降雨条件下煤矸石淋溶微量元素传输的动力学研究  

STUDY ON TRACE ELEMENTS TRANSPORT FROM COAL MINE SPOIL UNDER THE CONDITION OF RAINFALL

作　　者：王雪峰[1] 

机构地区：[1]华中科技大学水电与数字化工程学院,湖北武汉430074

出　　处：《武汉工业学院学报》2007年第1期73-75,共3页Journal of Wuhan Polytechnic University

基　　金：国家自然科学基金项目(50374041)

摘　　要：采矿活动造成矿区地表堆积大量的固体废物,其中煤矸石通过降雨淋溶作用产生的污染物质对地下水造成的污染已越来越严重。基于多孔介质流体力学和溶质运移动力学理论建立了定量描述微量元素在土壤水环境系统中迁移的数学模型,通过有限元法进行数值离散,分析了不同质地的土壤和降雨强度对于煤矸石中的某些微量元素的析出速度的影响。结果表明:粘性土对微量元素具有较强的截留作用,淋溶时间、pH值的大小对污染的影响,对不同微量元素其淋溶量也会有所不同,淋溶时间越长,微量元素的淋溶量会不断地增加。随着时间的增加,微量元素污染的范围将不断扩大。Mining waste, generated from active and inactive mining sites and from beneficiation activities has an impact on human health and the environment, which are a continuing problem for government entities, private industry and the general public. Based on the porous media fluid mechanics and solute transport theory, the mathematical models are developed for describing the transportation and transformation of the trace elements in groundwater aquifer. Solutions to the coupled model are accomplished by finite-element method. The effects of pH value on coal mine spoil trace elements are analyzes on the basis of column leaching experiments. The rainfall intensity separates out on the speed of regarding gangue in certain trace elements the influence and analyzed the different soil texture to dam the current the function regarding the trace element. Numerical results show that the cohesive soil has strongly to the trace element temporarily stops the function and the leaching time and pH value has large impact on the contaminants transport. Different trace elements are differently affected by pH values of leaching media. The longer of leaching time, the higher of trace elements concentration. The subsurface pollution range has a trend of increase with time.

关 键 词：煤矸石 微量元素 动力学模型 数值模拟 

分 类 号：P584[天文地球—岩石学]