“…As an example W. Janusz, using 36 Cl radioisotopes, measured a large excess of chloride in comparison with Na + ions adsorbed on CdO in a wide range of pH above the isoelectric point (36). More close to our study, the specific adsorption of chloride ions on freshly prepared hematite was revealed by the displacement of the isoelectric point to lower values upon addition of KCl (37).…”