The Study of DEP Degradation Properties by Combination US and UV Lamp of Different Wavelength
作者： Seung-Min Na , Jinhua Cai , Dong-Hoon Shin , Mingcan Cui , Jee-Hyeong Khim
DOI: 10.5322/JES.2012.21.7.845
关键词: Irradiation 、 Diethyl phthalate 、 Sonochemistry 、 Reaction mechanism 、 Molar absorptivity 、 Reaction rate constant 、 Ultraviolet 、 Photochemistry 、 Hydroxyl radical 、 Chemistry
摘要: Abstract Diethyl phthalate (DEP) is widely spread in the natural environment as an endocrine disruption chemicals (EDs). Therefore, this study, ultrasound (US) and ultraviolet (UVC), including various applied power density (10-40 W/L), UV wavelengths (365 nm, 254 nm 185 nm) frequencies (283 kHz, 935 kHz) were to a DEP contaminated solution. The pseudo-first order degradation rate constants of 10 -1 -4 min depending on processes. Photolytic sonophotolytic also high at shortest wavelength (VUV) due higher energy photons, molar absorption coefficient increased hydroxyl radical generation from homolysis water. Sonolytic with increase input dominant reaction mechanism sonolysis was estimated by addition t-BuOH, which common scavenger. Moreover, synergistic effect observed for irradiation.
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