Details

Autor(en) / Beteiligte

• Yang, Wongkang
• Yamauchi, Akira
• Kimizuka, Hideo

Titel

Membrane potential and ion flux in a reverse transport system with a liquid membrane using monensin as a carrier

Ist Teil von

• Journal of membrane science, 1987, Vol.31 (2), p.109-116

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

1987

Quelle

Elsevier ScienceDirect Journals Collection

Beschreibungen/Notizen

• Reverse transport coupled to a chemical reaction was studied with a liquid membrane-electrolyte system. The liquid membrane was prepared by dissolving 10 −2 mol-dm −3 monensin in 1-octanol; it was supported by a Millipore filter. The membrane showed an ideal potential response for Na + and H + cations. A system with the same Na + ion concentrations in both exterior aqueous phases was chosen as the reverse transport system. The membrane potential and the ion flux of the system were measured as functions of time. The results were treated in terms of the membrane equations developed in previous papers. The membrane potential and the ion flux could be described consistently according to equations derived on the assumption of a rapid acid-base reaction taking place at the boundary. It was concluded that the acid-base reaction energy is transformed into an electrochemical potential, and, as a result, the reverse ion flux is apparently driven by the electrochemical potential gradient.