Elucidation of the degradation pathways of sulfonamide antibiotics in a dielectric barrier discharge plasma system

Kim, Kil-Seong; Kam, Sang Kyu; Mok, Young Sun

doi:10.1016/j.cej.2015.02.073

Cited by 98 publications

(30 citation statements)

References 44 publications

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“…The pH (and electrical conductivity) before and after plasma discharge was 6.47 (0 µS/cm) and 6.34 (1 µS/cm), respectively. These results are very similar to those obtained by Kim et al [41].…”

Section: B Inactivation Of E Coli and E Cloacae Bacteriasupporting

confidence: 93%

Experimental Evaluation of DBD Reactor Applied to Bacterial Inactivation in Water Flowing Continuously

Gutiérrez-León

Rodríguez-Méndez

López-Callejas

et al. 2016

IEEE Trans. Plasma Sci.

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In this paper, we present the evaluation of a DBD reactor that generates an energy per pulse of 65.3 mJ in order to inactivate E. coli ATCC 8739 at 10 3 , 10 6 , and 10 8 CFU/mL order concentrations and E. cloacae CDBB-B-963 at 10 3 and 10 7 CFU/mL order concentrations, in a volume of water flowing continuously. Particularly, experimentation is focused in 500 mL, under atmospheric pressure. The DBD reactor was coupled to a peristaltic pump type, a cooling jacket, containers for water in treatment and cooling fluid, and systems to monitor the experimental conditions. The implementation of the experiments was carried out at three different fluid flow rates: 2.0 ± 0.1, 3.5 ± 0.1, and 4.4 ± 0.1 mL/s; in each of them the time required to carry out a cycle of treatment corresponded to 256±7, 143 ± 2, and 113 ± 1 s, respectively. During the DBD application, water flowed continuously at recirculation mode, promoting the continuous oxygen injection at 8.3 mL/s. In the three established fluid flow rates, the efficacy of treatment reached 100% in inactivation of E. coli bacteria at 10 3 and 10 6 order concentrations at the end of the first cycle of treatment. At 10 8 CFU/mL order concentration, complete inactivation of E. coli bacteria was achieved at the end of the fourth cycle of treatment. Meanwhile, E. cloacae bacteria showed an inactivation of 100% at the end of the first cycle of treatment at 10 3 order concentration; when the order concentration increased to 10 7 , the efficacy of the process depended on the fluid flow rate, at 3.5 ± 0.1 and 2.0 ± 0.1 mL/s survival was 0% at the end of the first cycle of treatment; nevertheless, at the highest (4.4 ± 0.1 mL/s), an additional cycle was required.

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Section: B Inactivation Of E Coli and E Cloacae Bacteriasupporting

confidence: 93%

Experimental Evaluation of DBD Reactor Applied to Bacterial Inactivation in Water Flowing Continuously

Gutiérrez-León

Rodríguez-Méndez

López-Callejas

et al. 2016

IEEE Trans. Plasma Sci.

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“…The TOC removal efficiencies achieved were 25%, 33% and 45% for 60 kV, 70 kV and 80 kV respectively, after 15 min. In comparison with the HA removal efficiencies, the TOC removal efficiencies achieved were not more than 50%, which can be attributed to the formation of low-molecular weight compounds such as carboxylic acids before being completely mineralized [75].…”

Section: Mineralization Of Humic Acidmentioning

confidence: 84%

Humic acid and trihalomethane breakdown with potential by-product formations for atmospheric air plasma water treatment

Sarangapani¹,

Lü²,

Behan³

et al. 2018

Journal of Industrial and Engineering Chemistry

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A B S T R A C TIn this study an atmospheric air plasma reactor was studied for the degradation of HA and THMs in water. Plasma treatment showed significant breakdown efficacies for HA and THMs. At an applied voltage of 80 kV about 93% of HA and >70% of THMs were degraded after 15 min and 30 min treatment time respectively, with the degradation following a first order kinetic model. Plasma induced reactive species including nitrates and H 2 O 2 were quantified in the treated water. The results of FTIR analysis revealed that the molecular structure of HA was altered by the plasma treatment, with a decrease in aromaticity observed.

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“…Then ozone reacts with contaminants directly via molecular reactions and indirectly through radical type chain reactions, given as follows:

\cdot normalO + H_{2} normalO \to 2 \cdot normalO normalH

O_{3} + H_{2} normalO \vec{true} H_{2} O_{2} + O_{2}

O_{3} + normalO H^{-} \to {normalO}_{2}^{-} + \cdot normalH O_{2}

{normalO}_{2}^{-} + O_{3} + H^{+} \to \cdot normalH O_{3} + O_{2}

\cdot normalH O_{3} \to \cdot normalO normalH + O_{2}

\cdot normalO normalH + \cdot normalO normalH \to H_{2} O_{2}

It is obvious that there is competition between Equation and Equation . The decomposition of ozone (Equation ) will be enhanced and Equation will be suppressed with increasing pH value (pH > 2), which is not beneficial to formation of both H 2 O 2 (Equation ) and · OH (Equation ).…”

Section: Resultsmentioning

confidence: 99%

“…Then ozone reacts with contaminants directly via molecular reactions and indirectly through radical type chain reactions, given as follows: 25,39 ·…”

Section: Effect Of Ph Value On Decolorization Efficiencymentioning

confidence: 99%

Synthesis of a Fe/AC Fenton‐like catalyst and heterogeneous catalysis in decolorization of Sunset Yellow by pulsed high‐voltage discharge

Zhu

Liu

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND A new Fe/AC heterogeneous Fenton‐like catalyst was prepared using a dipping–sintering method. The prepared catalyst was characterized by X‐ray diffraction and scanning electron microscopy. The decolorization of Sunset Yellow was conducted in a self‐designed pulsed high‐voltage discharge system by the catalysis of the prepared heterogeneous catalyst. Effects of preparation conditions of catalyst (carrier material, sintering temperature and dipping time) and operating conditions (catalyst dosage, pH and treatment method) on decolorization efficiency were investigated. RESULTS Spherical activated carbon (AC) was selected as the carrier material and the optimal dipping time and sintering temperature were 8 h and 350 °C, respectively. The efficiency of decolorization of Sunset Yellow was above 90% after 30 min of a pulsed high‐voltage discharge process with 5 g heterogeneous catalyst and at pH 2.00. The utilization of copper mesh not only enhanced the decolorization of Sunset Yellow but also facilitated the reusability of the prepared heterogeneous catalyst. The efficiency of decolorization of Sunset Yellow with prepared Fe/AC heterogeneous Fenton‐like catalyst (5 g) was even a little higher than that with homogeneous catalyst (1.635 mmol L−1 Fe2+). The decolorization efficiency remained above 90% after ten recycles of the catalyst, indicating that the prepared heterogeneous catalyst has good stability and reusability. In addition, a possible catalytic mechanism for the decolorization reaction in a pulsed high‐voltage discharge system with prepared Fe/AC heterogeneous Fenton‐like catalyst was proposed by determination of H2O2 and ·OH concentrations in deionized water. CONCLUSIONS The prepared Fe/AC heterogeneous Fenton‐like catalyst efficiently degrades Sunset Yellow wastewater in a pulsed high‐voltage discharge system. © 2016 Society of Chemical Industry

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Elucidation of the degradation pathways of sulfonamide antibiotics in a dielectric barrier discharge plasma system

Cited by 98 publications

References 44 publications

Experimental Evaluation of DBD Reactor Applied to Bacterial Inactivation in Water Flowing Continuously

Experimental Evaluation of DBD Reactor Applied to Bacterial Inactivation in Water Flowing Continuously

Humic acid and trihalomethane breakdown with potential by-product formations for atmospheric air plasma water treatment

Synthesis of a Fe/AC Fenton‐like catalyst and heterogeneous catalysis in decolorization of Sunset Yellow by pulsed high‐voltage discharge

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