Oxidation of aqueous N-nitrosodiethylamine: Experimental comparison of pulsed corona discharge with H2O2-assisted ozonation

Kask, Maarja; Krichevskaya, Marina; Preis, Sergei; Bolobajev, Juri

doi:10.1016/j.jece.2021.105102

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…The oxidation energy efficiency at 80% of DXM degradation thus comprised, in the ozonation experiment, about 9.7g kW −1 h −1 , which is 2.4 times smaller than the PCD efficiency. The obtained difference between PCD and ozonation is consistent with other works of the authors [39,40].…”

Section: Identification Of Oxidation End-productssupporting

confidence: 93%

Oxidation of Aqueous Dexamethasone Solution by Gas-Phase Pulsed Corona Discharge

Onga

Kattel-Salusoo

Trapido

et al. 2022

Water

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The most widely used anti-inflammatory corticosteroid dexamethasone (DXM), frequently detected in waterbodies due to its massive consumption and incomplete removal in wastewater treatment processes, was experimentally studied for oxidation with gas-phase pulsed corona discharge (PCD) varied in pulse repetition frequency, pH, DXM initial concentration and additions of surfactant sodium dodecyl sulphate (SDS) and tert-butyl alcohol (TBA). The experimental study also included ozonation as compared to PCD in energy efficiency. The advantageous energy efficiency of PCD was observed in wide spans of pH and DXM initial concentrations surpassing ozonation by about 2.4 times. Identified transformation by- and end-products (fluoride and acetate), as well as the impact of radical scavengers, point to the prevalent radical oxidation of DXM. Somewhat increased toxicity observed on the course of PCD-treatment of high DXM concentrations presents a subject for further studies.

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Section: Identification Of Oxidation End-productssupporting

confidence: 93%

Oxidation of Aqueous Dexamethasone Solution by Gas-Phase Pulsed Corona Discharge

Onga

Kattel-Salusoo

Trapido

et al. 2022

Water

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“…These studies only report the results obtained in either the aqueous or the gaseous phase, without considering the necessity to control pollutant removal in both phases. The pulsed corona discharge used in the study has shown an energy-efficient degradation of various aqueous pollutants [16][17][18], although the volatile acetone demonstrated its refractory character [19]. Therefore, the PCD not only faces the problem of ozone (O 3 ) present in the discharge, but also of residual VOCs in the air exhaust, requiring their elimination.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the PCD not only faces the problem of ozone (O 3 ) present in the discharge, but also of residual VOCs in the air exhaust, requiring their elimination. Ozone is formed in plasma reactions together with HO-radicals (HO • ), hydrogen peroxide (H 2 O 2 ), and atomic oxygen [17,[20][21][22]. Photocatalytic oxidation successfully degrades low concentrations of airborne VOCs, converting them into harmless products, often H 2 O and CO 2 [7].…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Aqueous Toluene by Gas-Phase Pulsed Corona Discharge in Air-Water Mixtures Followed by Photocatalytic Exhaust Air Cleaning

et al. 2021

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The treatment of wastewaters containing hazardous volatile organic compounds (VOCs) requires the simultaneous treatment of both water and air. Refractory toluene, extensively studied for its removal, provides a basis for the comparison of its abatement methods. The oxidation of aqueous toluene by gas-phase pulsed corona discharge (PCD) in combination with the subsequent photocatalytic treatment of exhaust air was studied. The PCD treatment showed unequalled energy efficiencies in aqueous and gaseous toluene oxidation, reaching, respectively, up to 10.5 and 29.6 g·kW−1·h−1. The PCD exhaust air contained toluene residues and ozone in concentrations not exceeding 0.1 and 0.6 mg·L−1, respectively. As a result of the subsequent photocatalytic treatment, both airborne residues were eliminated within a contact time with TiO2 as short as 12 s. The results contribute to the possible application of the studied approach in closed-loop energy-saving ventilation systems.

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Influencing pathways and toxicity changes of pre-ozonation on carcinogenic NDEA formation from greenhouse gas adsorbent DEAPA in subsequent disinfection processes

Liu

Liao

Lin

et al. 2023

Science of The Total Environment

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Oxidation of aqueous N-nitrosodiethylamine: Experimental comparison of pulsed corona discharge with H2O2-assisted ozonation

Cited by 6 publications

References 30 publications

Oxidation of Aqueous Dexamethasone Solution by Gas-Phase Pulsed Corona Discharge

Oxidation of Aqueous Dexamethasone Solution by Gas-Phase Pulsed Corona Discharge

Oxidation of Aqueous Toluene by Gas-Phase Pulsed Corona Discharge in Air-Water Mixtures Followed by Photocatalytic Exhaust Air Cleaning

Influencing pathways and toxicity changes of pre-ozonation on carcinogenic NDEA formation from greenhouse gas adsorbent DEAPA in subsequent disinfection processes

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