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Contents of Several Heavy Metals in Corn and Soils from a Boai Farm and Zhongmacun Coal Mine in Jiaozuo City,Henan Province

MA Guang,HE Xu-feng,HU Bin,WANG Fang(Institute of Resources & Environment,Henan Polytechnic University,Jiaozuo 454003,China)  
Contents of four heavy metals,Cu,Cr,Pb,Zn in corn and soils in a Boai farm and Zhongmacun coal mine in Jiaozuo were analyzed and evaluated.The results indicated that the heavy metals in the third plot was higher than the fourth in the farm,probably due to the outside impact,while Pb in corn samples collected from the third plot exceeded the official standard.Fortunately,the contents of the heavy metals for the rests were all under the official standard.Furthermore,the contents of heavy metals in whole soils taken from Zhongmacun coal mine were higher than that from Boai farm.Notably,the contents of Pb in corn samples were all less than the official standard.However,the contents of heavy metals in corn samples exhibited a climbing trend.
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