Degradation of 2-nitrophenol from petrochemical wastewater by ozone

Shokri, Aref

doi:10.1134/s10704272150120216

Cited by 40 publications

(21 citation statements)

References 16 publications

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“…The surface morphology of zinc surface in 0.1 M HCl was recorded using scanning electron microscope. The SEM can investigate the changes in the morphological characteristics of the metal surface in the absence and presence of inhibitor [52,53]. SEM images for zinc immersed in 0.1 M HCl for 6 h duration in the absence and in the presence of optimized concentrations of seroquel are shown in Fig.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Kinetic modeling: a predictive tool for the adsorption of zinc ions onto calcium alginate beads

et al. 2013

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Inhibition action of seroquel on corrosion of zinc in 0.1 M HCl solution was investigated using weight loss, electrochemical potentiodynamic polarization and impedance spectroscopic techniques. Corrosion inhibition efficiency showed the positive effect with increase in concentration of inhibitor and with the increase in temperature. Results obtained from all the methods are in good agreement with each other. Inhibition effect of inhibitor is due to the adsorption of seroquel molecule on zinc surface from bulk of the solution and the process of adsorption follows Temkin's adsorption isotherm. Potentiodynamic polarization studies revealed that seroquel acts as a mixed type of inhibitor. Corrosion inhibition mechanism is explained by activation and thermodynamic parameters. Surface morphology of the corroded metal was studied by scanning electron microscopic studies and FT-IR spectrum of the corrosion product further confirms the process of adsorption of seroquel on metal surface.

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Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Kinetic modeling: a predictive tool for the adsorption of zinc ions onto calcium alginate beads

et al. 2013

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“…(12) results in: . By comparing the rate constant of this study with the previous research (k = 54.8 9 10 -3 min -1 ) [40], it is obvious that the rate constant depends on the type and initial concentration of the pollutant, dosage of ozone, features of the reactor and catalyst characteristics.…”

Section: Removal Of Codmentioning

confidence: 99%

“…When the concentration of OT was increased, the surface of TiO 2 was covered by pollutant molecules instead of ozone and subsequent production of the active agents for destroying the pollutant decreased. However, when the number of pollutant molecules was very low, their collisions with active sites were decreased and the degradation efficiency was reduced [27].…”

Section: The Effect Of the Initial Concentration Of Ot On The Removalmentioning

confidence: 99%

Degradation of ortho-toluidine from aqueous solution by the TiO2/O3 process

Shokri

Mahanpoor

2016

Int J Ind Chem

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In this work, the degradation and mineralization of ortho-toluidine (OT) that is one of the constituents of petrochemical wastewater was investigated by the TiO 2 /O 3 process. The influence of some operational parameters such as concentration of pollutant (30-90 mg L -1 ), initial pH and amounts of TiO 2 was investigated. A radical mechanism with the formation of an anion radical superoxide radical prior to hydroxyl radical is suggested for describing the interaction between ozone and TiO 2 . These results were not similar to the ozonation process alone, in which higher pH had a positive effect on the removal of OT because of the generation of hydroxyl radicals. In optimum pH for the ozonation and O 3 /TiO 2 processes, the degradation efficiency of the OT was 89.5 and 96%, respectively, at 60 min of reaction. Furthermore, it was made clear that in catalytic ozonation, the degradation efficiency of the OT was higher at neutral pH conditions (pH = 7). The removal of chemical oxygen demand (COD) was increased from 47.5% (only ozonation) to 73% (O 3 /TiO 2 ) after 90 min of reaction. The kinetics of degradation was pseudo-first order; the degradation and relative mineralization of the OT were calculated by HPLC and COD tests, respectively.

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“…Based on the environmental protection agency, the permissible limit of nitrophenols in aqueous solution is 1 mg/L. The remediation of wastewaters polluted with nitrophenols by traditional methods is really difficult, has high operational costs, secondary contamination and a long reaction time; subsequently, phenol derivatives are resistant according to their high solubility and stability in water [2]. Therefore, employing new methods for the treatment of the wastewater containing these pollutants without these problems is essential.…”

Section: Introductionmentioning

confidence: 99%

Application of Sono–photo-Fenton process for degradation of phenol derivatives in petrochemical wastewater using full factorial design of experiment

Shokri

2018

Int J Ind Chem

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In this study, the degradation and mineralization of petrochemical wastewater containing phenol and nitrophenol with chemical oxygen demand (COD) at 260 mg/L and total organic carbon (TOC) at 100 mg/L, were investigated by Sono-photo-Fenton process. The full factorial design of experiment was used to explore the influence of operational variables such as pH, initial concentration of hydrogen peroxide and Ferrous ions on the removal of COD. The analysis of variance (ANOVA) showed a high determination coefficient value (R 2 = 0.9884, R 2 pred = 0.9713, R 2 adj = 0.9822) for removal of COD and satisfactory prediction second-order regression model. The graphical response surface plots were employed to determine the optimum conditions. The operational variables were optimized by the model as follows: the [Fe 2+ ] = 24 mg/L, pH at 3, and [H 2 O 2 ] = 500 mg/L. The results showed that at the predicted optimum conditions and after 60 min of reaction, the degradation (removal of COD) and mineralization (removal of TOC) were 76.1 and 68.7%, respectively.

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Degradation of 2-nitrophenol from petrochemical wastewater by ozone

Cited by 40 publications

References 16 publications

Kinetic modeling: a predictive tool for the adsorption of zinc ions onto calcium alginate beads

Kinetic modeling: a predictive tool for the adsorption of zinc ions onto calcium alginate beads

Degradation of ortho-toluidine from aqueous solution by the TiO2/O3 process

Application of Sono–photo-Fenton process for degradation of phenol derivatives in petrochemical wastewater using full factorial design of experiment

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