HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Celis, R. Articles by Koskinen, W. C. Search for Related Content PubMed Articles by Celis, R. Articles by Koskinen, W. C. GeoRef GeoRef Citation Agricola Articles by Celis, R. Articles by Koskinen, W. C.

Sorption of Atrazine and Simazine by Model Associations of Soil Colloids

Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, P.O. Box 1052, 41080 Sevilla, Spain

W. C. Koskinen

USDA-ARS and Dep. of Soil Sci., Univ. of Minnesota, 1991 Upper Buford Circle, St. Paul, MN 55108

*Corresponding author (cornejo{at}irnase.csic.es).

ABSTRACT

The effect of association processes between single model soil components (i.e., Ca-saturated montmorillonite [CaSWy], ferrihydrite [Ferrih], and soil and commercial humic acid [HA]) upon their association in binary and ternary CaSWy-Ferrih-HA systems on physicochemical properties (specific surface area, pH, and basal spacing) and on triazine herbicide sorptive behavior was determined. Ferrihydrite coatings on CaSWy increased the specific surface area of the clay and slightly decreased pH, whereas HA coatings on CaSWy and Ferrih decreased both specific surface area and pH. Further association of HA with the CaSWy-Ferrih binary system decreased the specific surface area, but did not change the pH. Atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) and simazine (2-chloro-4,6-bis(ethylamino)-s-triazine) sorption-desorption data showed that the sorptive behavior of the associations is not the simple sum of the sorption on single components. The HA association with CaSWy increased sorption of both herbicides by the clay, as suggested by an increase in sorption capacity (K_oc) for the CaSWy-HA binary system. Although Ferrih did not sorb either triazine, Ferrih coatings on CaSWy increased sorption of both herbicides on the clay. The association of HA with Ferrih sorbed both triazines, but K_oc decreased compared with HA alone. Further association of the CaSWy-Ferrih binary system with soil HA decreased the sorption, whereas association with commercial HA increased it. Desorption isotherms of atrazine and simazine showed that sorption by the model associations was reversible.

Received for publication August 22, 1996.

This article has been cited by other articles:

				Y. Zhang, D. Zhu, and H. Yu Sorption of Aromatic Compounds to Clay Mineral and Model Humic Substance-Clay Complex: Effects of Solute Structure and Exchangeable Cation J. Environ. Qual., May 1, 2008; 37(3): 817 - 823. [Abstract] [Full Text] [PDF]

				S. M. Charles, B. J. Teppen, H. Li, and S. A. Boyd Fractional Availability of Smectite Surfaces in Soils for Adsorption of Nitroaromatic Compounds in Relation to Soil and Solute Properties Soil Sci. Soc. Am. J., May 1, 2008; 72(3): 586 - 594. [Abstract] [Full Text] [PDF]

				H. Li, B. J. Teppen, D. A. Laird, C. T. Johnston, and S. A. Boyd Effects of Increasing Potassium Chloride and Calcium Chloride Ionic Strength on Pesticide Sorption by Potassium- and Calcium-Smectite Soil Sci. Soc. Am. J., September 20, 2006; 70(6): 1889 - 1895. [Abstract] [Full Text] [PDF]

				M. Cruz-Guzman, R. Celis, M. C. Hermosin, P. Leone, M. Negre, and J. Cornejo Sorption-Desorption of Lead (II) and Mercury (II) by Model Associations of Soil Colloids Soil Sci. Soc. Am. J., September 1, 2003; 67(5): 1378 - 1387. [Abstract] [Full Text] [PDF]

				H. Li, G. Sheng, B. J. Teppen, C. T. Johnston, and S. A. Boyd Sorption and Desorption of Pesticides by Clay Minerals and Humic Acid-Clay Complexes Soil Sci. Soc. Am. J., January 1, 2003; 67(1): 122 - 131. [Abstract] [Full Text] [PDF]

				L. Cox, A. Cecchi, R. Celis, M. C. Hermosin, W. C. Koskinen, and J. Cornejo Effect of Exogenous Carbon on Movement of Simazine and 2,4-D in Soils Soil Sci. Soc. Am. J., November 1, 2001; 65(6): 1688 - 1695. [Abstract] [Full Text] [PDF]

				L. COX, M. C. HERMOSIN, W. C. KOSKINEN, and J. CORNEJO Interactions of imidacloprid with organic-and inorganic-exchanged smectites Clay Minerals, June 1, 2001; 36(2): 267 - 274. [Abstract] [Full Text] [PDF]

				L. Martin-Neto, D. G. Traghetta, C. M.P. Vaz, S. Crestana, and G. Sposito On the Interaction Mechanisms of Atrazine and Hydroxyatrazine with Humic Substances J. Environ. Qual., March 1, 2001; 30(2): 520 - 525. [Abstract] [Full Text] [PDF]