[Home ] [Archive]   [ فارسی ]  
:: Main :: About :: Current Issue :: Accepted articles :: Archive :: Search :: Submit :: Contact ::
:: Volume 9, Issue 1 (12-2021) ::
jehe 2021, 9(1): 22-40 Back to browse issues page
Improving the efficiency of advanced photocatalytic oxidation process in the presence of sulfite for decomposition of metronidazole from aqueous solutions
Esrafil Asgari , Amir Sheikhmohammadi * , Bayram Hashemzadeh
Department of Environmental Health Engineering, Khoy University of Medical Sciences, Khoy, Iran
Abstract:   (286 Views)
 Metronidazole antibiotic is belong to the nitroimidazole family. Non degradability, high solubility in water, toxicity, carcinogenicity and mutagenicity are important concerns related to antibiotics. Therefore, the aim of this study is to apply the new advanced oxidation process of UV/zinc oxide/sulfite (UZS) to degrade metronidazole from aqueous solutions.
Methods: In this study, the effect of pH, sulfite to zinc oxide ratio, initial metronidazole concentration and contact time on the performance of the UV/sulfite/zinc oxide process in the degradation of metronidazole was studied. The residual concentration of metronidazole was measured by HPLC (Cecil model 4900 CE).
Results: The results showed more than 90 % antibiotic is degraded at pH = 12 and the molar ratio of sulfite to zinc oxide 1 to 3 after 5 min of the reaction. Although the antibiotic degradation rate in the UZS process was very high, based on the GC-MASS analysis, the mineralization rate was not sufficient. The several metabolites were detected in the UZS process effluent and the degradation pathway was proposed based on the identified metabolites. It was observed the kinetic coefficient of robs (mg/L. min) to degrade the metronidazole by UZS was 6.92 time and 15 time of UV/zinc oxide and UV alone processes, respectively.
Conclusion: According to the results, the UV/zinc oxide/sulfite process, due to the higher robs value as well as the higher efficiency value ​​than those of the UV/zinc oxide and UV alone processes, can be considered as a suitable and economical option in the degradation of metronidazole antibiotic and the similar compounds.
Keywords: Metronidazole, Sulfite, Zinc oxide, Advanced oxidation, Aqueous solutions.
Full-Text [PDF 693 kb]   (66 Downloads)    
Type of Study: Research | Subject: Special
Received: 2021/09/28 | Accepted: 2021/11/22 | Published: 2021/12/21
Add your comments about this article
Your username or Email:

CAPTCHA


XML   Persian Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Asgari E, Sheikhmohammadi A, Hashemzadeh B. Improving the efficiency of advanced photocatalytic oxidation process in the presence of sulfite for decomposition of metronidazole from aqueous solutions. jehe. 2021; 9 (1) :22-40
URL: http://jehe.abzums.ac.ir/article-1-895-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 9, Issue 1 (12-2021) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
Persian site map - English site map - Created in 0.04 seconds with 30 queries by YEKTAWEB 4422