Degradation of organic dyes by nanosecond pulsed discharge plasma

Qiu Congying; Guan Xiantao; Liu Zhen; Zhu Anna; Yan Keping

doi:10.11884/HPLPB202032.190390

Volume 32 Issue 2

Dec. 2019

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Qiu Congying, Guan Xiantao, Liu Zhen, et al. Degradation of organic dyes by nanosecond pulsed discharge plasma[J]. High Power Laser and Particle Beams, 2020, 32: 025010. doi: 10.11884/HPLPB202032.190390

Citation:

Qiu Congying, Guan Xiantao, Liu Zhen, et al. Degradation of organic dyes by nanosecond pulsed discharge plasma[J]. High Power Laser and Particle Beams, 2020, 32: 025010. doi: 10.11884/HPLPB202032.190390

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Degradation of organic dyes by nanosecond pulsed discharge plasma

doi: 10.11884/HPLPB202032.190390

1.
Institute of Industrial Ecology and Environment, Zhejiang University, Hangzhou 310028, China
2.
Research Institute of Chemical Defense, Academy of Military Science PLA China, State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China

Received Date: 2019-09-30
Rev Recd Date: 2019-11-01
Publish Date: 2019-12-26

Abstract

Abstract

Organic compounds (especially dyes compounds) are major pollutants in the industrial wastewater and have gained a great concern due to their hazardous influence on the environment and mankind’s health. A multiple pin-plane type pulsed corona discharge reactor was used to degrade Brilliant Crocein(Acid Red 73, AR73) continuously. The reactor was energized by a repetitive TLT based nanosecond pulsed power source. The source can produce pulses with a peak voltage of 50 kV, a pulse width of 40 ns, and a risetime of 20 ns at a repetition rate of up to 500 Hz. To evaluate the discharge performance, residual dye concentration and hydrogen peroxide (H₂O₂) were analyzed by UV spectrophotometry. The high voltage of 44.26 kV amplitude and frequency of 200 Hz were applied to the needles while wastewater film was used as the ground electrode. When the initial concentration of AR73 was 30 mg/L and the flow rate was 3.4 L/min, the degradation percentage of AR73 could reach up to 83.20% after 30 minutes of treatment with the needle-water distance of 30 mm. Under this condition, the input energy per pulse was 11.73 mJ, the concentration of H₂O₂ was up to 47.36 μmol/L, and the energy yield for 50% dye removal was 31.07 g·kW⁻¹·h⁻¹. Increasing the discharge voltage could further increase the degradation rate of AR73, and the active species generation in the solution was enhanced, but the energy efficiency decreased.
- nanosecond pulsed,
- corona discharge,
- non-thermal plasma,
- dye degradation,
- advanced oxidation

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References

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