DocumentCode
3342943
Title
Notice of Retraction
Application of Sequential Extraction Analysis to Electrokinetic Remediation of Chromium Contaminated Soil
Author
ShuCai Li ; TingTing Li ; FengMei Li ; LiLi Liang ; Gang Li ; ShuHai Guo
Author_Institution
Inst. of Appl. Ecology, Chinese Acad. of Sci., Shenyang, China
fYear
2011
fDate
10-12 May 2011
Firstpage
1
Lastpage
4
Abstract
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
Electrokinetic remediation of chromium contaminated soil is affected by the species of chromium in soil. This work studies the extent of chromium migration and the speciation of chromium during the enhanced electrokinetic remediation process. Two lab-scale electrokinetic experiments were carried out to remediate chromium contaminated soil from a chromite ore processing residue (COPR) deposited site in the northeast of China, using two different solutions (0.2 mol/L sodium acetate and acetic acid buffer solution, 0.1 mol/L sodium citrate and citric acid buffer solution) as catholyte. Each experiment was conducted for 15 days under the application of a voltage gradient of 1.37 V /cm. After remediation, the extent of chromium migration in soil was determined. Speciation of chromium in soil before and after remediation was determined by sequential extraction analyses. The average removal efficiency of total chromium and hexavalent chromium (Cr(VI)) was 11.32% and 81.23% using 0.2 mol/L sodium acetate and acetic acid buffer solution as catholyte. When Using 0.1 mol/L sodium citrate and citric acid buffer solution as catholyte, 21.06% of the initial total chromium was removed and the Cr(VI) removal efficiency was 75.89%. The binding type of chromium with soil was changed from a more difficult extraction type (residual fraction and oxidizable fraction) to easier extraction types (exchangeable and carbonate fraction) after electrokinetic treatment using 0.1 mol/L sodium citrate and citric acid buffer solution as catholyt- .
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
Electrokinetic remediation of chromium contaminated soil is affected by the species of chromium in soil. This work studies the extent of chromium migration and the speciation of chromium during the enhanced electrokinetic remediation process. Two lab-scale electrokinetic experiments were carried out to remediate chromium contaminated soil from a chromite ore processing residue (COPR) deposited site in the northeast of China, using two different solutions (0.2 mol/L sodium acetate and acetic acid buffer solution, 0.1 mol/L sodium citrate and citric acid buffer solution) as catholyte. Each experiment was conducted for 15 days under the application of a voltage gradient of 1.37 V /cm. After remediation, the extent of chromium migration in soil was determined. Speciation of chromium in soil before and after remediation was determined by sequential extraction analyses. The average removal efficiency of total chromium and hexavalent chromium (Cr(VI)) was 11.32% and 81.23% using 0.2 mol/L sodium acetate and acetic acid buffer solution as catholyte. When Using 0.1 mol/L sodium citrate and citric acid buffer solution as catholyte, 21.06% of the initial total chromium was removed and the Cr(VI) removal efficiency was 75.89%. The binding type of chromium with soil was changed from a more difficult extraction type (residual fraction and oxidizable fraction) to easier extraction types (exchangeable and carbonate fraction) after electrokinetic treatment using 0.1 mol/L sodium citrate and citric acid buffer solution as catholyt- .
Keywords
chromium; contaminated site remediation; electrokinetic effects; geochemistry; soil pollution; Cr; acetic acid buffer solution; average removal efficiency; chromite ore processing residue deposited site; chromium contaminated soil; chromium migration analysis; chromium removal efficiency; citric acid buffer solution; electrokinetic remediation process; electrokinetic treatment process; lab-scale electrokinetic experiment; northeast China; sequential extraction analysis; sodium acetate; sodium citrate; voltage gradient; Anodes; Chromium; Electrokinetics; Hazards; Soil; Water pollution;
fLanguage
English
Publisher
ieee
Conference_Titel
Bioinformatics and Biomedical Engineering, (iCBBE) 2011 5th International Conference on
Conference_Location
Wuhan
ISSN
2151-7614
Print_ISBN
978-1-4244-5088-6
Type
conf
DOI
10.1109/icbbe.2011.5781379
Filename
5781379
Link To Document