| The effect of EDTA, NTA and picolinic acid on Th(IV) mobility in a ternary system with natural sand. | |
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MedLine Citation:
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PMID: 22243891 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Organic complexing agents, such as ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA) and picolinic acid, have been widely used at nuclear sites and are therefore found as common co-contaminants in radioactive contaminated land. This study has explored the mechanisms by which these three complexing agents affect the sorption of Th(IV) to pure silica and a natural sand. EDTA, NTA and, to a lesser extent, picolinic acid decreased the sorption of Th to silica, demonstrating the formation and solubility of Th complexes. However, Th sorption to sand was kinetically controlled and complexation enhanced the rate of Th sorption. EDTA and NTA did not sorb significantly to the sand, and metal desorption indicated that the mechanism involved exchange with sand-associated metals. At equilibrium, however, Th sorption was not affected by the presence of the ligands, and modelling suggested that the interaction between Th and the surface binding sites controlled Th sorption thermodynamically. |
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Authors:
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Estela Reinoso-Maset; Paul J Worsfold; Miranda J Keith-Roach |
Publication Detail:
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Type: Journal Article Date: 2011-12-28 |
Journal Detail:
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Title: Environmental pollution (Barking, Essex : 1987) Volume: 162 ISSN: 1873-6424 ISO Abbreviation: Environ. Pollut. Publication Date: 2012 Mar |
Date Detail:
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Created Date: 2012-01-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804476 Medline TA: Environ Pollut Country: England |
Other Details:
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Languages: eng Pagination: 399-405 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Biogeochemistry and Environmental Analytical Chemistry Group, Biogeochemistry Research Centre, University of Plymouth, Plymouth PL4 8AA, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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