Malonic acid: A potential reagent in decontamination processes for Ni-rich alloy surfaces

García, Daniela B.; Bruyère, Vivianne I. E.; Bordoni, R.; Olmedo, A.M.; Morando, Pedro J.

doi:10.1016/j.jnucmat.2011.02.022

Cited by 7 publications

(3 citation statements)

References 25 publications

(56 reference statements)

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“…also participate in oxides and contribute greatly to increasing the dose rate in circuit [4][5][6]. Chemical decontamination is an effective method to reduce occupational radiation exposure during large-scale maintenance tasks such as the overhaul of primary recirculation pumps and shroud replacement in in-service nuclear power plants (NPPs) [7]. Therefore, many different chemical decontamination methods have been developed [8][9][10][11][12][13][14][15], such as HP/CORD (Chemical Oxidation Reduction Decontamination), AP/CITROX (Citric plus Oxalic acids), and LOMI (Low Oxidation state Metal Ion).…”

Section: Introductionmentioning

confidence: 99%

Effect of Oxidizing Decontamination Process on Corrosion Property of 304L Stainless Steel

Tian

Song

2019

International Journal of Corrosion

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Corrosion behaviors of 304L stainless steel (SS) and 304L SS with oxides film (preoxidation 304L SS) in 1 g/L potassium permanganate solution of various pH values were investigated by using mass loss, electrochemical measurement and scanning electron microscope (SEM) observation. The results showed that mass loss of 304L SS increases with the increase of sodium hydroxide or nitric acid concentration in 1 g/L potassium permanganate solution. The polarization curves of 304L SS in potassium permanganate solution show that passive zones are destroyed more easily in acid potassium permanganate solution than alkaline potassium permanganate solution. The corrosion ability of acid potassium permanganate (NP) decontamination solution used for 304L SS is more aggressive than alkaline potassium permanganate (AP) solution. The oxide film on the surface of preoxidation 304L SS can be removed completely in two oxidation reduction decontamination cycles, oxidizing solution of which comprised 0.4g/L sodium hydroxide and 1g/L potassium permanganate. The 304L SS and preoxidation 304L SS performed alkaline oxidation reduction decontamination of 3 cycles were reoxidation. The micromorphology of reoxidation specimens was similar to preoxidation 304L SS. Therefore the chemical decontamination of alkaline oxidizing and acid reducing steps had no negative effect on corrosion of 304L SS and reoxidation of 304L SS carried out decontamination.

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Section: Introductionmentioning

confidence: 99%

Effect of Oxidizing Decontamination Process on Corrosion Property of 304L Stainless Steel

Tian

Song

2019

International Journal of Corrosion

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“…It is also used as a potential reagent in decontamination for Ni-rich alloy surfaces, chelating agent, and indicator for orange fruit senescence. 5,6 Malonic acid was first produced by oxidation of malic acid which was extracted from the rhubarb plant by the French chemist Victor Dessaignes in 1858. It occurs naturally in the pigment of fruits and flowers.…”

Section: Introductionmentioning

confidence: 99%

“…Eastman Kodak Co. had used malonic acid and its derived compounds as a surgical adhesive. It is also used as a potential reagent in decontamination for Ni-rich alloy surfaces, chelating agent, and indicator for orange fruit senescence. , Malonic acid was first produced by oxidation of malic acid which was extracted from the rhubarb plant by the French chemist Victor Dessaignes in 1858. It occurs naturally in the pigment of fruits and flowers. , Malonic acid produced from the chloroacetic acid route using sodium cyanide and sodium carbonate has a disadvantage because of the cyanide group associated with the process.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Reactive Extraction of Malonic Acid with Validation by Fourier Transform Infrared Spectroscopy

Dhongde

Wasewar

2019

J. Chem. Eng. Data

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Malonic acid is an essential carboxylic acid that is used as a backbone reactant in deriving multiple higher-order carboxylic compounds. The successful attempt of producing malonic acid from a biological route has attracted the scientific community to extract malonic acid from a fermentation broth or dilute aqueous stream. Experimental study on the recovery of malonic acid by reactive extraction was performed, and the effects of TBP concentration, diluents (alkane, ketone, and alcohol), and malonic acid concentration were investigated. The equilibrium models (relative basicity and mass action law models) and the number of theoretical units (NTU) were also evaluated. Fourier transform infrared spectroscopy provided evidence for the formation of significant bonds among extractant–diluent–acid complexation systems which support the experimental outcomes. The results of extraction equilibrium are discussed regarding dimerization constant (D MA), partition coefficient (P MA), extraction efficiency (E MA%), distribution coefficient (K D(MA)), overall extraction complexation equilibrium (K E(MA)), and loading factor (Z MA). The highest reactive extraction efficiency was 73.5% with 0.5962 mol·kg–1 TBP used in MIBK. The distribution coefficient (K D(MA)) of malonic acid in various diluents exhibited the trend MIBK > octanol > heptane. The comparison between values predicted by the equilibrium model and experimental outcomes shows that the relative basicity models predicted better results than the mass action law for reactive extraction of malonic acid. The NTU was calculated to be 2, which was estimated by the modified Kremser equation for designing a countercurrent reactive extraction column.

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Applications of Ionic Liquids in Removal of Surface Contaminants

Kohli

2019

Developments in Surface Contamination and Cleaning: Applications of Cleaning Techniques

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Malonic acid: A potential reagent in decontamination processes for Ni-rich alloy surfaces

Cited by 7 publications

References 25 publications

Effect of Oxidizing Decontamination Process on Corrosion Property of 304L Stainless Steel

Effect of Oxidizing Decontamination Process on Corrosion Property of 304L Stainless Steel

Experimental Study on Reactive Extraction of Malonic Acid with Validation by Fourier Transform Infrared Spectroscopy

Applications of Ionic Liquids in Removal of Surface Contaminants

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