Photooxidation Process Efficiency (UV/O3) for P-nitroaniline Removal from Aqueous Solutions

-nitroaniline (PNA) is a common contaminant in the petrochemical industry wastewater, which is resulted from the production of pesticides, dyes and glues. In this research, PNA degradation was investigated by ozonation (O 3 ) with ultraviolet radiation (O 3 /UV) in the aqueous solution. Moreover, th...

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Bibliographic Details
Published in:Ozone: science & engineering 2020-09, Vol.42 (5), p.420-427
Main Authors: Rajabizadeh, Kobra, Yazdanpanah, Ghazal, Dowlatshahi, Shidvash, Malakootian, Mohammad
Format: Article
Language:English
Subjects:
Adhesives
Advanced oxidation process
Aqueous solutions
Coal industry wastewaters
coal washing plant wastewater
Contaminants
Degradation
Glues
Industrial wastes
Industrial wastewater
Kinetics
Ozonation
Ozone
p-nitroaniline
Pesticides
Petrochemicals industry
pH effects
Photooxidation
Reaction kinetics
Reaction time
Ultraviolet radiation
UV light
Wastewater
Wastewater pollution
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Summary:-nitroaniline (PNA) is a common contaminant in the petrochemical industry wastewater, which is resulted from the production of pesticides, dyes and glues. In this research, PNA degradation was investigated by ozonation (O 3 ) with ultraviolet radiation (O 3 /UV) in the aqueous solution. Moreover, the effective parameters such as initial concentration of PNA, input supply rate of ozone, contact times and pH were investigated and optimized. The experiments were carried out in optimal conditions on coal washing plant wastewater as a real sample. The optimal conditions were as follows: initial PNA concentration = 10 mg/L, ozone input supply rate = 0.9 g/h, contact time = 40 minutes, and pH = 9. The highest PNA degradation of the process under the optimal conditions in the synthetic solution and real examples was obtained 94% and 81%, respectively. In the synthetic samples, when the reaction time was more than 30 minutes, the TOC maximum removal efficiency was obtained 81%. Evaluation of kinetics linear models indicated that the data followed pseudo-first-order kinetics. According to the results, the mentioned process could be a suitable method for PNA degradation from industrial wastewater.
ISSN:0191-9512
1547-6545
DOI:10.1080/01919512.2019.1679614