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 Amacher, M. C. Articles by Iskandar, I. K. Search for Related Content PubMed Articles by Amacher, M. C. Articles by Iskandar, I. K. Agricola Articles by Amacher, M. C. Articles by Iskandar, I. K.

Kinetics of Chromium(VI) and Cadmium Retention in Soils; a Nonlinear Multireaction Model

Agronomy Dep., Louisiana Agric. Exp. Stn., Louisiana State Univ. Agric. Center, Baton Rouge, LA 70803

I. K. Iskandar

Geochemical Sciences Branch, U.S. Army CRREL, Hanover, NH 03755

* Corresponding author.

ABSTRACT

A general-purpose, nonlinear, multireaction model capable of predicting kinetic retention data from batch reaction experiments was developed and verified. The model consists of one or two concurrent, reversible nonlinear reactions and a concurrent, irreversible first-order reaction. The model can be extended by adding a consecutive, reversible first-order reaction to one of the reversible nonlinear reactions. Either a three- or five-parameter version of the model described accurately Cr(VI) and Cd retention by several soils at several initial concentrations depending on the element, soil, or initial concentration. The model predicted that a fraction of the reactive solute may be irreversibly retained by soils; this was verified experimentally, albeit in a qualitative manner. A number of reactions compatible with the model can be postulated, although the fit of the model to the data cannot be construed as evidence to prove any one of the processes. A variety of reaction mechanisms may produce experimental or theoretical concentration vs. time curves that are indistinguishable.

Contribution from Hatch Project 2469; Louisiana Agric. Exp. Stn. as manuscript no. 87-09-1328.

Received for publication June 10, 1987.

This article has been cited by other articles:

				J. E. Lopez-Periago, M. Arias-Estevez, J. C. Novoa-Munoz, D. Fernandez-Calvino, B. Soto, C. Perez-Novo, and J. Simal-Gandara Copper Retention Kinetics in Acid Soils Soil Sci. Soc. Am. J., January 11, 2008; 72(1): 63 - 72. [Abstract] [Full Text] [PDF]

				H. Zhang and H. M. Selim Modeling the Transport and Retention of Arsenic (V) in Soils Soil Sci. Soc. Am. J., August 22, 2006; 70(5): 1677 - 1687. [Abstract] [Full Text] [PDF]

				H. M. Selim, G. R. Gobran, X. Guan, and N. Clarke Mobility of Sulfate in Forest Soils: Kinetic Modeling J. Environ. Qual., March 1, 2004; 33(2): 488 - 495. [Abstract] [Full Text] [PDF]

				J. M. Hutchison, J. M. Hutchison, J. C. Seaman, S. A. Aburime, and D. E. Radcliffe Chromate Transport and Retention in Variably Saturated Soil Columns Vadose Zone J., November 1, 2003; 2(4): 702 - 714. [Abstract] [Full Text] [PDF]

				D. G. Strawn and D. L. Sparks Effects of Soil Organic Matter on the Kinetics and Mechanisms of Pb(II) Sorption and Desorption in Soil Soil Sci. Soc. Am. J., January 1, 2000; 64(1): 144 - 156. [Abstract] [Full Text]