江西永平铜矿排土场土壤质量评价

Evaluation on Soil Quality of Waste Dump in Yongping Copper Mine of Jiangxi Province

对江西永平铜矿排土场土壤进行调查和理化性质分析,运用模糊综合评价方法对东部和西部排土场的土壤养分状况和重金属污染程度进行评价。结果表明,土壤受到铜污染最为严重,镉次之,排土场土壤污染等级均为重度污染;土壤全钾和全氮含量极低,土壤养分状况极度贫乏。根据评价结果为进行生态修复提供初步建议,进行土壤生态修复过程中可以通过施加土壤改良剂、引进重金属超积累植物和固氮植物等措施,降低重金属毒性,改善土壤养分状况,实现生态修复。

On the basis of surveying the soil characteristics and analyzing the physicochemical properties in Yongping copper mine of Jiangxi province, the soil nutrition and heavy metals contamination of waste dumps of the west and east were assessed by using fuzzy comprehensive evaluation method. The results indicated that copper was the dominant metal contaminant in soil, cadmium the second, all the areas of the waste dumps were polluted seriously. The contents of total K and N were very low and the soil nutrients of all the soils were deficient. Therefore, it is imperative to remediate soil through measures of adding soil amendments, introducing in hyperaccumulators of heavy metals and nitrogen-fixing plants during ecological restoration, which is expected to decrease the toxicity of heavy metals and improve the soil nutrition.