Experimental research on restoring cadmium-contaminated soil by using oxalic acid combined with sedum alfredii hance

被引：0
作者：
School of Resources & Civil Engineering, Northeastern University, Shenyang [1 ]
110819, China
不详 [2 ]
110168, China
不详 [3 ]
110044, China
机构：
[1] School of Resources & Civil Engineering, Northeastern University, Shenyang
[2] School of Municipal and Environment Engineering, Shenyang Jianzhu University, Shenyang
[3] Key Laboratory of Regional Pollution and Environment Restoration of the Ministry of Education, Shenyang University, Shenyang
来源：
Dongbei Daxue Xuebao | / 7卷 / 1029-1032期
关键词：
Cadmium contamination; Elution; Mine ecological; Oxalic acid; Sedum alfredii hance;
D O I：
10.3969/j.issn.1005-3026.2015.07.025
中图分类号：
学科分类号：
摘要：
For studying the effect of restoring cadmium-contaminated soil by using oxalic acid elution combined with Sedum alfredii hance, a test was performed by using Sedum alfredii hance combined with oxalic acid chosen from the roots secretion of mine ecological Sedum alfredii hance as an eluent. After four times of soil elution tests were doned by using four different concentration oxalic acid solutions, it was shown that when the concentration of oxalic acid was 25 mmol/L, the maximum dry weight of Sedum alfredii hance and the most abundant cadmium on the ground were obtained. The total mass removal rate was the biggest, which could arrive at 51.34%, and it was higher than the group of no elution for 35 percent points. The test results showed that the effect of restoring cadmium-contaminated soil was the best when using the 25 mmol/L concentration oxalic acid combined with Sedum alfredii hance. This test results can prove that the oxalic acid combined with mine ecological Sedum alfredii hance has a significant effect in the cadmium removal to restore cadmium-contaminated soil, and the ecotype Sedum alfredii hance grows healthy as well. Scientific proof is provided for the promotion and application of the restoring technology of cadmium-contaminated soil by using oxalic acid combined with Sedum alfredii hance. ©, 2015, Northeastern University. All right reserved.
引用
收藏
页码：1029 / 1032
页数：3
相关论文
共 10 条
  • [1] Colbron T., Tom S.F.S., Soto A.M., Developmental effects of endocrine-disrupting chemicals in wildlife and humans, Environmental Health Perspectives, 101, 5, pp. 378-384, (1993)
  • [2] Chen L., Song Y.-F., Zhang W., Et al., Assessment of toxicity effects for cadmium contamination in soils by means of multi-indexes, Environmental Science, 29, 9, pp. 2606-2612, (2008)
  • [3] Moffat A.S., Plants proving the worth in toxic metal clean up, Science, 269, pp. 302-303, (1995)
  • [4] Baker A.J.M., Mcgrath S.P., Si D.C., Et al., The possibility of in situ heavy metal decontamination of polluted soils using crops of metal accumulating plants, Resources Conservation and Recycling, 11, 1-4, pp. 41-49, (1994)
  • [5] Salt D.E., Blaylock M., Kumar N.P.B.A., Et al., Phytoremediation: a novel strategy for the removal of toxic metals from the environment using plants, Bio/Technology, 13, 5, pp. 468-474, (1995)
  • [6] Jiang X.-J., Luo Y.-M., Zhao Q.-G., Research on plants rehabilitation and EDTA regulation of cadmium-contaminated soil: I. the poisonousness of cadmium to the hyperaccumulator brassica juncea, Soil, 33, 4, pp. 197-201, (2001)
  • [7] Wei S.-H., Zhou Q.-X., Wang X., Et al., Screening of hyperaccumulator with heavy metal in the ruderal, Progress in Natural Science, 13, 12, pp. 1259-1265, (2003)
  • [8] Mann J.M., Full scale and pilot-scale soil washing, Journal of Hazardous Materials, 66, 1-2, pp. 119-136, (1999)
  • [9] Semer R., Reddy K.R., Evaluation of soil washing process to remove mixed contaminants from a sandy loam, Journal of Hazardous Materials, 45, 1, pp. 45-57, (1996)
  • [10] Xu W.H., Liu H., Ma Q.F., Root exudates, rhizosphere Zn fractions, and Zn accumulation of ryegrass at different soil Zn levels, Pedosphere, 17, 3, pp. 389-396, (2007)
1