中文摘要：

以粉状赤泥为原料制备赤泥基颗粒,施加于模拟铅污土中对铅进行原位化学修复。在修复培养期间分别于第5,15,30,60,90天取土样,通过连续提取不同形态铅并测定其含量。对比空白试验,分析不同形态铅含量的变化以确定修复效果,并对修复条件的影响进行研究。研究结果表明：与施用赤泥原料粉相比,赤泥颗粒逐渐释放的游离OH？对土壤pH的影响减小。赤泥颗粒施用量控制在5%,保持22.10%~26.64%土壤含水率,对铅的修复效果好,离子交换态和生物有效态铅含量显著降低,最大降幅分别达94.50%和45.95%,而残渣态铅增幅为48.46%。

英文摘要：

The red mud based particle was produced by red mud powder and applied to lead contaminated soil for in-situ chemical remediation.Soil samples were taken at 5,15,30,60,90 d during the remediation,and then sequential extraction was used to extract the fractions of lead and the contents were determined.The effects of remediation were analyzed by comparing the changes of different forms of lead to the control trail and the restoration conditions were also studied.Experimental results show that the growth of soil pH is gone down as the gradually releasing of OH-from red mud based particle.When the amount of red mud particle is 5% and the soil moisture is maintained 22.10%-26.64%,the significant remediation of lead in contaminated soil is achieved.The contents of ion-exchange and bio-effective are reduced and the largest decreases are 94.50% and 45.95% while the increase of residual is 48.46%.