摘要
目的研究确定复合淋洗剂去除土壤中Cd、Cu污染物的最佳技术参数.方法通过一系列静态试验,以沈阳市张士灌区受污染土样为供试样品,采用振荡、离心法研究了以组成为柠檬酸和柠檬酸三钠的复合淋洗剂的浓度配比、pH值、液固比、振荡时间等对供试土样中Cd、Cu的去除效果.结果参数研究表明,复合淋洗剂的浓度配比为V(0.1 mol/L柠檬酸)∶V(0.3 mol/L柠檬酸三钠)=1∶1、pH值为6、液固比为25/1、振荡时间为24 h的条件下能达到对Cd、Cu的最大去除率,去除率分别为90.25%、62.85%.结论柠檬酸-柠檬酸三钠的复合淋洗剂对土壤中的重金属有很好的去除效果,是理想的Cd、Cu浸提剂.
A leaching technology was applied to treat the contaminated soil by Cd and Cu in Shenyang Zhangshi Irrigation Area using a composites solution which makes up of V（0. lmol/LCA） ： V（0.3mol/L sodium citrate） = 1：1. Batch experiments were performed to test the influence of composites solution pH, liquid - solid ratio, and time. Results show that utilization of composites solution was effective for removal of Cd and Cu from the contaminated soil, attaining 90.25 % of Cd, 62.85 % of Cu at pH is 6 , liquid - solid ratio is 25/1 within 24 h. Such a remediation procedure indicates that composites solution is a promising agent for remediation of Cd and Cu contaminated soils.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
2008年第5期840-844,共5页
Journal of Shenyang Jianzhu University：Natural Science
基金
建设部科学技术项目(2007-K4-24)
