This study investigated the degradation characteristics and biodegradability of phenol, refractory organic matters, by injecting MgO and CaO-known to be catalyst materials for the ozonation process-into a Dielectric Barrier Discharge (DBD) plasma. MgO and CaO were injected at 0, 0.5, 1.0, and 2 g/L, and the pH was not adjusted separately to examine the optimal injection amounts of MgO and CaO. When MgO and CaO were injected, the phenol decomposition rate was increased, and the reaction time was found to decrease by 2.1 to 2.6 times. In addition, during CaO injection, intermediate products combined with Ca2+ to cause precipitation, which increased the COD (chemical oxygen demand) removal rate by approximately 2.4 times. The biodegradability of plasma treated water increased with increase in the phenol decomposition rate and increased as the amount of the generated intermediate products increased. The biodegradability was the highest in the plasma reaction with MgO injection as compared to when the DBD plasma pH was adjusted. Thus, it was found that a DBD plasma can degrade non-biodegradable phenols and increase biodegradability.

ABSTRACT
1. 서 론
2. 재료 및 실험방법
    2.1 실험장치
    2.2 촉매에 대한 영향
    2.3 플라즈마 처리된 페놀의 산소섭취율 영향
    2.4 분석방법
3. 결 과
    3.1 촉매 물질 주입에 대한 페놀분해 특성
    3.2 페놀 및 플라즈마 처리수의 산소섭취율 특성 비교
4. 결 론
References

• 신관우(충북대학교 환경공학과) | Gwanwoo Shin (Department of Environmental engineering, Chungbuk National University)
• 최승규(충북대학교 환경공학과) | Seungkyu Choi (Department of Environmental engineering, Chungbuk National University)
• 김진수(충북대학교 환경공학과) | Jinsu Kim (Department of Environmental engineering, Chungbuk National University)
• 원경자(충청북도보건환경연구원 환경조사과) | Kyoungja Weon (Environmental Analysis Section, Chungcheongbuk-do Research Institute of Health & Environment)
• 이상일(충북대학교 환경공학과) | Sangill Lee (Department of Environmental engineering, Chungbuk National University) Corresponding author