Complex formation of iron(III) with diglycolic and iminodiacetic acids

Napoli, Aldo

doi:10.1016/0022-1902(72)80076-9

Cited by 21 publications

(9 citation statements)

References 24 publications

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“…Fe 3+ acts as a promoter because [Fe(ida)(H 2 O) 3 ] + has the very high stability constant (logβ 1 is 10.72). 23 The values of the observable reaction rate constants ( k obs ) increased with the Fe 3+ concentration and the temperature (Table 1), which was consistent with the formation of the proposed intermediate complex (Figure 2). The values of the observable rate constants were calculated using the “Glint” program by the global analysis method based on the A → B model reaction, which may be described using equation (1)…”

Section: Resultssupporting

confidence: 77%

Aquation reaction of iminodiacetate complex of oxidovanadium(IV) with 2,2’-bipyridine induced by Fe(III) ions: Kinetic studies

Drzeżdżon

Piotrowska-Kirschling

Chmurzyński

et al. 2019

Progress in Reaction Kinetics and Mechanism

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The kinetics of the aquation reaction of the [VO(ida)(bipy)]·2H2O (VO(ida)(bipy)) complex (where ida = iminodiacetate anion and bipy = 2,2’-bipyridine) promoted by [Fe(H2O)6]3+ ions were investigated in aqueous solutions. Spectrophotometric studies were carried out at different temperatures in the range of 293.15–313.15 K. The concentration of the [Fe(H2O)6]3+ (Fe3+) ions was kept within the range of 2 × 10–4 to 8 × 10–4 mol L–1, and the concentration of VO(ida)(bipy) was 1 × 10–3 mol L–1. The values of the observable reaction rate constants were calculated based on the Glint computer program. Furthermore, the mechanism for the aquation of VO(ida)(bipy), induced by Fe(III) ions, has been proposed.

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Section: Resultssupporting

confidence: 77%

Aquation reaction of iminodiacetate complex of oxidovanadium(IV) with 2,2’-bipyridine induced by Fe(III) ions: Kinetic studies

Drzeżdżon

Piotrowska-Kirschling

Chmurzyński

et al. 2019

Progress in Reaction Kinetics and Mechanism

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“…The observed results infer an increased affinity for Fe 3+ by S930+ when compared with UO2 2+ . Formation constants (log10 for the 1:1 Fe 3+ or UO2 2+ complex with iminodiacetic acid in aqueous solution have been reported as 10.72 and 9.90, respectively [26,27]. This higher formation constant for the Fe 3+ -IDA complex suggests that Purolite S930+ will form stronger complexes with Fe 3+ , agreeing with the collected experimental data.…”

Section: Figure 10 Uo2 2+ Saturation Capacity (Mol Lwsr -1 ) With Insupporting

confidence: 84%

Extraction of uranium from non-saline and hypersaline conditions using iminodiacetic acid chelating resin Purolite S930+

Amphlett

Sharrad

Ogden

2018

Chemical Engineering Journal

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Uptake behaviour of uranium from aqueous, acidic sulfate and chloride media on iminodiacetic acid chelating resin Purolite S930+ has been studied. Experiments have followed UO2 2+ , Cu 2+ and Fe 3+ uptake behaviour with respect to acidic and ionic media type and concentration. Uptake suppression of all metals was observed at [H + ] > 0.1 M sourced from H2SO4 and HCl. In contrast, significant uptake of Fe 3+ was observed from solutions with [HCl] > 2 M. Suppression of UO2 2+ uptake (up to 15%) was observed upon increasing [SO4 2-] to 4 M, whilst negligible UO2 2+ uptake suppression was observed with [Cl-] up to 6 M. The impact of Fe 3+ concentration on UO2 2+ extraction under hypersaline conditions ([Cl-] = 22.6 g L-1 , 0.64 M) has been studied and behaviour fit to Langmuir and Dubinin-Radushkevich isotherms. Extended X-ray absorption fine structure (EXAFS) studies have been performed to assess the effect of salinity on the uranium coordination environment on the resin and therefore the mechanism of uptake. No change in surface species was observed, with the fit species being uranyl bound by the iminodiacetic acid functional group in a tridentate motif, with an associated bidentate sulfate group. An isotherm model based on this surface has also been derived. It has been shown that at pH 2 there is little impact of increasing chloride and sulfate concentrations on the extraction behaviour of metals onto Purolite S930+ under the conditions tested. Rather, uranium uptake is more affected by the presence of Fe 3+ in solution. As [Fe 3+ ]/[UO2 2+ ] is increased from 0 to 2, UO2 2+ uptake is reduced by up to 66% at aqueous equilibrium.

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“…Back to our work, it has been previously shown that ligand anions of PDC and AS could form stable complexes with metal cations (e.g. Mg 2+ and Fe 3+ ) 62 , 63 . Therefore, there was reason to believe that a similar effect has taken place in PDC and AS, which also would further promote the formation of LDHs.…”

Section: Resultsmentioning

confidence: 59%

“…If not they will accelerate dissolution of Mg although prevention iron re-plaiting. For examples, tartaric acid inhibitor can form highly stable complexes with Fe 3+ ( = 11.87), most important, the stability of it’s complex with Mg 2+ is relatively poor ( = 1.91) 62 , 63 . Actually, although we briefly discuss the inhibiting mechanism of PDC and AS organic inhibitors, it is more complicated and not yet fully clear so far.…”

Section: Resultsmentioning

confidence: 99%

Corrosion protection properties of different inhibitors containing PEO/LDHs composite coating on magnesium alloy AZ31

Zhang

Jiang

et al. 2021

Sci Rep

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Corrosion inhibitors 2,5-pyridinedicarboxilate (PDC), sodium metavanadate (SMV) and 5-aminosalicylate (AS) were impregnated into porous PEO coatings respectively via vacuuming process, followed by fast sealing treatment in a Ce containing solution. After that layered double hydroxides (LDHs) based nanocontainers were respectively prepared on them via hydrothermal treatment. In frame of this work it was shown, that sealing effect for the pore was provided by formation of new phase CeO2 on the surface of PEO coatings. And, hydrothermal preparation for preparing LDHs leaded obvious changes in structure and thickness of the coatings. In addition, impregnation of inhibitors was in favor of improving LDHs content in final composite coatings. EIS result indicated that AS/Ce-HT specimen exhibited a best corrosion protection.

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Complex formation of iron(III) with diglycolic and iminodiacetic acids

Cited by 21 publications

References 24 publications

Aquation reaction of iminodiacetate complex of oxidovanadium(IV) with 2,2’-bipyridine induced by Fe(III) ions: Kinetic studies

Aquation reaction of iminodiacetate complex of oxidovanadium(IV) with 2,2’-bipyridine induced by Fe(III) ions: Kinetic studies

Extraction of uranium from non-saline and hypersaline conditions using iminodiacetic acid chelating resin Purolite S930+

Corrosion protection properties of different inhibitors containing PEO/LDHs composite coating on magnesium alloy AZ31

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