- Tytuł:
- Effect of coexisting sodium ion extractive separation of metal ions with calix[4]arene tetracarboxylic acid
- Autorzy:
-
Ohto, K.
Shioya, A.
Higuchi, H.
Oshima, T.
Inoue, K. - Powiązania:
- https://bibliotekanauki.pl/articles/346949.pdf
- Data publikacji:
- 2002
- Wydawca:
- Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
- Tematy:
-
calix[4]arene
metal separation
solvent extraction
coexisting sodium ion - Opis:
- Solvent extraction of metal ions with calix[4]arene tetracarboxylic acid has been carried out to elucidate effect of coexisting sodium ion. Extraction of metal ions examined, Pb(II), Fe(III), Cu(II), Zn(II), Ni(II), and Co(II), is enhanced by the addition of sodium ion. The enhancement degree of the metal extraction is not necessarily in proportion to the added sodium concentration. The addition of trace amount of sodium ion is necessary to specifically complex for calix[4]arene tetracarboxylic acid and to enhance the extraction ability. However, the addition of excessive amounts of sodium suppresses the extraction of other metal ions, since they act as a competitive ion with other metal ions; The relation between extractive pH1/2 of metal ions and sodium concentration is shown. Mutual separation of metal ions by using additional sodium ion is also investigated. Although complete mutual separation of three metal ions, Pb(II), Cu(II), and Zn(II), has not been achieved, the possibility that the sodium addition will enhance not only the extraction ability but also the separation efficiency is suggested.
- Źródło:
-
Ars Separatoria Acta; 2002, 1; 61-70
1731-6340 - Pojawia się w:
- Ars Separatoria Acta
- Dostawca treści:
- Biblioteka Nauki
Artykuł