一体化药剂对植物修复重金属尾砂库的效应研究

PILOT SCALE APPLICATION CASE OF THE INTEGRATED AGENTIA FOR THE STABILIZATION AND FERTILIZATION OF HEAVY METALS IN MINING TAILINGS

通过对比试验,考察重金属稳定增肥一体化药剂对矿区剩余尾砂治理的应用效果,探讨其对景观苗木生长以及尾砂重金属有效形态的影响,以修复重金属尾砂库。结果表明:种植植物半年后,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,促进植物生长。添加药剂对植物吸收重金属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,植物吸收积累的重金属含量也有所不同;矿区添加重金属稳定增肥一体化药剂进行植被恢复可以有效控制重金属的淋洗,同时可以降低重金属的有效态含量,使重金属的活性降低,有效修复重金属尾矿库。

The effect of the application case of an integrated agentia,which has the function of heavy metal stabilization and fertility enhancing for minging tailings,the contrast experiments were carried out. The effect of the agentia on the growth of the landscape plants and heavy metals’ biological availability was evaluated. The results showed that,after six months’ growth,Hibiscus mutabilis,Ligustrum vicaryi,and Lagerstroemia indica grew well in the tailings. The integrated agentia can improve the survival rate of plants and promote the growth of landscape plants significantly. The effect of the integrated agentia to obstruct the absorption of heavy metals by landscape plants,had great relevance with plants variety,tolerance and growth conditions. Different seasons and plant growth period,plants uptake and accumulation of heavy metals content was also different. In conclusion,the integrated agentia could effectively reduce the mobility of heavy metals,at the same time,decrease the available heavy metals content of the tailings and effectively repair the mining tailings.