A microcomputer program to evaluate the saturation of complex solutions with respect to biominerals

Area of Science:

• Geochemistry
• Biomineralization
• Computational Chemistry

Background:

• Accurate calculation of mineral-solution interactions is crucial for understanding biomineralization processes.
• Existing models often struggle with complex systems involving ion-pair formation and diverse species.

Purpose of the Study:

• To develop a versatile computational tool for assessing mineral saturation in biological systems.
• To incorporate ion-pair formation and handle a wide range of chemical species.

Main Methods:

• A program written in BASIC was developed for calculating ionic activity products and saturation degrees.
• The program accounts for ion-pair formation between anions and cations.
• It handles an unlimited number of constituent species and ensures mass and charge balance.

Main Results:

• The program successfully computes saturation states for mineral-solution systems, including those with challenging ion ratios.
• It accurately models systems with ion-pair formation.
• The software demonstrates flexibility for adaptation to various mineral-solution interactions.

Conclusions:

• The developed BASIC program provides a robust and adaptable method for calculating mineral saturation in biologically relevant solutions.
• It effectively addresses the complexities of ion-pair formation and diverse chemical species.
• This tool can be readily applied to a broad spectrum of geochemical and biomineralization studies.