ABSTRACT

The origin of the surface charge and electric surface prop-

erties of solid inorganic oxides in aqueous electrolyte

solutions are fairly well known. Main mechanisms of the

generation of the surface charge in such systems are

either the loss (-SO2) or the gain (SOH2 þ) of proton by

surface hydroxilic groups (-SOH) due to their reactions

of acid-base equilibria with water and the adsorption of

the background electrolyte ions (Kþ and A2) on ionized hydroxilic groups (-SO2-Kþ and -SOH2

þ-A2). But the mechanisms operating in nonaqueous solutions are not

clearly understood.