- Volume 16 Issue 1
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Degradation of the Selected Pesticides by Gas Discharge Plasma
기체플라즈마에 의한 농약분해특성 연구
- Min, Zaw Win (Chemical Safety Division, Department of Agro-food Safety, Rural Development Administration, National Academy of Agricultural Science) ;
- Hong, Su-Myeong (Chemical Safety Division, Department of Agro-food Safety, Rural Development Administration, National Academy of Agricultural Science) ;
- Mok, Chul-Kyoon (Gachon University) ;
- Im, Geon-Jae (Chemical Safety Division, Department of Agro-food Safety, Rural Development Administration, National Academy of Agricultural Science)
- Received : 2011.12.02
- Accepted : 2012.02.28
- Published : 2012.03.31
As increasing the use of pesticides both in number and amount to boost crop production, consumer concerns over food quality and safety with respect to residual pesticides are also continuously increasing. However, there is still lacking of information that can effectively help to remove residual pesticides in foods. In recent years, contaminant removal by gas (or) glow discharge plasma (GDP) attracts great interests on environmental scientists because of its high removal efficiency and environmental compatibility. It was shown to be effective for the removal of some organophosphorus pesticides, phenols, benzoic acid, dyes, and nitrobenzene on solid substrate or in aqueous solution. This work mainly focuses on the removal of wide range of residual pesticides from fresh fruits and vegetables. As for preliminary study, the experiments were carried out to investigate whether GDP can be used as an effective tool for degrading target pesticides or not. With this objective, 60 selected pesticides drop wised onto glass slides were exposed to two types of GDP, dielectric barrier discharge plasma (DBDP) and low pressure discharge plasma (LPDP), for 5 min. Then, they were washed with 2 mL MeCN which were collected and used for determination of remaining concentration of pesticides using LC-MS/MS. Among selected pesticides, degradation of 18 pesticides (endosulfan-total was counted as one pesticide) by GDP could not be examined because control treatments, which were left in ambient environment, of those pesticides recovered less than 70% or even did not recover. However, majority of tested pesticides (42) were degraded by both types of GDP with satisfactory recovery (>80%) of control sample. Pesticides degradation ranged from 66.88% to 100% were achieved by both types of plasma except clothianidin which degradation in LPDP was 26.9%. The results clearly indicate that both types of gas discharge plasma are promising tools for degrading wide range of pesticides on glass substrate.
Gas discharge plasma;dielectric barrier discharge plasma;low pressure discharge plasma;pesticides;food safety
Supported by : Rural Development Administration
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