REMEDIATION OF ATRAZINE CONTAMINATED SOIL BY DIELECTRIC BARRIER DISCHARGE PLASMA WITH SOIL SPRINKLE MODE

YU Zheng; LI Jie; JIANG Nan; LIU Zheng-yan; PENG Bang-fa; WU Yan

doi:10.13205/j.hjgc.202112032

Volume 39 Issue 12

Mar. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(12): 212-219

YU Zheng, LI Jie, JIANG Nan, LIU Zheng-yan, PENG Bang-fa, WU Yan. REMEDIATION OF ATRAZINE CONTAMINATED SOIL BY DIELECTRIC BARRIER DISCHARGE PLASMA WITH SOIL SPRINKLE MODE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 212-219. doi: 10.13205/j.hjgc.202112032

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YU Zheng, LI Jie, JIANG Nan, LIU Zheng-yan, PENG Bang-fa, WU Yan. REMEDIATION OF ATRAZINE CONTAMINATED SOIL BY DIELECTRIC BARRIER DISCHARGE PLASMA WITH SOIL SPRINKLE MODE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 212-219. doi: 10.13205/j.hjgc.202112032

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REMEDIATION OF ATRAZINE CONTAMINATED SOIL BY DIELECTRIC BARRIER DISCHARGE PLASMA WITH SOIL SPRINKLE MODE

doi: 10.13205/j.hjgc.202112032

1. School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China;
2. Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China

Received Date: 2020-08-18
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

A method that the pouring soil into the plasma of dielectric barrier discharge(DBD) to efficiently degrade atrazine in the soil was studied. The effects of soil characteristics and plasma generation parameters on atrazine degradation were investigated and the degradation intermediates were detected and analyzed. The experiment results showed that increasing voltage and frequency could improve the degradation efficiency of atrazine and reduce the energy efficiency. The increase of initial concentration would lead to the decrease of degradation efficiency and the increase of energy efficiency. The degradation efficiency and energy efficiency were decreased when soil particle size increased or pH decreased. As water content increased, degradation efficiency and energy efficiency first increased and then decreased. Under the conditions of peak-peak 36 kV, 200 Hz, and pH of 7.03, the degradation efficiency and energy efficiency of 10 mg/kg polluted dry soil with particle size of 60~80 were 70.95% and 0.014 mg/kJ after discharge treatment for 50 s. Through liquid chromatography-mass spectrometry, the intermediate products were tested to be atrazine-like substances such as dealkylation, dechlorination and ketone or aldehyde without any oligomer. As non-thermal plasma was generated around the soil particles, ozone and the short-lived active species, such as ·OH, jointly participated in the pollutant degradation process, resulting in enhanced reactor degradation effect.
- non-thermal plasma,
- dielectric barrier discharge,
- soil remediation,
- sprinkle mode,
- atrazine

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References(35)

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