Diethyl phthalate (DEP) is widely spread in the natural environment as an endocrine disruption chemicals (EDs). Therefore, in this study, ultrasound (US) and ultraviolet (UVC), including various applied power density (10-40 W/L), UV wavelengths (365 nm, 254 nm and 185 nm) and frequencies (283 kHz, 935 kHz) were applied to a DEP contaminated solution. The pseudo-first order degradation rate constants were in the order of 10-1 to 10-4 min-1 depending on the processes. Photolytic and sonophotolytic DEP degradation rate also were high at shortest UV wavelength (VUV) due to the higher energy of photons, higher molar absorption coefficient of DEP and increased hydroxyl radical generation from homolysis of water. Sonolytic DEP degradation rate increased with increase of applied input power and the dominant reaction mechanism of DEP in sonolysis was estimated as hydroxyl radical reaction by the addition of t-BuOH, which is a common hydroxyl radical scavenger. Moreover, synergistic effect of were also observed for sonophotolytic degradation with various UV irradiation.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 시약 및 실험장치
  2.2. 분석항목 및 방법
 3. 결과 및 고찰
  3.1. 다양한 자외선 파장(VUV, UVC 그리고 UVA)에서 DEP 분해속도
  3.2. 초음파 처리에 따른 DEP 분해속도
  3.3. 초음파/자외선 공정 시 DEP 분해속도 향상 (Synergistic Effect) 관찰 및 주파수(283 and 935 kHz)가 미치는 영향
 4. 결 론
 참 고 문 헌

• 나승민(고려대학교 건축사회환경공학과) | Seung-Min Na (Department of Civil Environmental and Architecture, Korea University)
• Jinhua Cai(고려대학교 건축사회환경공학과)
• 신동훈(고려대학교 건축사회환경공학과) | Dong-Hoon Shin (Department of Civil Environmental and Architecture, Korea University)
• Mingcan Cui(고려대학교 건축사회환경공학과)
• 김지형(고려대학교 건축사회환경공학과) | Jee-Hyeong Khim (Department of Civil Environmental and Architecture, Korea University) Corresponding author