Investigation of UV/H2O2 process for removal of ortho-toluidine from industrial wastewater by response surface methodology based on the central composite design

Shokri, Aref

doi:10.5004/dwt.2017.0292

Cited by 31 publications

(15 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TiOH + H +  TiOH2 + pH <pHpzc (4) TiOH + OH −  TiO − + H2O pH >pHpzc (5) where TiOH2 + , TiO − and TiOH are the positive, negative and neutral surface hydroxyl groups, respectively [24]. These properties caused changes in the structure of pollutant at various pH and subsequently adsorption on TiO2 surface [25].…”

Section: Effect Of Ph In Uv/tio2 Processmentioning

confidence: 99%

See 1 more Smart Citation

Using Experimental Design to Optimize the Photo-degradation of P-Nitro Toluene by Nano-TiO2 in Synthetic Wastewater

Rostami

Mazaheri

Joshaghani

et al. 2019

IJE

View full text Add to dashboard Cite

In this project, the degradation of synthetic wastewater comprising p-nitro toluene (PNT) is investigated using UV/TiO2 process. PNT as a pollutant has a very harmful effect on the environment and human hormones. TiO2 is one of the best metal oxides it has photo catalyst role. The full factorial design (FFD) of experiment is employed to investigate the effect of working variables including pH, initial dosage of PNT and catalyst concentration. The Analysis of variance (ANOVA) presented a high determination coefficient value (R 2 = 0.9876, R 2 pred = 0.8585, R 2 adj = 0.9596) for degradation of PNT and acceptable prediction of second-order regression model. The graphical counter plots were used to control the optimum conditions. The operative variables are optimized at [TiO2] = 0.2g/L , pH value of 4, and [PNT] = 50mg/L. These findings suggest that the percentages of degradation and mineralization of PNT at the forecasted optimum conditions after 120 min of reaction were 64 and 55%, respectively.

show abstract

Section: Effect Of Ph In Uv/tio2 Processmentioning

confidence: 99%

“…AOPs produce hydroxyl radicals which are oversensitive and general oxidants. They have high electrochemical oxidation potential for the degradation of chemical compounds [4].…”

Section: Introductionmentioning

confidence: 99%

Using Experimental Design to Optimize the Photo-degradation of P-Nitro Toluene by Nano-TiO2 in Synthetic Wastewater

Rostami

Mazaheri

Joshaghani

et al. 2019

IJE

View full text Add to dashboard Cite

show abstract

“…The experimental data exhibited that the UV and H 2 O 2 process have a slight effect on the degradation of TDA when they were used separately (data not showed here). Many researchers have stated that the concentration of H 2 O 2 has a main effect on the UV/H 2 O 2 process (8,13). The degradation efficiency of TDA versus irradiation time at different initial dosages of H 2 O 2 has been shown in…”

Section: Effect Of the Initial Concentration Of H 2 Omentioning

confidence: 99%

“…Several advanced oxidation processes (AOPs) have been suggested and widely used for the degradation of many toxic, nonbiodegradable, carcinogenic and mutagenic contaminants (7). The AOPs based on the UV/H 2 O 2 system had high efficiency in the degradation of several Organic pollutants (8). The UV/H 2 O 2 process has many benefits such as high removal of COD and no production of sludge (9).…”

mentioning

confidence: 99%

Employing UV/H2O2 process for degradation of 2,4-Diaminotoluene in synthetic wastewater

Hosseini

Shokri

2017

Arch Hyg Sci

View full text Add to dashboard Cite

Toluene diamine (TDA) is a main carcinogenic raw material for the manufacture of toluene diisocyanate (TDI), dye corrosion inhibitors, rubber antioxidants and polyurethane foams (1). They can be transferred to surface water through wastewater discharge from industrial plants. TDA has high water solubility and it can penetrate through soil causing the groundwater contamination (2−3). Aromatic amines are environmental pollutants that are mutagenic in microorganisms and mammalian cells which have been reported to be cancer-causing in rodents. Despite the wide range of the conventional methods such as biological and physicalchemical treatment (coagulation-flocculation, and activated carbon adsorption), they are not suitably efficient because dyes are scarcely removable according to their low molecular

show abstract

“…In this study, the effect of three independent variables on the response function was investigated by the FFD and RSM, to obtain the optimum conditions. The mathematical relation between the response and three important variables can be estimated by a quadratic polynomial equation [21]. An empirical relation between the response (removal of COD) and independent variables was obtained and expressed by the following second-order polynomial equations (Eq.…”

Section: Anova Tests For the Removal Of Cod In Sonophoto-fenton Processmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Investigation of UV/H2O2 process for removal of ortho-toluidine from industrial wastewater by response surface methodology based on the central composite design

Cited by 31 publications

References 24 publications

Using Experimental Design to Optimize the Photo-degradation of P-Nitro Toluene by Nano-TiO2 in Synthetic Wastewater

Using Experimental Design to Optimize the Photo-degradation of P-Nitro Toluene by Nano-TiO2 in Synthetic Wastewater

Employing UV/H2O2 process for degradation of 2,4-Diaminotoluene in synthetic wastewater

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

Contact Info

Product

Resources

About