山东省临沂市烟田耕作层土壤重金属含量

采集山东省临沂市的100个典型烟田耕作层土壤样品,分析了其As、Cd、Cr、Hg和Pb全量,并与相应的国家限制值进行对比。结果表明:1临沂市典型烟田土壤中As、Cd、Cr、Hg和Pb含量分别为0.20~30.52、0.01~0.38、4.38~128.00、0~0.36和4.99~70.80 mg/kg,均低于相应的国家标准限制值,尚未发生重金属污染现象;23个p H级别中,As、Cd、Cr、Hg和Pb含量与对应的限制值的比值,最大值分别为76.3%、96.7%、85.3%、90.0%和88.5%,说明临沂市烟田面临着潜在的重金属污染威胁,必须继续严格控制烟田的重金属外源以确保烟田土壤质量安全。

Heavy Metal Contents in Plough Layers of Tobacco-planting Fields in Linyi City, Shandong Province

One hundred samples of typical tobacco plough layer in Linyi of Shandong province were collected, and the contents of As,Cd,Cr,Hg and Pb were determined. The result showed that heavy metal contents in Linyi soil were lower than limiting value of national standard. The contents of As,Cd,Cr,Hg and Pb were 0.20 ~ 30.52 mg/kg,0.01 ~ 0.38 mg/kg,4.38 ~ 128.00 mg/kg,0 ~ 0.36 mg/kg and 4.99 ~ 70.80 mg/kg. The contents of As,Cd,Cr,Hg,Pb and its limiting value were compared from three different pH levels, the biggest ratio was 76.3%,96.7%,85.3%,90.0% and 88.5%. The result showed that Linyi tobacco filed is facing pollution from potential heavy metals, we must strictly control the exogenous to make sure that the quality of tobacco filed is safety.