摘要
为了对复垦后土壤重金属空间分布的稳定度以及某一深度重金属含量变化程度进行定量描述,以徐州矿区复垦土壤中重金属镉(Cd)为例,从土壤重金属横向内在的特征距离关系出发,通过建立描述土壤重金属稳定度和跳跃度的函数模型,分析比较分别以煤矸石和粉煤灰为充填料的复垦土壤中镉空间分布的稳定度及其含量变化程度.结果表明:从稳定度看,在某一深度,粉煤灰复垦土壤中镉的稳定度高于煤矸石复垦土壤;从跳跃度看,在某一深度,粉煤灰复垦土壤中镉含量的变化程度小于煤矸石复垦土壤,即粉煤灰复垦土壤中镉的跳跃度较弱.复垦土壤重金属稳定度和跳跃度的研究,为选择科学合理的复垦方式提供了依据.
For the sake of making quantitative description of the stability of soil heavy metal＇ s spatial distribution after reclamation and the variation of heavy metal＇ s content at a certain depth, this paper taking heavy metal cadmium in the soil of mine reclamation in Xuzhou as an example, from the perspective of the relationship between soil heavy metal transverse inherent characteristic distance, by establishing the function model of describing heavy metal＇ s stability and jumping in soil, analyzed and compared cadmium＇ s stability of spatial distribution and variation of content in the reclaimed soil filled with coal gangue and fly ash. The results show that in the reclaimed soil filled with coal gangue and fly ash, from the stability perspective, the stability of cadmium at a certain depth is higher in reclaimed soil filled with fly ash; from the jumping perspective, at a certain depth, the change of soil heavy metal cadmium＇ s content is smaller in reclaimed soil filled with fly ash. The study of stability and jumping of the soil heavy metal in reclaimed site can provide the basis for choosing scientific and reasonable reclamation mode.
出处
《数学的实践与认识》
北大核心
2015年第9期80-88,共9页
Mathematics in Practice and Theory
基金
国家自然科学基金(51374208)
江苏高校优势学科建设工程(SZBF2011-6-B35)
关键词
函数模型
复垦土壤
重金属镉
稳定度
跳跃度
function model
reclaimed soil
heavy metal cadmium
stability
jumping
