Oxidative decomposition of oxalate ions in water solutions of concentrated ozone

Lagunova, Yu. O.; Селиверстов, А. Ф.; Ершов, Б. Г.; Basiev, A. G.

doi:10.1007/s10512-012-9603-9

Cited by 7 publications

(10 citation statements)

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“…In addition, as discussed in Section 3.4.1.4, due to the need for initiation by hydroxide ions, decomposition of ozone to form hydroxyl radicals occurs extremely slow at low pH values, something that was recently revisited and confirmed by Lagunova et al (Lagunova et al, 2012). Indeed, Beltrán et al, 2003a and2003b, have reported that ozone barely reacts with oxalate in acidic solution either directly or indirectly.…”

Section: Non-radical Pathwaysmentioning

confidence: 98%

“…As summarised in Section 3.3, two possible substrate oxidation routes can occur in an ozonation process (Von Gunten, 2003;Ledakowicz et al, 2001;Chiang et al, 2006;Hoigné and Bader, 1977;Arslan et al, 1999;Baig and Liechti, 2001;Li et al, 2010): 1) Directly, reacting with ozone (Lagunova et al, 2012), especially under non-acidic conditions (Tomiyasu et al, 1985),…”

Section: Direct and Indirect Ozonationmentioning

confidence: 99%

“…in the absence of metal catalysts) ozone sparging has been widely studied. Of particular relevance to this work is a recent paper by Lagunova et al, (Lagunova et al, 2012) that investigates the pH and temperature dependence of the processidentifying optimum conditions for oxalate destruction as a pH of 10 and a temperature of 50 to 60 o C.…”

Section: Homogeneous Catalytic Ozonationmentioning

confidence: 99%

“…For oxalate decomposition, the scavenging effect of hydroxyl radicals by carbonate and bicarbonate can be significant. The potential significance is because carbon dioxide and water are the primary products associated with the oxidative mineralisation of oxalate (Davis et al, 2009;Zuo and Deng, 1997;Lagunova et al, 2012;Minakata et at., 2011). Per Munter, 2001, CO2 readily dissolves in water, a process that becomes more favourable as pH increases with bicarbonate formation dominating at pH > 6.4 and carbonate formation predominating at pH > 10.3.…”

Section: Carbonate and Bicarbonatementioning

confidence: 99%

“…Carbon dioxide is the primary product of the oxidative mineralisation of oxalate (Davis et al, 2009;Zuo and Deng, 1997;Lagunova et al, 2012;Minakata et al, 2011). Carbon dioxide readily dissolves in water, a process that becomes more favourable as pH increases with bicarbonate formation predominating at pH > 6.4 and carbonate formation predominating at pH > 10.3.…”

Section: Carbonate/bicarbonatementioning

confidence: 99%

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Remediation of Spent Oxalic Acid Nuclear Decontamination Solutions Using Ozone

Ketusky

2018

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The Savannah River Site (SRS) has forty-three remaining very large underground tanks containing significant quantities of nuclear waste generated primarily from cold-war radiochemical separations. All of the tanks eventually must be closed. As part of decommissioning/closing the nuclear waste tanks, even residual quantities of the waste must be removed. Although most sludge can be removed mechanically, chemically cleaning (i.e. decontamination) with oxalic acid is used to aid in the removal of residual quantities. Although oxalic acid works for cleaning the tanks, its downstream impacts are considered detrimental. To better understand and quantify the impacts, detailed models were developed to account for different potential processing strategies for handling the spent oxalic acid nuclear decontamination slurries. Although the results vary, the models show that regardless of the oxalate handling strategies: 1) significant washing to decrease sodium concentration/solids concentration in vitrification feed will be required, and 2) the creation of copious future additions of feed for salt processing will be unavoidable. Using a Theory of Inventive Problem Solving (TRIZ) approach, a modified form of the Chemical Oxidation Reduction Decontamination (CORD) ultraviolet (UV) light was identified as being used with an analogous but already resolved problem that could be adapted to SRS HLW tank cleaning. A novel preliminary process called Enhanced Chemical Cleaning (ECC) was envisioned. Many people have aided me in this research and made this thesis possible. Naming all key people would likely be impossible; therefore, I will probably leave someone out. In advance, please accept my apologies. From my time at High-Level Waste Engineering, I would like to thank Renee Spires, Tommy Caldwell, Mark Mahoney, and Neil Davis. They were the first people to honestly trust my novel TRIZ determination that using oxalic acid to clean the High-Level Waste tanks, tied closely to decomposing the resultant spent acid solution represented the "ideal solution." At Savannah River National Laboratory, Chris Martino and Bill King, who spent considerable time helping me understand much of the oxidation chemistry. At AREVA NP (Lynchburg) Dennis Jones, John Remark, Ray Beatty, and Sarah Evans, all who helped me gain valuable insights. My supervisor Professor Colin Boxall who encouraged me throughout the process. And finally, to my many friends and colleagues that supported me during this research. viii

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Section: Non-radical Pathwaysmentioning

confidence: 98%

Section: Direct and Indirect Ozonationmentioning

confidence: 99%

Section: Homogeneous Catalytic Ozonationmentioning

confidence: 99%

Section: Carbonate and Bicarbonatementioning

confidence: 99%

Section: Carbonate/bicarbonatementioning

confidence: 99%

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Remediation of Spent Oxalic Acid Nuclear Decontamination Solutions Using Ozone

Ketusky

2018

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Evaluation and comparison of advanced oxidation processes for the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D): a review

Girón-Navarro

Linares-Hernández

Teutli-Sequeira

et al. 2021

Environ Sci Pollut Res

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Abatement of amoxicillin and doxycycline in binary and ternary aqueous solutions by gas-phase pulsed corona discharge oxidation

Соколов

Kråkström

Eklund

et al. 2018

Chemical Engineering Journal

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The presence of pharmaceutical compound residues in water bodies is becoming an increasingly serious problem. Various pharmaceuticals have been detected in raw municipal wastewaters, after wastewater treatment plant processes, and even in drinking water. Many common pharmaceuticals are bio-accumulating and they can have a harmful impact on aquatic and terrestrial organisms. In this work, pulsed corona discharge technology (PCD) is studied as a potential method for antibiotic compounds abatement. Two antibiotics, amoxicillin and doxycycline, were chosen as test pharmaceutical compounds. The aim of the study was to investigate the transformation kinetics of binary solutions (watersingle antibiotic compound) and ternary solutions (water-two antibiotic compounds) of the compounds and to optimize operational parameters for improved oxidation performance. Ternary solutions were investigated to obtain data on transformation kinetics when two competing pharmaceutical molecules are present in the solution. The experiments showed that reactions of doxycycline oxidation are always first order reactions. Reaction of amoxicillin oxidation has second order in the case of experiments with binary solution in alkaline medium. In other cases, it has first order. The transformation products formed were identified and monitored based on liquid chromatography mass spectrometer analysis. OH-amoxicillin, amoxicillin pencilloic acid, OH-doxycycline and 2-OH-doxycycline had the largest peaks areas. All studied compounds and all transformation products can be easily oxidized by PCD. Approximately 1 kWh/m 3 and 0.5 kWh/m 3 delivered energy is enough for oxidation of great part of amoxicillin and doxycycline respectively. Low frequency, 50 pps, and high (pH=12) are preferable for oxidation of both antibiotics from the energy consumption point of view.

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Oxidative decomposition of oxalate ions in water solutions of concentrated ozone

Cited by 7 publications

References 1 publication

Remediation of Spent Oxalic Acid Nuclear Decontamination Solutions Using Ozone

Remediation of Spent Oxalic Acid Nuclear Decontamination Solutions Using Ozone

Evaluation and comparison of advanced oxidation processes for the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D): a review

Abatement of amoxicillin and doxycycline in binary and ternary aqueous solutions by gas-phase pulsed corona discharge oxidation

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