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- W2000937884 abstract "Fluxes of trivalent rare earth ions (Sc3+, Y3+, La3+, Pr3+, Sm3+, Tb3+, Er3+ and Lu3+) across cellulose triacetate membranes containing a plasticizer were determined using benzoylacetone, dibenzoylmethane and benzoyl-, thenoyl- and furoyltrifluoracetone as carriers. The transport of rare earths was coupled to a flow of hydrogen ions. Effect of pH on the flux of rare earths was examined by changing the pH of the feed solution. The transport of scandium occurred at lower pH than that of yttrium and lanthanum. Transport of rare earths using the trifluoroacetone derivatives was observed at lower pH than when benzoylacetone or dibenzoylmethane were used. At pH 5.1 and 6.1, benzoyl- and thenoyltrifluoroacetone exhibited an appreciable flux of rare earths; however, no significant difference in flux among the rare earths was recognized, with the exception of scandium. At pH 7.3 and 8.2, relatively low fluxes were observed for the membranes containing benzoylacetone and dibenzoylmethane, and no transport of some lanthanides occurred. In the competitive transport of scandium and lanthanum, the flux ratio of scandium to lanthanum was higher than that obtained by single rare earth transport." @default.
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- W2000937884 date "1989-03-01" @default.
- W2000937884 modified "2023-10-10" @default.
- W2000937884 title "Carrier-mediated transport of rare earth ions through cellulose triacetate membranes" @default.
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- W2000937884 doi "https://doi.org/10.1016/s0376-7388(00)82364-9" @default.
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