The removal of Cu, Ni, and Zn in industrial soil by washing with EDTA-organic acids
In order to improve the heavy metal removal ability of traditional single washing agents and explore the removal mechanism of heavy metals. Then, the washing reagents that mixed by low-molecular weight organic acids (citric acid, oxalic acid, and tartaric acid) and artificial chelating compound ethy...
Main Authors: | , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2020-04-01
|
Series: | Arabian Journal of Chemistry |
Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535220300617 |
id |
doaj-14a26321467141fdb7b21eae99594999 |
---|---|
record_format |
Article |
spelling |
doaj-14a26321467141fdb7b21eae995949992020-11-25T01:58:16ZengElsevierArabian Journal of Chemistry1878-53522020-04-0113451605170The removal of Cu, Ni, and Zn in industrial soil by washing with EDTA-organic acidsShuailong Cheng0Qintie Lin1Yupeng Wang2Haoyu Luo3Zhuofan Huang4Hengyi Fu5Hengrui Chen6Rongbo Xiao7Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaGuangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China; Corresponding author.Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaGuangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaGuangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaGuangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaInternational Dept., The Affiliated High School of South China Normal University, Guangzhou 510000, PR ChinaGuangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaIn order to improve the heavy metal removal ability of traditional single washing agents and explore the removal mechanism of heavy metals. Then, the washing reagents that mixed by low-molecular weight organic acids (citric acid, oxalic acid, and tartaric acid) and artificial chelating compound ethylenediaminetetraacetic acid disodium (EDTA) were selected. Furthermore, the effect of soil washing parameters, the variation of leaching toxicity, mobility, stability and speciation of heavy metals were also considered. The results of soil washing experiments showed that mixing an equal volume of 0.05 M EDTA and 0.2 M organic acids (citric acid, oxalic acid, and tartaric acid) could remove more than about 80% heavy metals from soil under the optimal conditions. In addition, the soil leaching toxicity was decreased and the stability of remaining heavy metals was increased, indicating that EDTA-organic acid washing reagents could effectively reduce the ecological risk of contaminated soil. EDTA had a stronger chelating ability with heavy metals than the organic acids, and the organic acids could not only chelate heavy metals but also decrease the pH of the mixture for promoting the desorption of heavy metals. Thus, mixing EDTA and organic acids was advisable method to improve soil washing technology. Keywords: Soil washing, EDTA-organic acids, Heavy metals, Chelating, Desorptionhttp://www.sciencedirect.com/science/article/pii/S1878535220300617 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shuailong Cheng Qintie Lin Yupeng Wang Haoyu Luo Zhuofan Huang Hengyi Fu Hengrui Chen Rongbo Xiao |
spellingShingle |
Shuailong Cheng Qintie Lin Yupeng Wang Haoyu Luo Zhuofan Huang Hengyi Fu Hengrui Chen Rongbo Xiao The removal of Cu, Ni, and Zn in industrial soil by washing with EDTA-organic acids Arabian Journal of Chemistry |
author_facet |
Shuailong Cheng Qintie Lin Yupeng Wang Haoyu Luo Zhuofan Huang Hengyi Fu Hengrui Chen Rongbo Xiao |
author_sort |
Shuailong Cheng |
title |
The removal of Cu, Ni, and Zn in industrial soil by washing with EDTA-organic acids |
title_short |
The removal of Cu, Ni, and Zn in industrial soil by washing with EDTA-organic acids |
title_full |
The removal of Cu, Ni, and Zn in industrial soil by washing with EDTA-organic acids |
title_fullStr |
The removal of Cu, Ni, and Zn in industrial soil by washing with EDTA-organic acids |
title_full_unstemmed |
The removal of Cu, Ni, and Zn in industrial soil by washing with EDTA-organic acids |
title_sort |
removal of cu, ni, and zn in industrial soil by washing with edta-organic acids |
publisher |
Elsevier |
series |
Arabian Journal of Chemistry |
issn |
1878-5352 |
publishDate |
2020-04-01 |
description |
In order to improve the heavy metal removal ability of traditional single washing agents and explore the removal mechanism of heavy metals. Then, the washing reagents that mixed by low-molecular weight organic acids (citric acid, oxalic acid, and tartaric acid) and artificial chelating compound ethylenediaminetetraacetic acid disodium (EDTA) were selected. Furthermore, the effect of soil washing parameters, the variation of leaching toxicity, mobility, stability and speciation of heavy metals were also considered. The results of soil washing experiments showed that mixing an equal volume of 0.05 M EDTA and 0.2 M organic acids (citric acid, oxalic acid, and tartaric acid) could remove more than about 80% heavy metals from soil under the optimal conditions. In addition, the soil leaching toxicity was decreased and the stability of remaining heavy metals was increased, indicating that EDTA-organic acid washing reagents could effectively reduce the ecological risk of contaminated soil. EDTA had a stronger chelating ability with heavy metals than the organic acids, and the organic acids could not only chelate heavy metals but also decrease the pH of the mixture for promoting the desorption of heavy metals. Thus, mixing EDTA and organic acids was advisable method to improve soil washing technology. Keywords: Soil washing, EDTA-organic acids, Heavy metals, Chelating, Desorption |
url |
http://www.sciencedirect.com/science/article/pii/S1878535220300617 |
work_keys_str_mv |
AT shuailongcheng theremovalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT qintielin theremovalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT yupengwang theremovalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT haoyuluo theremovalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT zhuofanhuang theremovalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT hengyifu theremovalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT hengruichen theremovalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT rongboxiao theremovalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT shuailongcheng removalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT qintielin removalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT yupengwang removalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT haoyuluo removalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT zhuofanhuang removalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT hengyifu removalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT hengruichen removalofcuniandzninindustrialsoilbywashingwithedtaorganicacids AT rongboxiao removalofcuniandzninindustrialsoilbywashingwithedtaorganicacids |
_version_ |
1724970656868597760 |