Ultrasonic-assisted ozone oxidation process for sulfamethoxazole removal: impact factors and degradation process
Ultrasonic-assisted ozone oxidation process for sulfamethoxazole removal: impact factors and degradation process
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DOI：
10.1080/19443994.2015.1115373
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发表时间：
2015-11
影响因子：
1.1
通讯作者：
Wanqian Guo;Renli Yin;Xian-Jiao Zhou;H. Cao;Jo‐Shu Chang;N. Ren
中科院分区：
文献类型：
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作者：
Wanqian Guo;Renli Yin;Xian-Jiao Zhou;H. Cao;Jo‐Shu Chang;N. Ren
摘要研究了超声辅助臭氧氧化法（UAOOP）对磺胺甲恶唑（SMX）的降解。研究了臭氧浓度、pH、SMX初始浓度、超声功率密度、自由基清除剂等因素的影响。实验证明，超声波的应用增强了臭氧氧化对SMX的降解作用。发现氧化过程中水的颜色变化与废水中SMX浓度的衰减相对应。结果表明，在实验条件下，SMX的降解符合准一级动力学模型。SMX的降解率随臭氧浓度、pH和超声功率密度的增加而增加，并与初始SMX浓度成反比。虽然UAOOP体系中臭氧的直接氧化和间接氧化同时存在，但以直接氧化为主。同时，该溶液的生物毒性减弱，生物需氧量和化学需氧量均降低。
AbstractIn this study, sulfamethoxazole (SMX) degradation was investigated using an ultrasonic-assisted ozone oxidation process (UAOOP). The influencing factors of ozone concentration, pH, initial SMX concentration, ultrasound power density, and radical scavenger were studied. It was proved that ultrasound application enhanced ozonation function for SMX degradation. Color change of the water during the oxidation process was found to be corresponding to SMX concentration decay in wastewater. The results indicated that SMX degradation followed a pseudo-first-order kinetic model under experimental operating conditions. SMX degradation rate increased with ozone concentration, pH, and ultrasound power density, and was inversely proportional to the initial SMX concentration. Although the direct and indirect oxidation of ozone simultaneously existed in the UAOOP system, the direct oxidation was the predominant way. Meanwhile, the biological toxicity of the solution was weakened and biological oxygen demand/chemi...