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 34:401-404 (1970)
© 1970 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
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 Weber, J. B.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Weber, J. B.
Agricola
Right arrow Articles by Weber, J. B.

Adsorption of s-Triazines by Montmorillonite As a Function of pH and Molecular Structure1

J. B. Weber2

ABSTRACT

The effect of pH on the adsorption of 16 structurally related s-triazines by Na-montmorillonite was investigated. Slurry type adsorption techniques were used. The compounds included ametryne, desmetryne, prometryne, GS 14253, GS 14260, GS 16065, atrazine, SD-15418, dyrene, atratone, prometone, GS 28533, melamine, ammeline, ammelide, and benzoguanamine. Maximum adsorption occurred at pH levels in the vicinity of the pKA of each compound. The amount of adsorption which resulted was related to the substituent groups on the triazine ring. Comparisons of compounds substituted in the 2-position indicated that adsorption of the s-triazines by montmorillonite decreased in the order: -SC2H5 > -SCH3 > -OCH3 > OH > -Cl. Substitutions made in the 4 and 6 positions indicated that dialkylamino compounds were adsorbed in greater amounts than monoalkyl substituted compounds and that adsorption decreased in the order: C4H9(t) > C4H9(s) > C2H5 > C3H7(i) > CH3 > C(CH3)2CN. The more basic compounds were adsorbed in greater amounts than compounds of lower basicity.

NOTES

1 Paper no. 2975 of the Journal Series of the North Carolina State University Agr. Exp. Sta., Raleigh, N.C. This investigation was supported by Public Health Service Research Grant no. FD 00254 from the Consumer Protection and Environmental Health Service, Food and Drug Administration. Presented before Div. S-2, Soil Science Society of America, Nov. 11, 1969, at Detroit, Mich.

2 Associate Professor of Crop Science and Soil Science, North Carolina State University, Raleigh, N.C.

Received for publication September 23, 1969. Accepted for publication October 13, 1969.






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 © 1970 by the Soil Science Society of America.