SPATIAL-TEMPORAL VARIATION OF HEAVY METAL ELEMENTS CONTENT IN COVERING SOIL OF RECLAMATION AREA IN FUSHUN COAL MINE

Grid method is employed for sampling covering soil at the test field,whic h is reclamation area filled by coal mining wastes for cropland in th e Fushun coal mine,Liaoning Province,the Northeast China.The soil samp les are taken at different locations,inclu ding three kinds of covering soil,th ree different depths of soil layers a nd four different covering ages of covering soil.The s patial-temporal variation of heavy metal element content in reclamatio n soil is stud-ied.The results indicate that the co ntent of heavy metal elements is decreasing year after year;the determin ant reason why the content of heavy metal elemen ts at 60cm depth layer is higher than t hat at 30cm depth layer and surface is fertiliz-er and manure application;the metal elements mainly come from external environment;there is no metal pollut ion coming from mother material(coal mining wastes)in plough layer of covering soil.

矿山复垦土壤典型元素时空变化研究

在抚顺矿区矸石回填复垦还田生态重建试验区,利用网格布点取样法采集不同覆土类 型、不同土壤深度、不同覆土时间的土壤样品,对矿山复垦土壤的营养元素和重金属元素的 时空变化进行了研究.结果表明,矸石回填覆土后,营养元素含量在覆土初期恢复较快,覆土中 重金属元素含量呈逐年递减趋势;施(培)肥造成了重金属元素和营养元素含量表层高于30cm 层和60cm层;覆土中重金属元素主要来源于外界输入; 矸石母质中的重金属不存在对覆土耕 作层的污染问题.

矿山复垦土壤重金属元素时空变化研究

利用网格布点取样法采集抚顺矿区老虎台井田煤矿北部矸石回填复垦还田生态重建试验区不同覆土类型、不同土壤深度、不同覆土年龄的土壤样品 ,对矿山复垦土壤的重金属元素的时空变化进行了研究。结果表明 ,矸石回填覆土后 ,重金属元素含量呈逐年递减趋势 ;施 (培 )肥造成了重金属元素含量表层高于 30 cm和 60 cm土层 ;覆土中重金属元素主要来源于外界输入 ;