Studies on decomposition behavior of oxalic acid waste by UVC photo-Fenton advanced oxidation process

Kim, Jinhee; Lee, Hyun Kyu; Park, Yoon-Ji; Lee, Sae-Binna; Choi, Sang-June; Oh, Won Zin; Kim, Hak‐Soo; Kim, Cho-Rong; Kim, Ki-Chul; Seo, Bum-Chul

doi:10.1016/j.net.2019.06.011

Cited by 10 publications

(9 citation statements)

References 15 publications

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“…As there was no sampling carried out between 6 and 24 h, the rate of degradation during this period is not precisely determined. Therefore, it is possible that the degradation stopped before 24 h. These results were in accordance with the work published by Mailen et al and Kim et al, who found the oxalic destruction rate increases with increasing concentration of hydrogen peroxide (Mailen et al, 1981;Kim et al, 2019). Kim et al noticed a significant reduction in oxalic acid concentrations with a ratio of 1:2 in oxalic acid:hydrogen peroxide (O:H), albeit with the use of UV.…”

Section: Effects Of Different Concentrations Of Hydrogen Peroxidesupporting

confidence: 89%

“…Fenton's reagent is a rapid and exothermic method of oxidizing organic compounds. It results in the oxidation of contaminants to primarily carbon dioxide and water (Kim et al, 2019;Cai et al, 2021). The reactions are accelerated in the presence of UV, therefore known as UV photo-Fenton reaction (Oturan and Aaron, 2014;Kim et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…It results in the oxidation of contaminants to primarily carbon dioxide and water (Kim et al, 2019;Cai et al, 2021). The reactions are accelerated in the presence of UV, therefore known as UV photo-Fenton reaction (Oturan and Aaron, 2014;Kim et al, 2019). The important radical formation steps are seen in Eqs 6, 7 while the radical termination is seen in Eqs 8, 9.…”

Section: Introductionmentioning

confidence: 99%

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Methods for the destruction of oxalic acid decontamination effluents

Blenkinsop,

Rivonkar,

Robin

et al. 2024

Front. Nucl. Eng.

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Oxalic acid is encountered within industrial processes, spanning from the nuclear sector to various chemical applications. The persistence and potential environmental risks associated with this compound underscore the need for effective management strategies. This article presents an overview of different approaches for the destruction of oxalic acid. The study explores an array of degradation methodologies and delves into the mechanistic insights of these techniques. Significant attention is channeled towards the nuclear industry, wherein oxalic acid arises as a byproduct of decontamination and waste management activities. An integral aspect of decommissioning efforts involves addressing this secondary waste-form of oxalic acid. This becomes imperative due to the potential release of oxalic acid into waste streams, where its accommodation is problematic, and its capacity to solubilize and transport heavy metals like Pu is a concern. To address this, a two-tiered classification is introduced: high concentration and low concentration scenarios. The study investigates various parameters, including the addition of nitric acid or hydrogen peroxide, in the presence of metallic ions, notably Mn2+ and Fe2+. These metallic ions are common components of effluents from metallic waste treatment. Additionally, the impact of UV light on degradation is explored. Investigations reveal that at high concentrations and with the influence of hydrogen peroxide, the presence of metallic cations accelerates the rate of destruction, demonstrating a direct correlation. This acceleration is further enhanced by exposure to UV light. At low concentrations, similar effects of metallic cations are observed upon heating the solution to 80°C. The rate of destruction increases proportionally with hydrogen peroxide concentration, with an optimal oxalic acid to hydrogen peroxide ratio of 1:100. Interestingly, a low-power UV light exerted no discernible effects on the destruction rate; heating alone proved sufficient. In essence, regardless of concentration, the degradation of oxalic acid with hydrogen peroxide experiences acceleration in the presence of metallic ions such as Mn2+ and Fe2+.

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Section: Effects Of Different Concentrations Of Hydrogen Peroxidesupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Methods for the destruction of oxalic acid decontamination effluents

Blenkinsop,

Rivonkar,

Robin

et al. 2024

Front. Nucl. Eng.

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“…To evaluate the effect of radiation on HCQ degradation, two radiation sources were used, UV-A lamps that emit long wave radiation in the range from 315 to 400 nm and natural solar radiation with an emission spectrum divided into high energy ultraviolet (5%), visible and infrared light with photothermal effect (Kim et al 2019). Figure 6 shows the degradation profile of the compound under natural solar irradiation and UV-A (C/C 0 ) by the exposure time (min) without the presence of the catalyst (photolysis) and with the catalyst 15%ZnOCP at a concentration of 2 g L À1 .…”

Section: Radiation Effectmentioning

confidence: 99%

Photocatalytic degradation of hydroxychloroquine using ZnO supported on clinoptilolite zeolite

Silva

Nippes

Macruz

et al. 2021

Water Science and Technology

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The objective of this work was to evaluate the photocatalytic activity of zinc oxide catalysts supported on natural zeolite clinoptilolite for photocatalytic degradation of the drug hydroxychloroquine, used in the treatment of malaria and which has been tested in the treatment of COVID-19. To synthesize 10%ZnOCP and 15%ZnOCP catalysts, the wet impregnation methodology was used. The raw and synthesized catalysts were characterized by XRD, SEM, XRF, BET, DRS, PCZ, FT-IR and PL. The degradation of hydroxychloroquine was calculated using UV-vis absorption from the samples before and after the photocatalytic process. The maximum percentage of degradation (96%) was obtained with the operational parameters of C0 = 10 mg L−1; Ccat = 2 g L−1 of 15%ZnOCP; pH = 7.5; UV-A radiation. Ecotoxicological tests against the bioindicators Lactuca sativa and Artemia salina confirmed the reduction of effluent toxicity after treatment.

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“…The anodic Fenton treatment (AFT) is based on the production of an oxidizing species, the hydroxyl radicals (•OH). These radicals are generated from different pathways through AOPs, such as UV/H 2 O 2 [6,7], ozonation [8,9], electro-Fenton (EF) [10,11], and photo-Fenton [12,13]. In Fenton reaction, the radicals (•OH) are generated from the catalysis of the ions of a transition metal, such as Fe 2+ , with H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

Technical–Economic Analysis of Hydrogen Peroxide Activation by a Sacrificial Anode: Comparison of Two Exchange Membranes

et al. 2021

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Divided electrochemical reactors allow the design of strategies to take advantage of the two reactions of the redox pair involved for wastewater treatment. Nafion membranes are the most used separators in these cells. These membranes have demonstrated high efficiency, but their high costs make the process more expensive. The present work focuses on the evaluation of the technical and economic feasibility of replacing the Nafion 117® membrane with a commercial polymeric membrane used in reverse osmosis (RO) treatments. In this study, a divided electrochemical cell was constructed with electrodes made of galvanized steel. The Fenton reaction was developed in the anode compartment using electrogenerated iron as a catalyst. An experimental design 2 3 was used to study the influence of three operating parameters (initial H 2 O 2 , membrane, voltage) on the H 2 O 2 activation kinetics. The results demonstrated that the activation of H 2 O 2 followed a pseudo-zero-order kinetic. The maximum rate constants obtained for Nafion 117® and RO membrane were 2.76 mM min −1 and 2.45 mM min −1 , respectively. The optimization of H 2 O 2 activation process was performed using a response surface methodology, where multiple regression models were used to figure out the best operation conditions when using both membranes. Finally, an extensive cost analysis of the process is included.

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Studies on decomposition behavior of oxalic acid waste by UVC photo-Fenton advanced oxidation process

Cited by 10 publications

References 15 publications

Methods for the destruction of oxalic acid decontamination effluents

Methods for the destruction of oxalic acid decontamination effluents

Photocatalytic degradation of hydroxychloroquine using ZnO supported on clinoptilolite zeolite

Technical–Economic Analysis of Hydrogen Peroxide Activation by a Sacrificial Anode: Comparison of Two Exchange Membranes

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