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Vol. 32 No. 5 (2020): Vol 32 Issue 5

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Degradation Kinetics of 2,4,6-Trinitrophenol from Water Using Atmospheric Air Cold Plasma

Nguyen Van Hoang
Institute of New Technology, 17 Hoang Sam Street, Hanoi, Vietnam
Nguyen Cao Tuan
Institute of New Technology, 17 Hoang Sam Street, Hanoi, Vietnam
https://orcid.org/0000-0002-5339-8265

Corresponding Author(s) : Nguyen Van Hoang

minhtitvoi2009@gmail.com

Asian Journal of Chemistry, Vol. 32 No. 5 (2020): Vol 32 Issue 5

Abstract

The degradation studies of picric acid (2,4,6-trinitrophenol, TNP) in water sample through a dielectric barrier discharge (DBD) of atmospheric air cold plasma was carried out. The used DBD reactor consisted of comprised two electrodes that were separated by using an insulating dielectric barrier having a electric discharge voltage varying from of 7.0 to 22.0 kV. The effects of the initial concentration of TNP on the initial degradation rate was investigated methodically. The initial degradation rate was determined experimentally by changing the initial concentrations of TNP between 91.02 and 210.17 mg/L using the DBD of cold air plasma. From experimental results, a kinetic equation for TNP degradation was established based on varying initial concentration as –R = 0.0252CTNP/(1+0.0076CTNP). When 0.0076CTNP << 1, the kinetics of TNP degradation complied with the pseudo-first-order reaction. For TNP degradation kinetics, such as ln (Ct/C0) = 0.0269t + 0.1605, ln (Ct/C0) = 0.0197t + 0.0792, and ln (Ct/C0) = 0.014t + 0.0623, the initial concentrations of TNP were 91.02, 153.3 and 210.17 mg/L, respectively. Moreover, the effect of initial concentration of TNP and the electric power on the degradation efficiency of TNP were determined.

Keywords

Air cold plasma Dielectric barrier discharge Degradation Kinetics 2,4,6-Trinitrophenol
Hoang, N. V., & Tuan, N. C. (2020). Degradation Kinetics of 2,4,6-Trinitrophenol from Water Using Atmospheric Air Cold Plasma. Asian Journal of Chemistry, 32(5), 1116–1120. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/2420
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