CHIDAM -A software for CHemical Interpretation of the Dissolved ions in Aqueous Media

Abstract

The chief constituents in water samples are obtained by the geochemical analysis. The results are then studied for various utility purposes, such as domestic, drinking, and agriculture. The results are also studied for understanding the thermodynamic states to determine geochemistry and the nature of the reactions. There are several software's available for this purpose, but still they do not include all the required parameters for the classification purpose or all the popular diagrams basically required for the study. In this context a software was coded in C++ and compiled in Visual C for the basic interpretation of the geochemical data, considering the utility thermodynamic nature and classification of water. The input data includes Ca, Mg, Na, K, Cl, HCO3, SO4, F, NO3, Si, TDS, EC, pH and Temperature. The output of the software presents the parameters like I.B.E. (Index to Base Exchange), Schollers water type, R.S.C. (Residual sodium carbonate), S.A.R. (Sodium Adsorption Ratio), N.C.H. (Non Carbonate Hardness), P.I, (Permeability Index), K.R. (Kellys Ratio), P.S. (Potential Salinity), M.H. (Magnesium hazard), S.S.P. (Soluble Sodium Percentage) and Na% (Sodium Percentage). The software also calculates the Scholler Classification, Corrositvity ratio, Chloride Classification, Cation, Anion facies and Handas Classification for each sample. The corrosive nature of the water sample is also determined by the software by calculating Puckorius Scaling index, Ryznar stability index, Larson-Skold index, Langelier saturation index and Aggressive index for each sample. Activity coefficient, Ionic activity and silicate stability diagrams were designed in the output. Later the total number samples were grouped based on the standard classification adopted for each calculated parameter. Standard diagrams like USSL, Johnsons plot, Gibbs, Doneens, other thermodynamic plots for Na, K, Mg for silicate system also form the output of the software. The output are saved in different files as opted during the execution of the program.