TY - JOUR
T1 - Ultrasonic-assisted ozone oxidation process for sulfamethoxazole removal
T2 - impact factors and degradation process
AU - Guo, Wan Qian
AU - Yin, Ren Li
AU - Zhou, Xian Jiao
AU - Cao, Hai Ou
AU - Chang, Jo Shu
AU - Ren, Nan Qi
N1 - Publisher Copyright:
© 2015 Balaban Desalination Publications. All rights reserved.
PY - 2016/9/19
Y1 - 2016/9/19
N2 - In 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/chemical oxygen demand ratio increased from 0 to 0.54. It was indicated that the UAOOP system was efficient to treat SMX wastewater and promote biodegradability for further biological treatment.
AB - In 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/chemical oxygen demand ratio increased from 0 to 0.54. It was indicated that the UAOOP system was efficient to treat SMX wastewater and promote biodegradability for further biological treatment.
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U2 - 10.1080/19443994.2015.1115373
DO - 10.1080/19443994.2015.1115373
M3 - Article
AN - SCOPUS:84946866564
SN - 1944-3994
VL - 57
SP - 21015
EP - 21022
JO - Desalination and Water Treatment
JF - Desalination and Water Treatment
IS - 44
ER -