Sequestering ability of polyaminopolycarboxylic ligands towards dioxouranium(VI) cation.

Antonio Gianguzza, Alberto Pettignano, Demetrio Milea, Silvio Sammartano, Concetta De Stefano

Risultato della ricerca: Article

29 Citazioni (Scopus)

Abstract

In the present paper, some results of an investigation (at t=25◦C by potentiometry, ISE-H+ glass electrode) on the sequestering ability of five different polyaminopolycarboxylic ligands [Nitrilotriacetate (NTA), ethylenediamine-N,N,N ,N -tetraacetate (EDTA), ethylene glycol-bis(2-aminoethylether)-N,N,N ,N -tetraacetate (EGTA), diethylenetriamine-N,N,N ,N ,N -pentaacetate (DTPA), triethylenetetraamine- N,N,N ,N ,N ,N -hexaacetate (TTHA)] towards dioxouranium(VI) cation in sodium chloride aqueous solutions, at I = 0.7 mol L−1 are reported. Calculations performed on potentiometric data gave evidence of the formation of the following species (log β in parenthesis):UO2(NTA)H0 (12.27); UO2(NTA)− (8.21); UO2(NTA)OH2− (2.39); UO2(EDTA)H− (15.19); UO2(EDTA)2− (9.81); UO2(EDTA)OH3− (3.58); UO2(EGTA)H− (17.35); UO2(EGTA)2− (11.60); UO2(EGTA)OH3− (2.77); UO2(DTPA)H2 − (22.14); UO2(DTPA)H2− (17.86); UO2(DTPA)3− (11.79); UO2(DTPA)OH4− (3.09); UO2(TTHA)H3 − (28.41); UO2(TTHA)H2 2− (24.73); UO2(TTHA)H3− (19.14); UO2(TTHA)4− (12.12). In presence of complexones, the formation of scarcely soluble species occurs at higher pH values than in simple UO2 2+ aqueous solutions. The stability of dioxouranium(VI)–polyaminopolycarboxylate species follows the trend: TTHA > DTPA> EGTA> EDTA>NTA, it is dependent on the ligand structure and this dependence was modeled. Polyaminopolycarboxylate ligands are good sequestering agents towards UO2 2+, indicating the possibility of being employed in the UO2 2+ polluted sites remediation, and in the chelating therapy in medicine. A literature data critical evaluation was made, evidencing the high discrepancies occurring between different authors in both the stability constant values and the proposed speciation models.
Lingua originaleEnglish
pagine (da-a)93-104
Numero di pagine12
RivistaJournal of Alloys and Compounds
Volume424
Stato di pubblicazionePublished - 2006

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Pentetic Acid
Ethylenediaminetetraacetic acid
Egtazic Acid
Cations
Edetic Acid
Positive ions
Ligands
ethylenediamine
Sequestering Agents
Sodium chloride
Chelation
Medicine
Sodium Chloride
triethylenetetraminehexaacetic acid
dioxouranium(VI)
Glass
Electrodes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys
  • Mechanical Engineering

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Sequestering ability of polyaminopolycarboxylic ligands towards dioxouranium(VI) cation. / Gianguzza, Antonio; Pettignano, Alberto; Milea, Demetrio; Sammartano, Silvio; De Stefano, Concetta.

In: Journal of Alloys and Compounds, Vol. 424, 2006, pag. 93-104.

Risultato della ricerca: Article

@article{192967609d8546819d618fa38ff5a58b,
title = "Sequestering ability of polyaminopolycarboxylic ligands towards dioxouranium(VI) cation.",
abstract = "In the present paper, some results of an investigation (at t=25◦C by potentiometry, ISE-H+ glass electrode) on the sequestering ability of five different polyaminopolycarboxylic ligands [Nitrilotriacetate (NTA), ethylenediamine-N,N,N ,N -tetraacetate (EDTA), ethylene glycol-bis(2-aminoethylether)-N,N,N ,N -tetraacetate (EGTA), diethylenetriamine-N,N,N ,N ,N -pentaacetate (DTPA), triethylenetetraamine- N,N,N ,N ,N ,N -hexaacetate (TTHA)] towards dioxouranium(VI) cation in sodium chloride aqueous solutions, at I = 0.7 mol L−1 are reported. Calculations performed on potentiometric data gave evidence of the formation of the following species (log β in parenthesis):UO2(NTA)H0 (12.27); UO2(NTA)− (8.21); UO2(NTA)OH2− (2.39); UO2(EDTA)H− (15.19); UO2(EDTA)2− (9.81); UO2(EDTA)OH3− (3.58); UO2(EGTA)H− (17.35); UO2(EGTA)2− (11.60); UO2(EGTA)OH3− (2.77); UO2(DTPA)H2 − (22.14); UO2(DTPA)H2− (17.86); UO2(DTPA)3− (11.79); UO2(DTPA)OH4− (3.09); UO2(TTHA)H3 − (28.41); UO2(TTHA)H2 2− (24.73); UO2(TTHA)H3− (19.14); UO2(TTHA)4− (12.12). In presence of complexones, the formation of scarcely soluble species occurs at higher pH values than in simple UO2 2+ aqueous solutions. The stability of dioxouranium(VI)–polyaminopolycarboxylate species follows the trend: TTHA > DTPA> EGTA> EDTA>NTA, it is dependent on the ligand structure and this dependence was modeled. Polyaminopolycarboxylate ligands are good sequestering agents towards UO2 2+, indicating the possibility of being employed in the UO2 2+ polluted sites remediation, and in the chelating therapy in medicine. A literature data critical evaluation was made, evidencing the high discrepancies occurring between different authors in both the stability constant values and the proposed speciation models.",
author = "Antonio Gianguzza and Alberto Pettignano and Demetrio Milea and Silvio Sammartano and {De Stefano}, Concetta",
year = "2006",
language = "English",
volume = "424",
pages = "93--104",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Sequestering ability of polyaminopolycarboxylic ligands towards dioxouranium(VI) cation.

AU - Gianguzza, Antonio

AU - Pettignano, Alberto

AU - Milea, Demetrio

AU - Sammartano, Silvio

AU - De Stefano, Concetta

PY - 2006

Y1 - 2006

N2 - In the present paper, some results of an investigation (at t=25◦C by potentiometry, ISE-H+ glass electrode) on the sequestering ability of five different polyaminopolycarboxylic ligands [Nitrilotriacetate (NTA), ethylenediamine-N,N,N ,N -tetraacetate (EDTA), ethylene glycol-bis(2-aminoethylether)-N,N,N ,N -tetraacetate (EGTA), diethylenetriamine-N,N,N ,N ,N -pentaacetate (DTPA), triethylenetetraamine- N,N,N ,N ,N ,N -hexaacetate (TTHA)] towards dioxouranium(VI) cation in sodium chloride aqueous solutions, at I = 0.7 mol L−1 are reported. Calculations performed on potentiometric data gave evidence of the formation of the following species (log β in parenthesis):UO2(NTA)H0 (12.27); UO2(NTA)− (8.21); UO2(NTA)OH2− (2.39); UO2(EDTA)H− (15.19); UO2(EDTA)2− (9.81); UO2(EDTA)OH3− (3.58); UO2(EGTA)H− (17.35); UO2(EGTA)2− (11.60); UO2(EGTA)OH3− (2.77); UO2(DTPA)H2 − (22.14); UO2(DTPA)H2− (17.86); UO2(DTPA)3− (11.79); UO2(DTPA)OH4− (3.09); UO2(TTHA)H3 − (28.41); UO2(TTHA)H2 2− (24.73); UO2(TTHA)H3− (19.14); UO2(TTHA)4− (12.12). In presence of complexones, the formation of scarcely soluble species occurs at higher pH values than in simple UO2 2+ aqueous solutions. The stability of dioxouranium(VI)–polyaminopolycarboxylate species follows the trend: TTHA > DTPA> EGTA> EDTA>NTA, it is dependent on the ligand structure and this dependence was modeled. Polyaminopolycarboxylate ligands are good sequestering agents towards UO2 2+, indicating the possibility of being employed in the UO2 2+ polluted sites remediation, and in the chelating therapy in medicine. A literature data critical evaluation was made, evidencing the high discrepancies occurring between different authors in both the stability constant values and the proposed speciation models.

AB - In the present paper, some results of an investigation (at t=25◦C by potentiometry, ISE-H+ glass electrode) on the sequestering ability of five different polyaminopolycarboxylic ligands [Nitrilotriacetate (NTA), ethylenediamine-N,N,N ,N -tetraacetate (EDTA), ethylene glycol-bis(2-aminoethylether)-N,N,N ,N -tetraacetate (EGTA), diethylenetriamine-N,N,N ,N ,N -pentaacetate (DTPA), triethylenetetraamine- N,N,N ,N ,N ,N -hexaacetate (TTHA)] towards dioxouranium(VI) cation in sodium chloride aqueous solutions, at I = 0.7 mol L−1 are reported. Calculations performed on potentiometric data gave evidence of the formation of the following species (log β in parenthesis):UO2(NTA)H0 (12.27); UO2(NTA)− (8.21); UO2(NTA)OH2− (2.39); UO2(EDTA)H− (15.19); UO2(EDTA)2− (9.81); UO2(EDTA)OH3− (3.58); UO2(EGTA)H− (17.35); UO2(EGTA)2− (11.60); UO2(EGTA)OH3− (2.77); UO2(DTPA)H2 − (22.14); UO2(DTPA)H2− (17.86); UO2(DTPA)3− (11.79); UO2(DTPA)OH4− (3.09); UO2(TTHA)H3 − (28.41); UO2(TTHA)H2 2− (24.73); UO2(TTHA)H3− (19.14); UO2(TTHA)4− (12.12). In presence of complexones, the formation of scarcely soluble species occurs at higher pH values than in simple UO2 2+ aqueous solutions. The stability of dioxouranium(VI)–polyaminopolycarboxylate species follows the trend: TTHA > DTPA> EGTA> EDTA>NTA, it is dependent on the ligand structure and this dependence was modeled. Polyaminopolycarboxylate ligands are good sequestering agents towards UO2 2+, indicating the possibility of being employed in the UO2 2+ polluted sites remediation, and in the chelating therapy in medicine. A literature data critical evaluation was made, evidencing the high discrepancies occurring between different authors in both the stability constant values and the proposed speciation models.

UR - http://hdl.handle.net/10447/29650

M3 - Article

VL - 424

SP - 93

EP - 104

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -