상하수도학회지 제33권 제4호 (p.243-250)

수중 유전체 장벽 방전 플라즈마를 이용한 페놀의 분해 특성

Characteristics of phenol degradation by using underwater dielectric barrier discharge plasma
키워드 :
Advanced oxidation process,Dielectric barrier discharge plasma,Discharge power,Phenol degradation,고급산화공정,유전체 장벽 방전 플라즈마,방전 전력,페놀 분해

목차

ABSTRACT
1. 서 론
2. 재료 및 실험방법
2.1 실험장치
2.2 용존오존 측정방법
2.3 pH에 따른 페놀 제거 특성
2.4 전력에 따른 페놀 제거 특성
2.5 분석방법
3. 결 과
3.1 공기 유량 및 방전전력에 따른 용존오존농도의 변화
3.2 pH에 따른 페놀 및 COD 제거 특성 비교
3.3 방전전력에 따른 페놀 및 COD 제거 특성
4. 결 론
References

초록

This objective of this study was to investigate the degradation characteristics of phenol, a refractory substance, by using a submerged dielectric barrier discharge (DBD) plasma reactor. To indirectly determine the concentration of active species produced in the DBD plasma, the dissolved ozone was measured. To investigate the phenol degradation characteristics, the phenol and chemical oxygen demand (COD) concentrations were evaluated based on pH and the discharge power. The dissolved ozone was measured based on the air flow rate and power discharged. The highest dissolved ozone concentration was recorded when the injected air flow rate was 5 L/min. At a discharge power of 40W as compared to 70W, the dissolved ozone was approximately 2.7 – 6.5 times higher. In regards to phenol degradation, the final degradation rate was highest at about 74.06%, when the initial pH was 10. At a discharged power of 40W, the rate of phenol decomposition was observed to be approximately 1.25 times higher compared to when the discharged power was 70W. It was established that the phenol degradation reaction was a primary reaction, and when the discharge power was 40W as opposed to 70W, the reaction rate constant(k) was approximately 1.72 times higher.