浸透膜近傍におけるイオンの挙動に及ぼす電場の影響について

抄録

Concentration polarization, which occurs at the surface of osmosis membrane utilized in seawater desalination, decreases the filtration. The effects of the external electric fields were examined to decrease concentration polarization. In this study, The computer simulation using lattice Boltzmann method ( LBM ) was conducted to clarify the ion behaviors in the vicinity of the membrane surface. To simulate ion transport adequately, advection with water flow, diffusion in concentration gradient and migration in electric field were considered in the calculation. The results showed that the addition of electric fields decreased the ion concentration in the vicinity of membrane surface. Also, the effect was great in the case of high intensity of the applied field. This implies that the applying electric fields is effective to decrease concentration polarization.