The effect of background anion on cation exchange reactions, suchas Na-Ca and Na-Cu exchange reac- tions, on montmorillonites has beenstudied, but the results are not always clear and discrepancies existin the literat...The effect of background anion on cation exchange reactions, suchas Na-Ca and Na-Cu exchange reac- tions, on montmorillonites has beenstudied, but the results are not always clear and discrepancies existin the literature. In this study, the exchange of zinc (Zn^2+) forsodium (Na^+) on Wyoming montmorillonite was investigated at 298 deg.K using Cl^-, ClO_4^-, NO_3^-, Oac^-, and SO_4~2- solution media at aconstant total metal charge concentration of 0.02000 mol_c L^-1.Results indicated that the clay CEC values were essential similar forCl^-, ClO_4^-, NO_3^- and SO_4~2- solution media with an average CECof 0.856±0.008 mol_c kg^-1; in an OAc^- solution the clay CEC wasmuch higher than that in other anion media.展开更多
文摘The effect of background anion on cation exchange reactions, suchas Na-Ca and Na-Cu exchange reac- tions, on montmorillonites has beenstudied, but the results are not always clear and discrepancies existin the literature. In this study, the exchange of zinc (Zn^2+) forsodium (Na^+) on Wyoming montmorillonite was investigated at 298 deg.K using Cl^-, ClO_4^-, NO_3^-, Oac^-, and SO_4~2- solution media at aconstant total metal charge concentration of 0.02000 mol_c L^-1.Results indicated that the clay CEC values were essential similar forCl^-, ClO_4^-, NO_3^- and SO_4~2- solution media with an average CECof 0.856±0.008 mol_c kg^-1; in an OAc^- solution the clay CEC wasmuch higher than that in other anion media.
