Application of Heterogeneous Catalytic Ozonation Process with Magnesium Oxide Nanoparticles for Toluene Degradation in Aqueous Environments

Leili Mohammadi, Edris Bazrafshan, Meissam Noroozifar, Alireza Ansari-Moghaddam
2016 Health Scope  
Volatile organic compounds (VOCs) removal like toluene is an important concern for health of humans and the environment. Objectives: In this study, the efficiency of heterogeneous catalytic ozonation process (COP) with MgO nanoparticles for toluene degradation in aqueous solutions was investigated. Materials and Methods: Response surface methodology (RSM) using central composite design (CCD) was applied to study the interactions between critical operating factors and to find their optimum
more » ... their optimum levels. Four independent factors namely pH, catalyst dosage, ozonation time and concentration of toluene were transformed to coded values and consequently a second order quadratic model was prepared for responses prediction. Results: The analysis of variance (ANOVA) of the toluene degradation by COP/MgO nanoparticles showed F-value of 19.53 for the quadratic model indicating that the prepared model is significant. The predicted result showed that maximum degradation of toluene (~99.99%) could be achieved at pH 12, MgO dose 0.5 g, ozonation time of 50 minutes and initial toluene concentration of 10 mg/l. The correlation coefficient (R 2 = 0.9480) indicates a good correlation between the experimental and predicted values. Conclusions: According to the results, COP is an efficient and rapid method for removing of toluene from aqueous solutions.
doi:10.17795/jhealthscope-40439 fatcat:wggaypa4qzaeda2kncu6cyixlq