3. DESCRIPTION OF PROGRAM OR FUNCTION
RIPP2 is a user-friendly interface for the geochemical modelling code PHREEQE. It allows the easy creation of water chemistry files, containing the water parameters and the elements present in water. It gives the user a
choice of five data bases and subsequently gives the user the specification option available.
PHREEQE is a program for the evaluation of water chemistry and water/rock interaction. It simulates the following type of reactions:
- Addition of reactants to a solution.
- Mixing of two solutions.
- Titrating one solution with another.
- Equilibrating a solution with a mineral phase.
- Estimating solubility and speciation of an element in a solution. - Adjusting pH to obtain charge balance.
The following thermodynamic data bases are available:
PHRTHERM: The PHREEQE data base: contains a limited range of ele- ments. Minerals section contains data for the calcula- tion of oxidation potentials. N, S and C redox systems are de-coupled (31 master elements).
NA10289: Pearson's data base: the minerals section contains data for the calculation of oxidation potential (31 master elements).
NEWTHERM: This data base has a fully wide range of elements. All redox systems are fully coupled (50 master elements).
HATCHES: Harwell thermodynamic data base: all redox systems fully (coupled) coupled. Am, Ni, Pd, Mo, Nb have been added (59 master elements.
HATCHES: Harwell thermodynamic data base: N, S and C redox (decoupled) systems fully decoupled (63 master elements).