Combined Application of Radiochemical and Electrochemical Methods for the Investigation of Solid/Liquid Interfaces

Comparative study of the adsorption of SO42-/HSO4- and Cl−

“…The adsorption of sulfate/bisulfate and chloride ions on Pt(poly) electrode surface with small roughness factor (γ<2) by using radiotracer methods is a well-known and widely studied phenomenon [4,5,15,16,18]. In this section, the most important results of some anion (HSO 4 -/SO 4 2-…”

“…A combined radio-electrochemical cell -developed by Varga and coworkers [34,36,38,39] -was applied for the adsorption experiments using in-situ thing gap method. The calculation of the surface excess values of sulfate/bisulfate and chloride ions took place on the basis of the intensity measurment of the emitted β¯-radiation of 35 S (E max = 167 keV) and 36 Cl (E max = 714 keV) radionuclides used for labelling.…”

“…The radiation intensity increment measured is proportional to the entered quantity. The most often applied pure  -emitting radioisotopes in these measurements are 3 H [7,8], 14 C [9-12], 32 P [13,14], 35 S [4,5,13,[15][16][17][18][19][20][21][22][23][24][25] and 36 Cl [13,16,22,[25][26][27][28][29][30][31][32].…”

“…However, the original thin gap method was elaborated to study the adsorption on smooth surfaces. This fact implies that there were some strong limitations of the applicability of the original method considering both labelled species and metallic constructional materials to be investigated [34,35]. For instance, the thin gap version of the above procedure did not allow to measure the adsorption/desorption processes and to determine quantitatively the surface excess () values of labelled species having low specific activity (chloride labelled with 36 Cl) on smooth surfaces (roughness factor2).…”