| Electromigration of arsenic and co-existing metals in mine tailings. | |
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MedLine Citation:
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PMID: 20888026 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this study was to investigate the feasibility of enhanced electrokinetic remediation technology for controlled leaching and collection of labile arsenic fractions from mine tailings. Direct current was applied to tailings for 20 d using ammonium oxalate and sodium hydroxide as enhancement solutions. Migration of arsenic was observed, resulting in 63-71% removal near the cathode but only 6-17% overall removal in the entire tailings matrix in 20 d. However, significant migration of arsenic towards the anode and accumulation in a collection well near the anode was observed, especially under alkaline conditions. Thus, treatment time and consumption of chemicals could probably be reduced by installing specific collection or adsorption zones near the anode. A relationship between electrokinetic mobility of arsenic and other elements and their extractability in sequential extraction tests was established, indicating that dissolution or desorption of the elements and thermodynamic conditions (pH and Eh gradient) played a bigger role in the electrokinetic removal process than electromigration of soluble ions. |
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Authors:
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Pirjo Isosaari; Mika Sillanpää |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Chemosphere Volume: 81 ISSN: 1879-1298 ISO Abbreviation: Chemosphere Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-11-01 Completed Date: 2010-12-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0320657 Medline TA: Chemosphere Country: England |
Other Details:
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Languages: eng Pagination: 1155-8 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Civil and Environmental Engineering, Aalto University School of Science and Technology, Aalto, Finland. pirjomail@gmail.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Arsenic
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analysis,
chemistry* Electrochemical Techniques* Environmental Remediation / methods* Feasibility Studies Kinetics Mining* Soil Pollutants / analysis, chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Soil Pollutants; 7440-38-2/Arsenic |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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