SSSAJ Grow Your Career with SSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 17:359-364 (1953)
© 1953 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow A correction has been published
Right arrow A correction has been published
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Aguilera, N. H.
Right arrow Articles by Jackson, M. L.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Aguilera, N. H.
Right arrow Articles by Jackson, M. L.
Agricola
Right arrow Articles by Aguilera, N. H.
Right arrow Articles by Jackson, M. L.

Iron Oxide Removal from Soils and Clays1

N. H. Aguilera and M. L. Jackson2

ABSTRACT

Iron oxide coatings or crystals must be removed from soils in which they are found in many mineralogical techniques for identification of colloidal layer silicates as well as the identification of silt and sand grains with the polarizing microscope. A procedure is presented which employs sodium dithionite (Na2S2O4, hyposulfite, or "hydrosulfite") as the reductor, and 0.3 molar citrate with or without Fe-3 specific Versene as the chelating reagent. It is a neutral system the pH of which is kept at 7.3. The reaction is fast, as much as 20% of iron oxides (hematite, geothite, or limonite but not magnetite or ilmenite) being removed from a soil in 15 minutes, and does not precipitate either elemental sulfur or iron sulfides. Like other procedures, it causes some decrease of exchange capacity of layer silicates which contain iron, and at the same time may increase the exchange capacity of kaolinic soils.

NOTES

1 Contribution from the Dept. of Soils, Univ. of Wisconsin. This work was supported in part by The Rockefeller Foundation, New York (fellowship through Oficina de Estudios Especiales, Mexico, D.F.) and in part by the University Research Committee through a grant for supplies from the Wisconsin Alumni Research Foundation.

2 Oficina de Estudios Especiales, Londres No. 45, Mexico, D.F., Mexico.

Received for publication April 25, 1953.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Vadose Zone Journal Journal of Plant Registrations
Journal of Natural Resources
and Life Sciences Education		 Journal of
Environmental Quality
Copyright © 1953 by the Soil Science Society of America.