农田表层土壤重金属铅背景值调查与评价

Survey and Evaluation of Heavy Metal Lead Background Value in Suburbs Farmland Top Soil

本论文通过对包头市北郊区不同土地类型土壤重金属铅背景值的调查取样,用火焰原子吸收分光光度法对土壤铅进行检测,获得研究区的土壤铅含量结果,然后依据国家《食用农产品产地环境质量评价标准(HJ332-2006,2007-02-01》)中"土壤环境质量评价指标限值"对土壤环境质量进行评价。评价结果显示,研究区的单项污染指数最大值为0.37,土壤质量属于清洁级。经过详细分析认为,在研究区种植农作物如小麦、玉米和蔬菜等,都没有安全风险。研究结果将为进一步开展无公害农产品基地建设、开展土壤重金属污染潜在影响和农用土地资源与环境适宜性评价奠定了基础,对科学合理地利用土壤资源具有重要的现实意义。

In this paper, through the soil samples in different types of land-lead background value at the northern suburbs of Baotou,by Flame Atomic Absorption Spectrometry on soillead detection, the content of lead in the soil of the study area was collected,Then according to the 'soil environmental quality assessment indicators limits' inside the national standard 'Farmland environmental quality evaluation standards for edible agricultural products(HJ 332-2006,2007-02-01)'soil environment quality was evaluated.Evaluation results show that Maximum individual pollution index is 0.37 and it is safe and clean soil quality level in the study area. After detailed analysis,since the environment quality of soillead clean in the study area,then the cultivation of food crops such as wheat,corn and vegetables, is not within security risks. The results will further develop pollution-free agricultural products base-building, heavy metal contamination of soil and agricultural potential of land resources and environmental suitability evaluation laid the foundation for scientific and rational use of soil resources is of great realistic significance.