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Surface Decontamination by Photocatalysis

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Surface Decontamination by Photocatalysis. / Boxall, Colin; Wilbraham, Richard; Taylor, Robin J.; Woodbury, Simon.

In: MRS Online Proceedings Library, Vol. 1383, mrsf11-1383-a07-07, 2012.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Boxall, C, Wilbraham, R, Taylor, RJ & Woodbury, S 2012, 'Surface Decontamination by Photocatalysis', MRS Online Proceedings Library, vol. 1383, mrsf11-1383-a07-07. https://doi.org/10.1557/opl.2012.182

APA

Boxall, C., Wilbraham, R., Taylor, R. J., & Woodbury, S. (2012). Surface Decontamination by Photocatalysis. MRS Online Proceedings Library, 1383, [mrsf11-1383-a07-07]. https://doi.org/10.1557/opl.2012.182

Vancouver

Boxall C, Wilbraham R, Taylor RJ, Woodbury S. Surface Decontamination by Photocatalysis. MRS Online Proceedings Library. 2012;1383. mrsf11-1383-a07-07. https://doi.org/10.1557/opl.2012.182

Author

Boxall, Colin ; Wilbraham, Richard ; Taylor, Robin J. ; Woodbury, Simon. / Surface Decontamination by Photocatalysis. In: MRS Online Proceedings Library. 2012 ; Vol. 1383.

Bibtex

@article{8fd24863f1af4f5ea02ea23d7247382b,
title = "Surface Decontamination by Photocatalysis",
abstract = "Currently in the nuclear industry, surface contamination in the form of radioactive metal or metal oxide deposits is most commonly removed by chemical decontamination, electrochemical decontamination or physical attrition. Physical attrition techniques are generally used on structural materials (concrete, plaster), with (electro)chemical methods being used to decontaminate metallic or painted surfaces. The most common types of (electro)chemical decontamination are the use of simple mineral acids such as nitric acid or cerium (IV) oxidation (MEDOC). Use of both of these reagents frequently results in the dissolution of a layer of the substrate surface increasing the percentage of secondary waste which leads to burdens on downstream effluent treatment and waste management plants. In this context, both mineral acids and MEDOC can be indiscriminate in the surfaces attacked during deployment, e.g. attacking in transit through a pipe system to the site of contamination resulting in both diminished effect of the decontaminating reagent upon arrival at its target site and an increased secondary waste management requirement. This provides two main requirements for a more ideal decontamination reagent: Improved area specificity and a dissolution power equal to or greater than the previously mentioned current decontaminants. Photochemically promoted processes may provide such a decontamination technique. Photochemical reduction of metal ion valence states to aid in heavy metal deposition has already been extensively studied, with reductive manipulation also being achieved with uranium and plutonium simulants (Ce). Importantly photooxidation of a variety of solution phase metals, including neptunium, has also been achieved. Here we briefly review existing decontamination techniques and report on the potential application of photo promoted oxidation technologies to metal dissolution (including process steels) and to the dissolution of adsorbed actinide contaminants. ",
keywords = "nuclear, decontamination, uranium, studtite, photocatalysis",
author = "Colin Boxall and Richard Wilbraham and Taylor, {Robin J.} and Simon Woodbury",
year = "2012",
doi = "10.1557/opl.2012.182",
language = "English",
volume = "1383",
journal = "MRS Online Proceedings Library",
issn = "0272-9172",
publisher = "Materials Research Society",

}

RIS

TY - JOUR

T1 - Surface Decontamination by Photocatalysis

AU - Boxall, Colin

AU - Wilbraham, Richard

AU - Taylor, Robin J.

AU - Woodbury, Simon

PY - 2012

Y1 - 2012

N2 - Currently in the nuclear industry, surface contamination in the form of radioactive metal or metal oxide deposits is most commonly removed by chemical decontamination, electrochemical decontamination or physical attrition. Physical attrition techniques are generally used on structural materials (concrete, plaster), with (electro)chemical methods being used to decontaminate metallic or painted surfaces. The most common types of (electro)chemical decontamination are the use of simple mineral acids such as nitric acid or cerium (IV) oxidation (MEDOC). Use of both of these reagents frequently results in the dissolution of a layer of the substrate surface increasing the percentage of secondary waste which leads to burdens on downstream effluent treatment and waste management plants. In this context, both mineral acids and MEDOC can be indiscriminate in the surfaces attacked during deployment, e.g. attacking in transit through a pipe system to the site of contamination resulting in both diminished effect of the decontaminating reagent upon arrival at its target site and an increased secondary waste management requirement. This provides two main requirements for a more ideal decontamination reagent: Improved area specificity and a dissolution power equal to or greater than the previously mentioned current decontaminants. Photochemically promoted processes may provide such a decontamination technique. Photochemical reduction of metal ion valence states to aid in heavy metal deposition has already been extensively studied, with reductive manipulation also being achieved with uranium and plutonium simulants (Ce). Importantly photooxidation of a variety of solution phase metals, including neptunium, has also been achieved. Here we briefly review existing decontamination techniques and report on the potential application of photo promoted oxidation technologies to metal dissolution (including process steels) and to the dissolution of adsorbed actinide contaminants.

AB - Currently in the nuclear industry, surface contamination in the form of radioactive metal or metal oxide deposits is most commonly removed by chemical decontamination, electrochemical decontamination or physical attrition. Physical attrition techniques are generally used on structural materials (concrete, plaster), with (electro)chemical methods being used to decontaminate metallic or painted surfaces. The most common types of (electro)chemical decontamination are the use of simple mineral acids such as nitric acid or cerium (IV) oxidation (MEDOC). Use of both of these reagents frequently results in the dissolution of a layer of the substrate surface increasing the percentage of secondary waste which leads to burdens on downstream effluent treatment and waste management plants. In this context, both mineral acids and MEDOC can be indiscriminate in the surfaces attacked during deployment, e.g. attacking in transit through a pipe system to the site of contamination resulting in both diminished effect of the decontaminating reagent upon arrival at its target site and an increased secondary waste management requirement. This provides two main requirements for a more ideal decontamination reagent: Improved area specificity and a dissolution power equal to or greater than the previously mentioned current decontaminants. Photochemically promoted processes may provide such a decontamination technique. Photochemical reduction of metal ion valence states to aid in heavy metal deposition has already been extensively studied, with reductive manipulation also being achieved with uranium and plutonium simulants (Ce). Importantly photooxidation of a variety of solution phase metals, including neptunium, has also been achieved. Here we briefly review existing decontamination techniques and report on the potential application of photo promoted oxidation technologies to metal dissolution (including process steels) and to the dissolution of adsorbed actinide contaminants.

KW - nuclear

KW - decontamination

KW - uranium

KW - studtite

KW - photocatalysis

U2 - 10.1557/opl.2012.182

DO - 10.1557/opl.2012.182

M3 - Journal article

VL - 1383

JO - MRS Online Proceedings Library

JF - MRS Online Proceedings Library

SN - 0272-9172

M1 - mrsf11-1383-a07-07

ER -