Aggregation of complexes formed in the extraction of selected metal cations by P,P{prime}-di(2-ethylhexyl) methanediphosphonic acid
- Argonne National Lab., IL (United States)
- Loyola Univ., Chicago, IL (United States). Dept. of Chemistry
The aggregation of several metal complexes formed during solvent extraction with P,P{prime}-di(2-ethylhexyl) methanediphosphonic acid, H{sub 2}DEH[MDP], in deuterated toluene, has been investigated by small angle neutron scattering (SANS). The SANS results show that the Ca(II)-, Al(III)-, La(III)- and Nd(III)-H{sub 2}DEH[MDP] compounds exhibit little or no tendency to aggregate. Uranyl complexes of H{sub 2}DEH[MDP] at high metal loading form small aggregates with an aggregation number of approximately 14. This behavior is in sharp contrast with the Th(IV)-H{sub 2}DEH[MDP] system which forms large aggregates in the organic phase under high metal loading conditions. The aggregation behavior of the various metal-H{sub 2}DEH[MDP] compounds is discussed in light of the information obtained from earlier solvent extraction, vapor pressure osmometry, and infrared spectroscopy studies.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 343782
- Journal Information:
- Solvent Extraction and Ion Exchange, Journal Name: Solvent Extraction and Ion Exchange Journal Issue: 1 Vol. 17; ISSN 0736-6299; ISSN SEIEDB
- Country of Publication:
- United States
- Language:
- English
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