Modeling of rhizosphere processes
Abstract
The rhizosphere, i.e. the soil in the vicinity of a plant root, is a highly dynamic system, where many different processes contribute to the uptake of certain elements. Plant roots exploiting their surrounding medium can be of benefit when used to extract metals/metalloids from contaminated soil. Mathematical modeling is a powerful tool to investigate the underlying processes in the rhizosphere contributing to metal/metalloid bioavailability and uptake. Scope of this project is to improve the understanding of rhizosphere processes contributing to metal/metalloid bioavailability to selected hyperaccumulator and phytoremediation crops. An appropriate tool to address this are mechanistic rhizosphere models that simulate concentration gradients in the rhizosphere and uptake. Objectives of this project to set up mathematical formulations of single root models for metal/metalloid uptake, to find numerical algorithms, to create a computer simulation model, to validate this model using independent experimental data and to carry out sensitivity analyses. Innovations expected are the use of a pde-solver, a software package that solves partial differential equations (pde¿s) automatically, which makes the cycle of model building-simulation-validation more efficient (¿rapid prototyping¿). With this tool, the most significant processes related to metal/metalloid bioavailability will be evaluated. Based on these results, a computer simulation program will be created. The mathematical formulations used will combine existing modeling approaches and include processes that have not been mathematically described in rhizosphere models before. Results of this project will help to gain an understanding of processes occurring in the rhizosphere of plant species taking up inorganic contaminants, in particular, phytoextraction. Understanding and prediction of processes in the rhizosphere and uptake strategies are considered key features in developing phytoremediation technologies.
Publikationen
Root morphological characteristics of Nickel hyperaccumulator THLASPI GOESINGENSE
Autoren: Himmelbauer, M.L., Puschenreiter, M., Schnepf, A., Loiskandl, W., Wenzel, W.W. Jahr: 2003
Conference & Workshop proceedings, paper, abstract
Modeling rhizosphere processes involved in metal and metalloid bioavailability and plant uptake.
Autoren: Schnepf A., Himmelbauer M., Loiskandl W., Wenzel W.W., Jahr: 2003
Conference & Workshop proceedings, paper, abstract
Desorption isotherms for modeling rhizosphere processes
Autoren: Molina Millán, I., Fitz, W.J., Unterbrunner, R., Wenzel, W.W. Jahr: 2005
Conference & Workshop proceedings, paper, abstract
Implementation of a rhizopshere model in Orchestra
Autoren: Schnepf, A., Himmelbauer, M.L., van Beinum, W., Loiskandl, W., Unterbrunner, R., Wenzel, W.W. Jahr: 2005
Conference & Workshop proceedings, paper, abstract
Root morphology of Thlaspi goesingense Halacsy grown on a serpentine soil.
Autoren: Himmelbauer M., Puschenreiter M., Schnepf A., Loiskandl W., Wenzel W.W. Jahr: 2005
Journal articles
Changes of Ni biogeochemistry in the rhizosphere of the hyperaccumulator Thlaspi goesingense
Autoren: Puschenreiter, M., Schnepf, A., Molina Millán, I., Fitz, W.J., Horak, O., Klepp, J., Schrefl, T., Lombi, E., Wenzel, W.W. Jahr: 2005
Journal articles
Model development for simulating the bioavailability of Ni to the hyperaccumulator Thlaspi goesingense
Autoren: Schnepf, A., Himmelbauer, M.L., Puschenreiter, M., Schrefl, T., Lombi, E., Fitz, W.J., Loiskandl, W., Wenzel, W.W. Jahr: 2005
Chapter in collected volumes
The suitability of pde-solvers in rhizosphere modeling, exemplified by three mechanistic rhizosphere models
Autoren: Schnepf, A; Schrefl, T; Wenzel, WW Jahr: 2002
Journal articles
Project staff
Willibald Loiskandl
Univ.-Prof. i.R. Dipl.-Ing. Dr.nat.techn. Willibald Loiskandl
willibald.loiskandl@boku.ac.at
Project Leader
01.01.2003 - 15.02.2006
Margarita Himmelbauer
Dipl.-Ing. Dr.nat.techn. Margarita Himmelbauer
margarita.himmelbauer@boku.ac.at
Project Staff
01.01.2003 - 15.02.2006
Andrea Schnepf
Priv.-Doz. Dipl.-Ing. Dr.nat.techn. Andrea Schnepf MSc.
andrea.schnepf@boku.ac.at
Project Staff
01.01.2003 - 15.02.2006
Walter Wenzel
Univ.Prof. Dipl.-Ing. Dr.nat.techn. Walter Wenzel
walter.wenzel@boku.ac.at
Tel: +43 1 47654-91143, 91161
Project Staff
01.01.2003 - 15.02.2006
BOKU partners
External partners
Austrian Research Centers
none
partner
University of Technology Vienna, Institute for Theoretical Physics, Vienna
none
partner