APLICATIONS OF ACID-BASE TITRATION IN DETERMINATION OF SURFACE CHARGE FOR ALUMINA
The presence of alumina in the natural aquatic environments increases its
applications in drinking and wastewater purification, in ceramics due to the interactions
with organic and inorganic ions. The chemistry of alumina reactions in water is complex.
The adsorption ability of alumina might be influenced by surface characteristics of the
adsorbent (surface properties, density and pore volume, pore distribution, porosity,
pH
PZC) as well as by the ionic strength, the pH of the solution, and the physiochemical
properties of adsorbents.
The aim of the study is to evaluate the point of zero charge (pHPZC) for alumina
using the potentiometric “acid-base” titration and NaNO3 like electrolyte solution. The
pHPZC for alumina was found to be 7.2, in a good correlation with the results obtained by
other researchers.