【摘要】 采用地统计学中的普通克里格和概率克里格研究了汉源富泉铅锌矿区土壤重金属的空间变异特征、污染情况以及空间分布的影响因素。结果表明,土壤样本的Cd、Pb和Zn的平均值分别为(10.92±12.22)mg·kg-1、(657.92±1031.87)mg·kg-1和(1549.06±1915.55)mg·kg-1,空间变异呈团状分布,变异方向主要发生在东北-西南方向;3种元素高值区主要集中在北偏东矿山尾矿堆积的区域,其次为临近矿山靠近公路农田土壤部分,低值区主要集中在西北方向;研究区东北、东南区域3种重金属元素超标概率最大,西北区域超标概率最小。由于土壤重金属空间分布的影响因素主要为外源污染,对成矿元素的污染,应采取矿产资源开采与环境协调发展的途径;对伴生污染元素,应根据土壤的污染程度,采用一定富集或耐性能力的植物进行修复或开发利用,防止重金属对生态环境的污染。更多还原

【Abstract】 This paper studied the spatial variability of Cd, Pb and Zn in soil, the factors and the environmental pollution around Fuquan lead/zine mine in Hanyuan by the Ordinary Kriging and Probability Kriging. The results showed that the average contents of Cd, Pb and Zn in soil samples were (10.92±12.22)mg·kg-1, (657.92±1 031.87) mg·kg-1 and (1 549.06±1 915.55) mg·kg-1, respectively, the spatial distribution appeared as gobbets; the main change occurred in NE-SW. The highest value existed in the northeast part where the mine tailings accumulated and then in the farmland soil which were in the vicinity of lead/zine mine, the lowest value mainly existed in the northwest part. The probability of the heavy metal contents exceeding the criterion in the northeast and southeast was much greater than that in the northwest part of the area. The outside pollution was the main factor which leaded to the spatial variability of the heavy metals. For the ore element pollution, more attention should be paid to the environmental development in the meanwhile of picking up mining resources. For the associated element pollution, according to the extent of the soil pollution, the plants which are able to endurance and concentrate the elements should be planted to prevent the further heavy metal pollution to the ecological environment.更多还原