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| The evaluation of heavy metals pollution in soil of eastern Qinghai |
| SHEN Xiao, JI Bing-Yan, TIAN Xing-Yuan, YAO Zhen |
| The Fifth Institute of Geology and Mineral Exploration, Qinghai Bureau of Geology and Mineral Resources, Xining 810028, China |
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Abstract According to the investigation of heavy metal content in topsoil and deep soil in the east of Qinghai, the authors used National Standard ( GB15618-1995) as the evaluation standard. The status of heavy metals in the soil was evaluated, and the situation of heavy metal pollution in Ganhetan was discussed by combining single soil samples, plant samples, water samples and geochemical sections. Two heavy metals (Cd, Hg) were selected to compare the situation of their pollution in different periods. The results indicate that the heavy metal pollution in eastern Qinghai is not serious, but some heavy metals such as Zn, Cd, Pb in Ganhetan have formed obvious circular pollution, and the pollution has reached deep soil. Agricultural development is not suitable in this area. It is found that the pollution of some heavy metals such as Cd has aggravated, whereas pollution of some heavy metals like Hg has been reduced.
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Received: 08 October 2013
Published: 10 December 2014
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