Liquid ion exchange selectivity of dinonylnaphthalenesulfonic acid (HD) with respect to some lanthanide and actinide ions

Chiarizia, R.; Danesi, P.R.; Raieh, M.; Scibona, G.

doi:10.1016/0022-1902(75)80797-4

“…Figure 6 were repeated at 1 &j HCl and at 0.1 HDNNS. The data (not reported here for brevity) confirmed the inverse second power dependency of the distribution ratios on the aqueous acidity, as in the resin uptake experiments, and the expected fust power dependency on the extractant concentration, which is typical of highly aggregated systems such as HDNNS (21,22).…”

Section: Solvent Extraction Experimentssupporting

confidence: 77%

Radium separation through complexation by aqueous crown ethers and ion exchange or solvent extraction

Chiarizia¹,

Dietz²,

Horwitz

³

et al. 1997

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The effect of three water-soluble, unsubstituted crown ethers (1 5-crown-5 (1 5C5), 18-crown-6 (18C6) and 21-crown-7 (21C7)) on the uptake of Ca, Sr, Ba and Ra cations by a sulfonic acid cation exchange resin, and on the extraction of the same cations by xylene solutions of dmonylnaphthalenesulfonic acid (HDNNS) from aqueous hydrochloric acid solutions has been investigated. The crown ethers enhance the sorption of the larger cations by the ion exchange resin, thereby improving the resin selectivity over calcium, a result of a synergistic interaction between the crown ether and the ionic functional groups of the resin. Similarly, the extraction of the larger alkaline earth cations into xylene by HDNNS is strongly synergized by the presence of the crown ethers in the aqueous phase. Promising results for intra-Group IIa cation separations have been obtained using each of the three crown ethers as the aqueous ligands and the sulfonic acid cation exchange resin.Even greater separation factors for the radium -calcium couple have been measured with the crown-ethers and HDWS solutions in the solvent extraction mode. The application of the uptake and extraction results to the development of radium separation schemes is discussed and a possible flowchart for the determination of 226Ra/22sRa in natural waters is presented.

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“…Figure 6 were repeated at 1 &j HCl and at 0.1 HDNNS. The data (not reported here for brevity) confirmed the inverse second power dependency of the distribution ratios on the aqueous acidity, as in the resin uptake experiments, and the expected fust power dependency on the extractant concentration, which is typical of highly aggregated systems such as HDNNS (21,22).…”

Section: Solvent Extraction Experimentssupporting

confidence: 76%

Radium Separation Through Complexation by Aqueous Crown Ethers and Ion Exchange or Solvent Extraction*

Chiarizia

¹

,

Dietz

²

,

Horwitz

³

et al. 1999

Separation Science and Technology

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The effect of three water-soluble, unsubstituted crown ethers (1 5-crown-5 (1 5C5), 18-crown-6 (18C6) and 21-crown-7 (21C7)) on the uptake of Ca, Sr, Ba and Ra cations by a sulfonic acid cation exchange resin, and on the extraction of the same cations by xylene solutions of dmonylnaphthalenesulfonic acid (HDNNS) from aqueous hydrochloric acid solutions has been investigated. The crown ethers enhance the sorption of the larger cations by the ion exchange resin, thereby improving the resin selectivity over calcium, a result of a synergistic interaction between the crown ether and the ionic functional groups of the resin. Similarly, the extraction of the larger alkaline earth cations into xylene by HDNNS is strongly synergized by the presence of the crown ethers in the aqueous phase. Promising results for intra-Group IIa cation separations have been obtained using each of the three crown ethers as the aqueous ligands and the sulfonic acid cation exchange resin.Even greater separation factors for the radium -calcium couple have been measured with the crown-ethers and HDWS solutions in the solvent extraction mode. The application of the uptake and extraction results to the development of radium separation schemes is discussed and a possible flowchart for the determination of 226Ra/22sRa in natural waters is presented.

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“…The aggregation number (n) of HDDNS in CCI4 was determined from extraction data using a method of slope analysis (13)(14)(15)(16) Condition iv requires both using constant aqueous ionic strength and limiting the concentration of HDDNS.…”

Section: Lumetta Et Almentioning

confidence: 99%

“…the Zn(ll) distribution behavior upon "partial loading provides the primary measure of the extent of HDDNS aggregation.. To interpret this data, we employed slope-analysis methods reported by others (2. [13][14][15][16], but we were particularly interested in exploring the utility of the general least-squares approach represented by the programs SXLSQ (17) and…”

Section: Lumetta Et Almentioning

confidence: 99%

Extraction of Zinc(ii) Ion by Didodecylnaphthalenesulfonic Acid (Hddns) in Carbon Tetrachloride: The Role of Aggregation

Lumetta

¹

,

Moyer

²

,

Johnson

³

et al. 1991

Solvent Extraction and Ion Exchange

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Liquid ion exchange selectivity of dinonylnaphthalenesulfonic acid (HD) with respect to some lanthanide and actinide ions

Cited by 36 publications

References 8 publications

Radium separation through complexation by aqueous crown ethers and ion exchange or solvent extraction

Radium separation through complexation by aqueous crown ethers and ion exchange or solvent extraction

Radium Separation Through Complexation by Aqueous Crown Ethers and Ion Exchange or Solvent Extraction*

Extraction of Zinc(ii) Ion by Didodecylnaphthalenesulfonic Acid (Hddns) in Carbon Tetrachloride: The Role of Aggregation

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