• 作者： Hung, Tsung-Min; Lee, Chau-Jen
• 中文摘要： 應用含有二(2-乙基己基)磷酸(Di(2-ethylhexyl)phosphoric acid,簡稱 HDEHP)煤油之固定化載體支式液膜系統,研究自稀溶液中分離三價銪。Eu(III)透過液膜之速率乃由擴散機制控制。在實驗中,使用導電錶監測界面阻力與質傳總阻力。在進料液中的添加劑醋酸鹽和緩衝劑氯化鉀對總質傳的影響,也於實驗中一併探討。在有些情況下,醋酸離子引起濃度極化,而導致質傳速率的衰減,其衰減程度與用導電錶所測隔膜電阻成正比。
• 英文摘要： The transport of Eu(III) in dilute solutions through the supported liquid membrane (SLM) containing di(2-ethylhexyl)phosphoric acid (HDEHP) kerosene as the immobilized carrier was studied. The permeation of Eu(III) across the SLM was predominated by the diffusion controlled mechanism. The transmembrane conductometry was used to detect the interfacial barriers and the resulting mass transfer resistance changes. The effects of acetate ligand and KCI buffer existing in the feed solutions on the rate of Eu(III) permeation were investigated. It was found that in some cases, the existence of acetate in the feed solution actually exhibited retardation in Eu(III) permeation through the SLM. Such effects were traced semi-quantitatively by transmembrane conductivity measurement. The effect of unexpected flux retardation may be attributed to the concentration polarization of acetate ions.
• 中文關鍵字： 液膜; 濃度極化; 耦合加促傳送; 擴散; 銪
• 英文關鍵字： Liquid Membrane; Concentration Polarization; Coupled Facilitated Transport; Diffusion; Europium