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 Streck, T. Articles by Richter, J. Search for Related Content PubMed Articles by Streck, T. Articles by Richter, J. Agricola Articles by Streck, T. Articles by Richter, J.

Heavy Metal Displacement in a Sandy Soil at the Field Scale: II. Modeling

Dep. of Geoecology, Technical Univ. Carolo-Wilhelmina, 38106 Braunschweig, Germany

^* Corresponding author (t.streck{at}tu-bs.de).

ABSTRACT

Although several studies have tested leaching models on field-scale data, a comparable case study on heavy metal transport has not yet been undertaken. Data concerning heavy metal displacement after 29 yr of controlled wastewater irrigation were used to compare several simple modeling approaches to predict total and solution phase concentration profiles in the soil. Approaches employed comprise parallel soil column (PSC) models and the application of the convection dispersion equation at the field scale (CD). The PSC simulations were either realized by one-dimensional (ID) simulations at points in the field where soil properties had been determined experimentally (grid model; GM) or by the Monte-Carlo (MC) method. Sorption was described with an extended Freundlich equation as a function of the spatially variable soil properties organic C content and pH. The CD simulations were based on conventional sorption isotherms of mixed samples determined in laboratory batch experiments. Cadmium profiles predicted by the PSC models agree very well with measured profiles, while leaching of Zn was somewhat underestimated. Grid model and MC simulations yielded largely similar results if correlation of random variables was considered in the MC simulations. In the PSC simulations no parameters were fitted to the measured concentration profiles. Agreement between CD simulations and measured data could only be achieved by adjusting the dispersion length to a value in the upper range of values found in the literature.

This article has been cited by other articles:

				I. Vogeler Copper and Calcium Transport through an Unsaturated Soil Column J. Environ. Qual., May 1, 2001; 30(3): 927 - 933. [Abstract] [Full Text] [PDF]