Review Visual Minteq protocol, troubleshooting and other methodology information Contact. I looked in the manual, but the information was not present. Software Profile: Visual MINTEQ. User Manual Supplement for Version 4. The model is useful for calculating the minteq software mass distribution among dissolved species, adsorbed species, and multiple solid phases under a variety of conditions including a gas phase with constant partial pressures.
Release Notes – changes and known deficiencies. A comprehensive data base is included that is adequate for solving a broad range of problems without need for additional user-supplied equilibrium constants. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. All rights reserved Site map Contact us. TXT for important installation instructions. MINTEQ can accept a finite mass for any solid considered for dissolution and will dissolve the specified solid phase only until its initial mass is exhausted.
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An official website of the United States government. Release Notes – changes and known deficiencies Operating System: These activities are then fed to the solubility submodel, which calculates ion activity products for minfeq and minerals.
The data base of reactions is written minteq software terms of these components as reactants.
May Development Status: All of the minteq software in the aqueous solution forms one phase. Jump to main content. The results from these calculations are used by the mass transfer submodel to calculate the mass of solid that precipitates or dissolves.
Software Profile: Visual MINTEQ
It is impossible to automatically vary the composition of a precipitating solid as the solution composition changes. Every phase is a region with distinct composition and physically definable boundaries. All rights reserved Site map Contact us.
In the event of minteq software environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be ninteq with appropriate information.
Release Notes – changes and softwrae deficiencies. Each system is composed of a number of phases. TXT Summary of functions, theory, and applicability. MINTEQA2 is a equilibrium speciation model that can be used to calculate the equilibrium composition of dilute aqueous solutions in the laboratory or in natural aqueous systems.
MINTEQA2 Equilibrium Speciation Model
In addition, no capability exists to consider solid solutions or to model high ionic strength brine minnteq. We’ve made some changes to EPA. User Manual Supplement for Version 4. The model is useful for calculating the minteq software mass distribution among dissolved species, adsorbed species, and multiple solid phases under a variety of conditions including a gas phase with constant partial pressures.
Contact Us to ask a question, provide feedback, or report a problem.
General Release Development Information: Rules for end-users are sofware here. A comprehensive data base is included that is adequate for solving a minteq software range of problems without need for additional user-supplied equilibrium constants.
MINTEQ softwqre designed to solve geochemical equilibria for systems composed of one kilogram of water, various amounts of material dissolved in solution, and any solid materials that are present.
You will need Adobe Acrobat Reader, available as a free download, to view some files in this list. Setup file for version 4. MINTEQ can accept a finite mass for any solid considered for dissolution and will dissolve the specified solid phase only minnteq its initial mass is exhausted.
To submit a request, click below on the link minteq software the version you wish to order.
TXT for important installation instructions. In these systems the masses of solid phases that precipitate at earlier pore volumes can be dissolved at later pore volumes according to thermodynamic constraints imposed by the solution composition and solid phases present. The system is then ninteq directly using the Newton-Raphson technique. The gas phase is composed of any gaseous material present, and structurally distinct solid forms a separate phase. Due to a lapse in minteq software, EPA websites will not be regularly updated.
TXT Important sofware and usage information.
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Version 3 represents a major new release. The interface code has been completely rewritten in VB.NET. The download and installation procedures have changed, and a number of new options has also been introduced. The help file has been updated, and a new user guide is being written; a draft, still not yet complete, is included in the download. Below there is a list of all major changes compared to version 2.6:
Installer and file locations. Version 3 comes with a different installer, which should (in most cases) work more reliably than the old installer. The default location of the downloaded files is in the Program Files folder. When starting the application for the first time, the user will be asked where he/her would like to have the user-editable files located. The default location is in the My Documents folder.
Species tableau. A new table presents the species added to the problem in the form of a tableau, which includes information on the stoichiometry, log K and reaction enthalpy of each species. This tableau is accessible from the component list page.
Option to add a component as an element. A frequently asked question from users has been why it has not been possible to add, for example, arsenate as As(V) (i.e. as arsenic, with a molecular weight as for elemental As) rather than as AsO4-3, which is the standard component for As(V). This is now possible. It means, for example, that you can import As(V) data from Excel when data are given in ug/l As. Previously you had to recalculate such data to a molar unit before Excel import.
More flexibility for predefined adsorption models. On page 2 of the default parameters menu (accessible from Parameters – Various default settings), users can now define their own parameter sets for surface complexation models (SCM:s). This greatly facilitates parameter input when you are working with any other SCM parameter sets than those included in the download package. The parameter sets are saved as a special text file, ‘admodel.txt’, so that the parameter sets can be shared easily between different users.
Different functionality of the adsorption isotherms. The adsorption isotherms remained an underdeveloped part of the 2.xx versions of Visual MINTEQ. It was possible to define many isotherms, but with the important restriction that the dissolved entity of the adsorbate had to be supplied as its free ion activity. Commonly, however, adsorption isotherms are defined using the total dissolved concentration of the adsorbate. From version 3.0, only the linear Kd and Freundlich-type models are included in Visual MINTEQ. For these models it is possible to choose between the free ion activity and the total dissolved concentration as the basis of the calculations.
Saturation indexes for minerals in sweep problems. It is now possible to choose to have the saturation indexes of different minerals listed in the sweep output file.