一体化药剂对重金属污染尾砂库的修复效果

摘要

Objective] To research the rehabilitation effects of integrated agent on the tailing sand reservoir with heavy metal pollution. [Method] The control effects of integrated agent on tailing sand were researched by comparative trial.The effects of integrated agent on land-scape seedling growth were studied, as well as on the leaching toxicity of heavy metal in tailing sand.[Result] After seedling planting for 6 months, Hibiscus mutabilis, Ligustrum vicaryi, and Lagerstroemia indica grew well in the tailing sand.The integrated agent significantly en-hanced the survival rate, crown diameter and plant height, and promoted the growth of plant.The effects of added agent on plant P and K ab-sorption had close correlation with the tolerance of plant variety and plant growth.The accumulated P and K contents in plant varied in differ-ent growth periods and seasons.Adding integrated agent in mining area for vegetation recovery could effectively control the leaching of heavy metal, and reduced the leaching toxicity of heavy metal.[ Conclusion] The integrated agent can effectively rehabilitate the tailing sand reser-voir.%[目的]研究一体化药剂对重金属尾砂库的修复效果。[方法]通过对比试验，研究重金属稳定增肥一体化药剂对矿区剩余尾砂治理的修复效果，探讨其对景观苗木生长及尾砂重金属浸出毒性的影响。[结果]种植植物6个月后，木芙蓉、金叶女贞、紫薇等优势植物在尾砂上生长良好；重金属稳定增肥一体化药剂能够显著提高植物的成活率、冠幅和株高，促进植物生长。添加药剂对植物吸收P 、K的影响与植物品种本身耐受性和植物生长情况有很大关联，植物所处的季节及生长时期不同，植物吸收积累的P、K含量也有所不同；矿区添加重金属稳定增肥一体化药剂进行植被恢复可有效控制重金属的淋洗，同时可以降低重金属的浸出毒性。[结论]重金属稳定增肥一体化药剂可有效修复重金属尾砂库。