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Removal of arsenic from contaminated soils using different salt extractants

Alam, M., Tokunaga, S. and Stagnitti, Frank 2007, Removal of arsenic from contaminated soils using different salt extractants, Journal of environmental science and health. Part A; toxic hazardous substances and environmental engineering, vol. 42, no. 4, pp. 447-451, doi: 10.1080/10934520601187641.

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Title Removal of arsenic from contaminated soils using different salt extractants
Author(s) Alam, M.
Tokunaga, S.
Stagnitti, Frank
Journal name Journal of environmental science and health. Part A; toxic hazardous substances and environmental engineering
Volume number 42
Issue number 4
Start page 447
End page 451
Publisher Taylor & Francis Group
Place of publication London, England
Publication date 2007-03
ISSN 1093-4529
1532-4117
Keyword(s) arsenite
arsenate
salt extraction
soil contamination
soil remediation
Summary This study presents an environmental-friendly and cost effective method for the extraction of arsenic from contaminated soils.
Laboratory experiments using inorganic salts, potassium phosphate (KH2PO4), potassium chloride (KCl), potassium nitrate (KNO3), potassium sulfate (K2SO4), and sodium perchlorate (NaClO4) were evaluated as arsenic extractants. An Andosol soil was artificially contaminated with arsenite [As(III)] and arsenate [As(V)]. The soil was washed in a batch process with different salt solutions in the pH range 3–11 for 24 hours at 20◦C. Among the various potassium and sodium salts tested, KH2PO4 was found to be highly effective in extracting arsenic from As(III)-soil attaining more than 80% and 40% from As(V)-soil in neutral pH range. Other salts were particularly ineffective in extraction of arsenic from both soils. More arsenic was extracted more from the As(III)-soil than the As(V)-soil.
Language eng
DOI 10.1080/10934520601187641
Field of Research 100203 Bioremediation
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2007, Taylor & Francis
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007066

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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