Yield of Ozone,Nitrite Nitrogen and Hydrogen Peroxide Versus Discharge Parameter Using APPJ Under Water |
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| Affiliation: | 1. Department of Mathematics and Physics, Hohai University, Changzhou 213022, China;Jiangsu Province Key Laboratory of Environmental Engineering, Nanjing 210036, China;Hohai University Nantong Institute of Marine and Offshore Engineering, Nantong 226300,China;College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China;2. Jiangsu Province Key Laboratory of Environmental Engineering, Nanjing 210036, China;College of Internet of Things, Hohai University, Changzhou 213022, China;3. College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China;College of Internet of Things, Hohai University, Changzhou 213022, China;4. Hohai University Nantong Institute of Marine and Offshore Engineering, Nantong 226300,China;5. College of Internet of Things, Hohai University, Changzhou 213022, China;6. Jiangsu Province Key Laboratory of Environmental Engineering, Nanjing 210036, China |
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| Abstract: | Discharge plasma in and in contact with water can be accompanied with ultraviolet radiation and electron impact,thus can generate hydroxyl radicals,ozone,nitrite nitrogen and hydrogen peroxide.In this paper,a non-equilibrium plasma processing system was established by means of an atmospheric pressure plasma jet immersed in water.The hydroxyl intensities and discharge energy waveforms were tested.The results show that the positive and negative discharge energy peaks were asymmetric,where the positive discharge energy peak was greater than the negative one.Meanwhile,the yield of ozone and nitrite nitrogen was enhanced with the increase of both the treatment time and the discharge energy.Moreover,the p H value of treated water was reduced rapidly and maintained at a lower level.The residual concentration of hydrogen peroxide in APPJ treated water was kept at a low level.Additionally,both the efficiency energy ratio of the yield of ozone and nitrite nitrogen and that of the removal of p-nitrophenol increased as a function of discharge energy and discharge voltage.The experimental results were fully analyzed and the chemical reaction equations and the physical processes of discharges in water were given. |
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| Keywords: | atmospheric pressure plasma jet underwater discharge ozone nitrite nitrogen |
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