地质通报Issue(8)：1097-1105,9.
矿业活动区农田土壤重金属累积风险的评判方法--以小秦岭金矿区为例
An assessment method for heavy metal cumulative risk on farmland soil in the mining area：A case study of the Xiaoqinling gold mining area
摘要
Abstract
The accumulation of heavy metals in soil is generally sourced from metal mineral exploitation activities in the mining area, and hence the key to assessing the cumulative effect and risk of heavy metal accumulation in soil is to choose scientific evaluation stan-dards and methods. In this paper, the background of heavy metals and the meaning of the soil environmental quality standards were briefly explained, and the average heavy metal concentrations in adjacent areas with the same or similar conditions were taken as the background of heavy metal accumulation. In 2011, case study was performed in the Xiaoqinling gold mining area. 80 groups of heavy metal samples were collected in the agricultural soil. The experimental results showed that the proportion of lower risk samples of heavy metals to total samples was in order of Hg>Cd>Pb>Cu, whereas the contribution rate of mining activities on the soil heavy metal accumulation was in order of Hg>Cu>Pb>Cd>Zn. There existed no risk of Cr, As and Zn in soil in spite of slight accumula-tion of these elements. The risk area of Hg reached 187.77km2, accounting for 47.08%of the total survey area. And the area of mid-dle and high risk possessed 99.55km2, suggesting an extremely serious situation. The research results provide the scientific evaluation of the cumulative effects and contribution of mining activities on the heavy metal accumulation in soil and point out the way forward in the aspect of the soil pollution prevention.关键词
农田土壤/矿业活动/重金属累积风险/评判方法/小秦岭金矿区Key words
farmland soil/mining activities/heavy metal cumulative risk/assessment method/Xiaoqinling gold mining area分类
天文与地球科学引用本文复制引用
徐友宁,张江华,柯海玲,陈华清,刘瑞平,乔冈,史宇飞..矿业活动区农田土壤重金属累积风险的评判方法--以小秦岭金矿区为例[J].地质通报,2014,(8):1097-1105,9.基金项目
国土资源部行业科研专项（编号20111020、200811061）、中国地质调查局项目（编号1212010741003、1212011140024）和国土资源部陕西潼关金矿区地质环境野外科学观测基地及国土资源部黄土地质灾害重点实验室项目 （）
