草酸联合东南景天修复镉污染土壤实验研究

doi:10.12068/j.issn.1005-3026.2015.07.025

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (7): 1029-1032.DOI: 10.12068/j.issn.1005-3026.2015.07.025

草酸联合东南景天修复镉污染土壤实验研究

郭凡嫡¹，潘俊²，孙丽娜³，胡筱敏¹

(1.东北大学资源与土木工程学院，辽宁沈阳110819；2.沈阳建筑大学市政与环境工程学院，辽宁沈阳110168;3.沈阳大学区域污染环境生态修复教育部重点实验室，辽宁沈阳110044)

收稿日期:2014-05-19 修回日期:2014-05-19 出版日期:2015-07-15 发布日期:2015-07-15
通讯作者: 郭凡嫡
作者简介:郭凡嫡(1982-)，女，辽宁沈阳人，东北大学博士研究生；胡筱敏(1958-)，男，江西婺源人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金重点资助项目(21037002)；国家重点基础研究发展计划项目(2104CB441100).

Experimental Research on Restoring Cadmium-Contaminated Soil by Using Oxalic Acid Combined with Sedum Alfredii Hance

GUO Fan-di¹， PAN Jun²， SUN Li-na³， HU Xiao-min¹

1.School of Resources & Civil Engineering，Northeastern University，Shenyang 110819，China；2.School of Municipal and Environment Engineering， Shenyang Jianzhu University， Shenyang 110168， China; 3.Key Laboratory of Regional Pollution and Environment Restoration of the Ministry of Education， Shenyang University， Shenyang 110044， China.

Received:2014-05-19 Revised:2014-05-19 Online:2015-07-15 Published:2015-07-15
Contact: HU Xiao-min
About author:-
Supported by:
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摘要/Abstract

摘要： 为了解草酸淋洗联合东南景天修复镉污染土壤的效果，选取矿山生态型东南景天根系分泌物中的草酸作为淋洗剂，联合矿山生态型东南景天进行镉污染土壤修复的实验.通过4种浓度的草酸分别对土壤进行了4次淋洗后，可以看出草酸浓度达到25mmol/L时，东南景天干重最大，地上部镉含量最多，总去除量最大，去除效率可以达到51.34%，与不淋洗组对比高35个百分点.实验表明草酸浓度在25mmol/L时联合东南景天修复镉污染土壤的效果达到最佳.实验证明使用草酸淋洗联合矿山型东南景天修复镉污染土壤，镉的去除效果比较显著，且生态型东南景天生长健康，从而为草酸联合东南景天修复镉污染技术的推广和应用提供了科学依据.

关键词: 镉污染, 东南景天, 矿山生态型, 草酸, 淋洗

Abstract: 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 25mmol/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 25mmol/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.

Key words: cadmium contamination, Sedum alfredii hance, mine ecological, oxalic acid, elution

中图分类号:

郭凡嫡，潘俊，孙丽娜，胡筱敏. 草酸联合东南景天修复镉污染土壤实验研究[J]. 东北大学学报:自然科学版, 2015, 36(7): 1029-1032.

GUO Fan-di， PAN Jun， SUN Li-na， HU Xiao-min. Experimental Research on Restoring Cadmium-Contaminated Soil by Using Oxalic Acid Combined with Sedum Alfredii Hance[J]. Journal of Northeastern University Natural Science, 2015, 36(7): 1029-1032.

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草酸联合东南景天修复镉污染土壤实验研究

Experimental Research on Restoring Cadmium-Contaminated Soil by Using Oxalic Acid Combined with Sedum Alfredii Hance

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