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- a rhizosphere model with chemical speciation

The new rhizosphere model RhizoMath has been developed in the mathematical package MATLAB that is coupled to the geochemical code PHREEQC. It has two main modules: the initialization module that determines using inverse modeling sorption parameters describing the chemical speciation in the solution at the beginning of the experiment, and (ii) the coupled speciation and transport module that solves the problem of plant uptake, transport and speciation in the rhizosphere by alternating between transport and speciation calculations. Chemical speciation is calculated in both modules using PHREEQC.

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