavy metals, only E, of Cd and Hg is more than 40 and the degree of ecological haz-ard is at a moderate level, while that of the rest is at a light level . The order of pollution degree of seven heavy metals is Hg>Cd>As>Pb>Cu>Zn>Cr. The average potential ecological risk index of seven heavy metals is 133, which shows that the degree of ecological hazard is in a light level in the whole irrigation district . Comparing different compre-hensive evaluation methods of soil quality，Nemerow integrated polluted index and the potential ecological risk index has a high consistency, and the correlation reaches a highly sigificant level (R2=0.9313,P<0.01). |
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