The applications of formo- and aceto-hydroxamic acids in nuclear fuel reprocessing

Taylor, Raymond L.; May, Iain; Wallwork, A. L.; Denniss, Iain S.; Hill, N. J.; Galkin, B. Ya.; Zilberman, B. Ya.; Fedorov, Yu. S.

doi:10.1016/s0925-8388(98)00146-7

Cited by 99 publications

(67 citation statements)

References 10 publications

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“…Siderophores and other naturally occurring ligands may therefore affect actinide mobility in waste repositories and the environment and may also be used to treat radioactive waste prior to storage or to decontaminate soils and waters (15,24,42,56). Siderophores and siderophore analogues have also been investigated for possible medical use in the decorporation of actinides from the body (25,48,49), while simple hydroxamates may have uses in the reprocessing of nuclear fuel (31,32,51,52).…”

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confidence: 99%

Development and Application of an Assay for Uranyl Complexation by Fungal Metabolites, Including Siderophores

Renshaw¹,

Halliday

Robson

et al. 2003

Appl Environ Microbiol

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An assay to detect UO 2 2؉ complexation was developed based on the chrome azurol S (CAS) assay for siderophores (B. Schwyn and J. B. Neilands, Anal. Biochem. 160:47-56, 1987) and was used to investigate the ability of fungal metabolites to complex actinides. In this assay the discoloration of two dyed agars (one containing a CAS-Fe 3؉ dye and the other containing a CAS-UO 2 2؉ dye) caused by ligands was quantified. The assay was tested by using the siderophore desferrioxamine B (DFO), and the results showed that there was a regular, reproducible relationship between discoloration and the amount of siderophore added. The ratio of the discoloration on the CAS-UO 2 2؉ agar to the discoloration on the CAS-Fe 3؉ agar was independent of the amount of siderophore added. A total of 113 fungi and yeasts were isolated from three soil samples taken from the Peak District National Park. The fungi were screened for the production of UO 2 2؉ chelators by using the CAS-based assay and were also tested specifically for hydroxamate siderophore production by using the hydroxamate siderophore auxotroph Aureobacterium flavescens JG-9. This organism is highly sensitive to the presence of hydroxamate siderophores. However, the CAS-based assay was found to be less sensitive than the A. flavescens JG-9 assay. No significant difference between the results for each site for the two tests was found. Three isolates were selected for further study and were identified as two Pencillium species and a Mucor species. Our results show that the new assay can be effectively used to screen fungi for the production of UO 2 2؉ chelating ligands. We suggest that hydroxamate siderophores can be produced by mucoraceous fungi.

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Development and Application of an Assay for Uranyl Complexation by Fungal Metabolites, Including Siderophores

Renshaw¹,

Halliday

Robson

et al. 2003

Appl Environ Microbiol

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“…As part of an Advanced PUREX process (Adv-PUREX), the use of acetohydroxamic acid (AHA) has been proposed as a means to hold back Pu and Np in the aqueous phase, thus allowing U(VI) to be extracted into the TBP without Pu/Np contamination [2][3][4][5][6]. This has led to the development of a variety of advanced fuel cycle concepts that incorporate AHA, such as URanium EXtraction Plus (UREX+) [7,8] and Grouped ActiNide Extraction (GANEX) [9,10], which do not extract pure plutonium but rather a mix of Pu, Am and Np, providing a non-proliferation advantage over the traditional PUREX process [11].…”

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confidence: 99%

The effect of acetohydroxamic acid on stainless steel corrosion in nitric acid

Wilbraham

Boxall

2016

Electrochemistry Communications

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We present the first study of the effect of acetohydroxamic acid (AHA) on the corrosion behaviour of stainless steels. Particularly, studies have been performed using steels and physicochemical conditions equivalent to those proposed for use in advanced nuclear reprocessing platforms. In these, AHA has been shown to have little effect on either steel passivation or reductive dissolution of both SS304L and SS316L. However, under transpassive dissolution conditions, AHA while in part electrochemically oxidised to acetic acid and nitroxyl/hydroxylamine, also complexes with Fe 3+ , inhibiting secondary passivation and driving transpassive dissolution of both steels.

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“…From head end to product fi nishing this fl ow sheet is broadly similar to the Plutonium Uranium Redox EXtraction (PUREX/advanced-PUREX) fl ow sheet [3][4][5][6][7], which is currently employed at the Thermal Oxide Reprocessing Plant (THORP) in the UK for the reprocessing of spent nuclear fuel. However, there are two key differences between the EURO-GANEX and PUREX process: 1) Di(2-ethyl hexyl) isobutyramide (DEHiBA) and odourless kerosene (OK) are deployed in the primary separation cycle and N,N,N′,N′-tetraoctyldiglycolamide (TODGA) and N,N′--dimethyl-N,N′-dioctylhexylethoxymalonamide (DMDOHEMA) in the 2nd cycle trans-uranium element extraction in the EURO-GANEX process to produce an impure, proliferation resistant, plutonium stream.…”

Section: Introductionmentioning

confidence: 99%

The effect of SO₃-Ph-BTBP on stainless steel corrosion in nitric acid

Wilbraham

Boxall

2015

Nukleonika

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Abstract. SO 3 -Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced reprocessing schemes such as GANEX and SANEX. We present the fi rst study of the effect of SO 3 -Ph-BTBP on the corrosion behavior of stainless steels. Specifi cally, studies have been performed using steels and conditions equivalent to those found in relevant nuclear reprocessing fl ow sheets. SO 3 -Ph-BTBP has been shown to have little effect on either steel passivation or reductive dissolution. However, if driven cathodically into a region of hydrogen evolution at the electrode surface or conversely anodically into a region of transpassive dissolution, observed currents are reduced in the presence of SO 3 -Ph-BTBP, suggesting corrosion inhibition of the steel potentially through weak absorption of a SO 3 -Ph--BTBP layer at the metal-solution interface. The lack of any observed corrosion acceleration via complexation of Fe 3+ is surprising and has been suggested to be due to the slow extraction kinetics of SO 3 -Ph-BTBP as a result of a requirement for a trans-to cis-conformational change before binding.

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The applications of formo- and aceto-hydroxamic acids in nuclear fuel reprocessing

Cited by 99 publications

References 10 publications

Development and Application of an Assay for Uranyl Complexation by Fungal Metabolites, Including Siderophores

Development and Application of an Assay for Uranyl Complexation by Fungal Metabolites, Including Siderophores

The effect of acetohydroxamic acid on stainless steel corrosion in nitric acid

The effect of SO₃-Ph-BTBP on stainless steel corrosion in nitric acid

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The applications of formo- and aceto-hydroxamic acids in nuclear fuel reprocessing

Cited by 99 publications

References 10 publications

Development and Application of an Assay for Uranyl Complexation by Fungal Metabolites, Including Siderophores

Development and Application of an Assay for Uranyl Complexation by Fungal Metabolites, Including Siderophores

The effect of acetohydroxamic acid on stainless steel corrosion in nitric acid

The effect of SO3-Ph-BTBP on stainless steel corrosion in nitric acid

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Product

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The effect of SO₃-Ph-BTBP on stainless steel corrosion in nitric acid