摘要
采用臭氧氧化法对模拟废水中难生物降解的呋吗唑酮 (FTD)进行降解实验研究 ,藉助UV VIS ,IR ,1 H NMR谱图对反应机理进行了初步探讨 .研究表明 ,pH值显著影响臭氧氧化的反应机理 :酸性条件下 ,臭氧以自身氧化为主 ,可迅速破坏FTD分子的共轭结构 ,但氧化不彻底 ;只有在强碱性条件下且保持臭氧氧化始终以·OH自由基反应为主时 ,方能高效地对FTD分子及中间体进行取代、开环、破坏和氧化 ,生成二氧化碳、水、无机氮及少量残余甲醛、草酸和低级脂肪酸 ,持续反应可完全矿化 .
Oxidation and degradation of bio-refractory furaltadone in simulated wastewater by ozone oxidation were experimentally studied.The reaction mechanism was explored primarily by UV,IR, 1H-NMR spectra analysis,which are in good agreement with one another.The results showed that ozonation mechanism is remarkably affected by pH value.At low pH values the major ozonation reaction is mainly through ozone itself which can easily destroy furaltadone molecule's conjugated structure but can not oxidize completely;only at bally high pH values hydroxyl radical oxidation progress can be maintained,which oxidize rapidly furaltadone into CO 2,H 2O,NH 3,NO - 3,a little of formaldehyde,oxalic acid and other small-molecular-weight fatty acids,which can be entirely mineralized by durative ozonation.
出处
《环境化学》
CAS
CSCD
北大核心
2004年第3期289-293,共5页
Environmental Chemistry
