东北老工业基地不同土地利用类型土壤重金属污染特点

以东北老工业基地北部城市群为例,对其重点区域及周边的不同土地利用类型中Hg,Pb,Cr,Zn4种元素进行测定分析,利用单因子污染评价和多因子污染评价方法进行评价。结果表明,4种元素在不同利用类型土壤中,汞和铅在土壤中的迁移能力较弱,且汞元素在土壤中积累程度不高,只是在个别区域其含量有所波动;铅在农田和工业用地土壤中都有一定的积累,但向其他利用类型土壤的迁移效果不明显;铬在个别区域的旱田,蔬菜地中的积累略高,并迁移威胁到了其周围的林地土壤;锌在某些地区的工业用地,旱田,蔬菜地的污染程度相比其他几种元素污染更为严重。

The Different Land-use Types Characteristics of Heavy Metals Pollution in China's Northeastern Old Industrial Base

The contents of heavy metals （Hg, Pb, Cr,Zn）in different land -use types soil form the focus and the Surrounding area of China＇s Northeastern Old Industrial Base were analyzed. Moreover,evaluate them with Single factor evaluation and multi - factor evaluation methds. The results showed that the four kinds of elements in different land - use types soil, the movement ability of Hg and Pb is weak and the accumulative extent of Hg is not high in soil, the content may fluctuate only in a few region; Pb has a certain accumulation in arid areas,vegetables areas and industrial areas, but the movement effect is not obvions to otherland use types Soil ; Cr has a slightly high accumulative extent in a few arid areas and vegetables areas, and its movement threatens the ambient forest areas;Zn has more serious pollution compared with the other elements in some region suoh as industrial areas,arid areas and vegetables areas.