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Journal Articles

Cumulative study on solvent extraction of elements by ${it N,N,N',N'}$-tetraoctyl-3-oxapentanediamide (TODGA) from nitric acid into ${it n}$-dodecane

Zhu, Z.-X.; Sasaki, Yuji; Suzuki, Hideya*; Suzuki, Shinichi; Kimura, Takaumi

Analytica Chimica Acta, 527(2), p.163 - 168, 2004/12

https://doi.org/10.1016/j.aca.2004.09.023
 Times Cited Count：297 Percentile：99.19(Chemistry, Analytical)

The extraction of 75 elements by ${it N,N,N',N'}$-tetraoctyl-3-oxapentanediamide (TODGA) from nitric acid to ${it n}$-dodecane was investigated and discussed concerning distribution ratios (D) of metal ions and their ionic radii. The extractability for elements depends strongly on their oxidation state. Monovalent and pentavalent ions were not extractable. In divalent metal extraction, Ca(II) (ionic radius: 100 pm) showed the highest D value and the D decreased with increase or decrease of the ionic radius. Tri- and tetravalent ions with ionic radii of 87-113 pm and 83-94 pm, respectively, showed the D over 1000, and the extracted chemical forms were determined to be M(TODGA)$$_{3}$$(NO$$_{3}$$)$$_{{it n}}$$ or M(TODGA)$$_{4}$$(NO$$_{3}$$)$$_{{it n}}$$ (${it n}$=3 or 4). The oxonium ions with higher oxidation states than tetravalent one forms the complicated metal-complex with TODGA, and the number of TODGA associated in those extraction reactions was confirmed to be 2 at most.

Journal Articles

Distribution of nitrous acid between tri-n-butyl phosphate/n-dodecane and nitric acid

Uchiyama, Gunzo; Hotoku, Shinobu; Fujine, Sachio

Solvent Extr. Ion Exch., 16(5), p.1177 - 1190, 1998/00

https://doi.org/10.1080/07360299808934575
 Times Cited Count：9 Percentile：47.60(Chemistry, Multidisciplinary)

no abstracts in English

Oral presentation

Regeneration of degraded adsorbents generated in MA(III) separation and evaluation of their reusability

Ogawa, Akihiro*; Arai, Tsuyoshi*; Miyazaki, Yasunori; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki

no journal, , 

no abstracts in English

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