Is it possible to model zeta potential independent of ionic strength

[Laknesh]

Hello

I measured zeta potential of suspensions in NaOH solution for different ionic strength. The measured zeta potential are independent of ionic strength and pH. I would like to model the experimental data using surface complexation model either diffuse layer or CD-MUSIC.  Is it possible to model the data.
Could you please help on this.

Thank you in advance.

Kind regards
Laknesh

[dlparkhurst]

PHREEQC will calculate the charge on a SURFACE, given the definitions of surface complexation reactions and surface properties. PHREEQC always considers ionic strength in the calculation of the activites of aqueous species, which in turn are used in the calculation of surface complexation. There is an option to ignore the work involved in making a charged surface species (-no_edl), although logically, this work should be considered.

[Laknesh]

Dear Parkhurst

Thank you very much for the reply. I will consider it.

Kind regards
Laknesh