Efect of cations on permeant flow-through bentonite clays using a rapid filter press test

摘要

The relative effects of different cations on permeant flow through two commercially available Wyoming bentonite clays have been assessed using a rapid filter press (RFP) test. The clays were exposed to test solutions of sodium, potassium calcium ammonium and zinc ions, all added as acetates at different molarities, so that the relative effects on flow rates could be determined. Results showed that ammonium and potassium had particularly deleterious effects on permeant flow for both clays, while solutions of sodium and zinc acetate permeated at much lower rates.