title: A new method for obtaining adsorption isotherms on colloidal suspensions via electrokinetic sonic amplitude measurement.
abstract: The standard methods for obtaining adsorption isotherms on colloidal suspensions are usually very time consuming and involve a large number of steps and assumptions that increase the experimental errors. In this work, an alternative method is proposed to evaluate the adsorption behavior of electrosteric-stabilized systems based on electrokinetic sonic amplitude signal measurements. The new method, entitled "zeta-sorption", is noticeably less time-consuming when compared to conventional procedures but showed great precision and reliability confirmed by comparison with data obtained from conventional routes on alumina-polyacrylate and alumina-citric acid aqueous suspensions. The experimental conditions that restrict the applicability of the new method were identified and justified by discussing the possible ion exchanges.
authors.affiliation: Department of Metallurgical and Materials Engineering, Escola Politécnica, Universidade de São Paulo, Brazil.
authors.forename: Kleber L
authors.initials: KL
authors.lastname: Guimarães
authors.forename: Ricardo H R
authors.initials: RH
authors.lastname: Castro
authors.forename: Douglas
authors.initials: D
authors.lastname: Gouvêa