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Removal of arsenic from contaminated soils using different salt extractants

Version 2 2024-06-13, 07:45
Version 1 2014-10-27, 16:43
journal contribution
posted on 2024-06-13, 07:45 authored by M Alam, S Tokunaga, F Stagnitti
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.

History

Journal

Journal of environmental science and health. Part A; toxic hazardous substances and environmental engineering

Volume

42

Pagination

447-451

Location

London, England

ISSN

1093-4529

eISSN

1532-4117

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2007, Taylor & Francis

Issue

4

Publisher

Taylor & Francis Group

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