Destruction rate of volatile organochlorine compounds in water by ozonation with ultraviolet radiation

Kusakabe, Katsuki; Aso, S.; Wada, Tohru; Hayashi, Jun Ichiro; Morooka, Shigeharu; Isomura, Kazuaki

doi:10.1016/0043-1354(91)90058-x

Cited by 28 publications

(6 citation statements)

References 13 publications

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“…The efficiency of ozonation and other advanced oxidation processes in degradation of recalcitrant organic compounds of both natural and anthropogenic origin has been extensively documented ( Benoit‐Guyod et al, 1986 ; Dillert and Bahnemann, 1992 ; Glaze and Kang, 1988 ; Gurol and Vatistas, 1987 ; Herrmann et al, 1993 ; Kusakabe et al, 1991 ; Legrini et al, 1993 ; Linsebigler et al, 1995 ; Peyton et al, 1982 ; Prengle, 1983 ). For complex wastewaters containing some recalcitrant organic matter, biological pretreatment is often the most cost‐effective means of removing easily oxidizable organic compounds before ozonation.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Distillery Spent‐Wash by Ozonation and Biodegradation: Significance of pH Reduction and Inorganic Carbon Removal Before Ozonation

Kumar

Saroj²,

Tare³

et al. 2006

Water Environment Research

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This study is aimed at exploring strategies for mineralization of refractory compounds in distillery effluent by anaerobic biodegradation/ozonation/aerobic biodegradation. Treatment of distillery spent-wash used in this research by anaerobic-aerobic biodegradation resulted in overall COD removal of 70.8%. Ozonation of the anaerobically treated distillery spent-wash was carried out as-is (phase I experiments) and after pH reduction and removal of inorganic carbon (phase II experiments). Introduction of the ozonation step resulted in an increase in overall chemical oxygen demand (COD) removal, with the highest COD removals of greater than 95% obtained when an ozone dose of approximately 5.3 mg ozone absorbed/mg initial total organic carbon was used. The COD removal during phase II experiments was slightly superior compared with phase I experiments at similar ozone doses. Moreover, efficiency of ozone absorption from the gas phase into distillery spent-wash aliquots was considerably enhanced during phase II experiments. Water Environ. Res., 78, 994 (2006).

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Section: Introductionmentioning

confidence: 99%

Treatment of Distillery Spent‐Wash by Ozonation and Biodegradation: Significance of pH Reduction and Inorganic Carbon Removal Before Ozonation

Kumar

Saroj²,

Tare³

et al. 2006

Water Environment Research

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“…This is a potential advantage of oxidation compared with other treatment methods, which simply transfer the pollutants from the aqueous phase to another phase. Advanced oxidation processes involve the generation of highly reactive free radicals, especially the hydroxyl radicals (OH • ), to oxidize the organics in aqueous solution and are several orders of magnitude faster than oxidation by ozone (O 3 ) or hydrogen peroxide (H 2 O 2 ) molecules (Beltran et al, 1999;Hayashi et al, 1993;Helz et al, 1994;Kusakabe et al, 1991). Formation of hydroxyl radicals by the decomposition of hydrogen peroxide can be initiated by UV light irradiation and ozone.…”

Section: Introductionmentioning

confidence: 99%

The Effect of pH on the Decomposition of Hydrophenols in Aqueous Solutions by Ultraviolet Direct Photolysis and the Ultraviolet–Hydrogen Peroxide Process

Shen¹,

Lin²

2003

Water Environment Research

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The decomposition of catechol (o-hydrophenol) and resorcinol (m-hydrophenol) in aqueous solution by 254-nm UV direct photolysis and the UV-hydrogen peroxide (H 2 O 2 ) process under various solution pH values was studied. The light absorbance and photolytic properties of catechol and resorcinol were found to be highly dependent on solution pH and can be adequately described with a three-species distribution model. For the UV-H 2 O 2 process, the individual contribution to the decomposition of pollutants by direct photolysis and indirect hydroxyl radical destruction was differentiated by studying the linear addition of UV light absorbance of various reactant species. The contribution to the decomposition of the two hydrophenols by hydroxyl radical destruction was more than 95% in acidic and neutral solutions for treatment with the UV-H 2 O 2 process. Water Environ. Res., 75, 54 (2003).

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“…those involving the use of non-advanced oxidants such as permanganate), owing to their potency to render partial and complete destruction of many refractory compounds. Such refractory compounds include dyestuffs and halogenated and aromatic organics (Bauman and Stenstrom, 1990;Kusakabe et al, 1991;Ince et al, 1997;Ince and Tezcanli, 1999). Typical aromatic compounds include benzene, C6H6, and…”

Section: )mentioning

confidence: 99%

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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Destruction rate of volatile organochlorine compounds in water by ozonation with ultraviolet radiation

Cited by 28 publications

References 13 publications

Treatment of Distillery Spent‐Wash by Ozonation and Biodegradation: Significance of pH Reduction and Inorganic Carbon Removal Before Ozonation

Treatment of Distillery Spent‐Wash by Ozonation and Biodegradation: Significance of pH Reduction and Inorganic Carbon Removal Before Ozonation

The Effect of pH on the Decomposition of Hydrophenols in Aqueous Solutions by Ultraviolet Direct Photolysis and the Ultraviolet–Hydrogen Peroxide Process

Remediation of Spent Oxalic Acid Nuclear Decontamination Solutions Using Ozone

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