I will run phreeqc geochemical and hydrogeochemical modelling

I run aqueous geochemical modelling in PHREEQC for groundwater, surface water, and water-rock interaction studies.

What I can model:

• Aqueous speciation and activity calculations
• Mineral saturation indices 
• Mixing models between two or more water sources
• Inverse modelling mass-balance reactions explaining how one water chemistry evolves into another
• Reaction-path / titration modelling
• Ion exchange and simple sorption scenarios

Send your water chemistry data (major ions, pH, temperature, alkalinity Excel or CSV) and tell me the question you're trying to answer. I build the PHREEQC input file(s), run the model, and return:

• The PHREEQC input and output files
• A results table (speciation / SI / mixing proportions, depending on your request)
• A short written interpretation of what the numbers mean for your system
• Figures on request (SI charts, etc. see my separate Geochemical Diagrams gig for Piper/Durov/Stiff plots)
• Suitable for: MSc/PhD thesis chapters, consultancy water-quality reports, and research papers needing a methods-correct geochemical modelling section.

I'm not able to collect field samples or run lab analyses.