兰州市永登县农用地表层土壤中铜锌镍元素含量特征

CHARACTERISTICS OF COPPER, ZINC AND NICKEL CONTENTS IN SURFACE SOIL OF FARMLAND IN YONGDENG COUNTY, LANZHOU CITY

为研究兰州市永登县农用地土壤重金属含量及分布特征,依据研究区农用地土壤类型、土地利用现状和种植现状等将研究区划分为5个区域。在此基础上共布设228个土壤表层采样点进行取样,对土壤样品中铜、锌和镍等3种重金属元素的含量进行了分析。结果表明:研究区土壤铜和锌数据呈右偏态分布,土壤镍数据呈左偏态分布;铜、锌和镍3项土壤重金属元素含量皆低于风险筛选值,均无风险或风险可忽略。

In order to study the soil heavy metal content and distribution characteristics of agricultural land in Yongdeng County, Lanzhou City, the study area is divided into 5 areas based on the soil type, land use status and planting status of the agricultural land in the study area. On this basis, a total of 228 soil surface sampling points were set up for sampling, and the content of three heavy metal elements, including copper, zinc and nickel,in the soil samples were analyzed. The results show that the soil copper and zinc data in the study area have a right skewed distribution, and the soil nickel data have a left skewed distribution;copper, zinc and nickel element content of heavy metals are lower than three risk screening values, no risk or negligible risk.