Measurement of Reactive Hydroxyl Radical Species Inside the Biosolutions During Non-thermal Atmospheric Pressure Plasma Jet Bombardment onto the Solution

Kim, Yong Hee; Hong, Young June; Baik, Ku Youn; Kwon, Gi Chung; Choi, Jin Joo; Cho, Guang Sup; Uhm, Han S.; Kim, Do Young; Choi, Eun Ha

doi:10.1007/s11090-014-9538-0

Cited by 83 publications

(54 citation statements)

References 20 publications

(44 reference statements)

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“…The formation of O 2 and H 2 molecules was discovered as well. In study [25], the formation of Á OH radicals in a liquid phase was detected by absorption method under the action of argon plasma jet onto water surface. In study [26], Á OH radicals were monitored indirectly using the fluorescent properties of hydroxyterephthalic acid formed in the reaction of terephthalic acid with Á OH radicals.…”

Section: Kinetic Model Kinetic Model For Aqueous Solutionsmentioning

confidence: 99%

Kinetics and Mechanism of Cr(VI) Reduction in a Water Cathode Induced by Atmospheric Pressure DC Discharge in Air

Shutov

Sungurova

Choukourov

et al. 2016

Plasma Chem Plasma Process

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The process of reduction of Cr 6? ions (solution of potassium dichromate, K 2 Cr 2 O 7 ) in a water cathode was studied during a DC discharge in air. The concentration range of Cr 6? was (5.7-19) 910 -5 mol/l and discharge current range was 20-80 mA. Cr 6? ions were shown to be reversibly reduced under a discharge action. The equilibrium degree of reduction increased with increasing initial concentration of the solution at fixed discharge current. At fixed initial concentration the reduction degree increased with increasing discharge current. The reduction degrees so obtained were 0.34-0.84. A kinetic scheme of the processes taking place in a solution was proposed. The calculated data obtained as a result of application of this scheme described well the experimental results on Cr 6? kinetics. The main processes of Cr 6? reduction and Cr 3? oxidation were revealed. HO 2 Á radicals and hydrogen peroxide were shown to be responsible for Cr 6? reduction whereas Á OH radicals and O 2 molecules provide the reverse process of Cr 3? oxidation to Cr 6? . The mechanism of action of phenol additives improving the process efficiency is discussed. The efficiency of phenol action as a radical scavenger was shown to be determined with its mass-transfer to the reaction area rather than chemical reaction rate.

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Section: Kinetic Model Kinetic Model For Aqueous Solutionsmentioning

confidence: 99%

Kinetics and Mechanism of Cr(VI) Reduction in a Water Cathode Induced by Atmospheric Pressure DC Discharge in Air

Shutov

Sungurova

Choukourov

et al. 2016

Plasma Chem Plasma Process

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“…The gas residence time in study [5] was 6 min, whereas in our study it was *17 s. Undoubtedly, the increase in gas flow rate can lead to a gas cooling and to water molecules concentration and other neutral species dropping. The passing OH concentration through the maximum under the increase in a gas flow rate was observed in study [43].…”

Section: Resultsmentioning

confidence: 77%

Physical Parameters and Chemical Composition of a Nitrogen DC Discharge with Water Cathode

Smirnov

Shutov

Bobkova

et al. 2015

Plasma Chem Plasma Process

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This paper reports the results of the experimental study and chemical composition modeling for a DC nitrogen discharge burning above water cathode in the pressure range of 0.1-1 bar and at discharge current of 40 mA. The gas temperature, vibrational temperatures, reduced electric field strength, cathode voltage drop, and emission intensities of some nitrogen bands were obtained from experiment. The modeling chemical composition of plasma was carried out on the basis of these data. At modeling, the combined solution of Boltzmann equation for electrons, equations of vibrational kinetics for ground states of N 2 , O 2 , H 2 O and NO molecules, equations of chemical kinetics and plasma conductivity equation were used. The calculations agree with the measured bands intensities for the second positive system of N 2 and vibrational temperatures of N 2 ðC 3 P u Þ. In the frame of the model proposed, the data of other studies were explained. The second kind collision of electrons with N 2 vibration excited states was shown to affect strongly the electron gas parameters. The electron average energy and electron density are given. The difference between the properties of the discharges in N 2 and air at the same conditions are discussed as well.

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“…The obtained experimental data has shown that at the pH =11, the TNR degradation efficiencies and reaction rate are higher at pH= 11.Due to that at this pH, the ozone resulting in plasma discharge is easily converted in hydroxyl radical. This radical is more reactive in alkaline medium the in acid or neutral one that has suggested in [10].…”

Section: Influence Of Ph On the Tnr Degradationmentioning

confidence: 64%

A novel study on the degradation of styphnic acid from water by cold plasma technology

Tuan¹,

Hoang²,

Kim³

2017

IJOER

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Measurement of Reactive Hydroxyl Radical Species Inside the Biosolutions During Non-thermal Atmospheric Pressure Plasma Jet Bombardment onto the Solution

Cited by 83 publications

References 20 publications

Kinetics and Mechanism of Cr(VI) Reduction in a Water Cathode Induced by Atmospheric Pressure DC Discharge in Air

Kinetics and Mechanism of Cr(VI) Reduction in a Water Cathode Induced by Atmospheric Pressure DC Discharge in Air

Physical Parameters and Chemical Composition of a Nitrogen DC Discharge with Water Cathode

A novel study on the degradation of styphnic acid from water by cold plasma technology

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