scholarly journals Removal of COD and color from Direct Blue 71 azo dye wastewater by Fenton’s oxidation: Kinetic study

2017 ◽  
Vol 10 ◽  
pp. S1158-S1163 ◽  
Author(s):  
Nese Ertugay ◽  
Filiz Nuran Acar
Keyword(s):  
Kinetic Study ◽  
Azo Dye ◽  
Oxidation Kinetic ◽  
Dye Wastewater ◽  
Fenton’S Oxidation ◽  
Direct Blue ◽  
Fenton's Oxidation ◽  
Direct Blue 71

A bipyridinium-based polyhydrazone adsorbent that exhibits ultrahigh adsorption capacity for the anionic azo dye, direct blue 71

2021 ◽  
Vol 409 ◽  
pp. 128195
Author(s):  
Tamer El Malah ◽  
Hany F. Nour ◽  
Emad K. Radwan ◽  
Randa E. Abdel Mageid ◽  
Tawfik A. Khattab ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Azo Dye ◽  
Direct Blue ◽  
Direct Blue 71

scholarly journals A novel process of dye wastewater treatment by linking advanced chemical oxidation with biological oxidation

2015 ◽  
Vol 41 (4) ◽  
pp. 33-39 ◽  
Author(s):  
Haiming Zou ◽  
Wanzheng Ma ◽  
Yan Wang
Keyword(s):  
Oxidation Process ◽  
Chemical Oxidation ◽  
Chinese Government ◽  
Biological Oxidation ◽  
Dye Wastewater ◽  
Organic Substances ◽  
Combination Process ◽  
Fenton’S Oxidation ◽  
New Process ◽  
Fenton's Oxidation

Abstract Dye wastewater is one of typically non-biodegradable industrial effluents. A new process linking Fenton’s oxidation with biological oxidation proposed in this study was investigated to degrade the organic substances from real dye wastewater. During the combination process, the Fenton’s oxidation process can reduce the organic load and enhance biodegradability of dye wastewater, which is followed by biological aerated filter (BAF) system to further remove organic substances in terms of discharge requirement. The results showed that 97.6% of chemical oxygen demand (COD) removal by the combination process was achieved at the optimum process parameters: pH of 3.5, H2O2 of 2.0 mL/L, Fe(II) of 500 mg/L, 2.0 h treatment time in the Fenton’s oxidation process and hydraulic retention time (HRT) of 5 h in the BAF system. Under these conditions, COD concentration of effluent was 72.6 mg/L whereas 3020 mg/L in the influent, thus meeting the requirement of treated dye wastewater discharge performed by Chinese government (less than 100 mg/L). These results obtained here suggest that the new process combining Fenton’s oxidation with biological oxidation may provide an economical and effective alternative for treatment of non-biodegradable industrial wastewater.

A Study of Fenton’s Oxidation Pretreatment on Dye Wastewater Containing Acetic Acid

2014 ◽  
Vol 1044-1045 ◽  
pp. 215-218
Author(s):  
Xian Huan Qiu ◽  
Hai Yu ◽  
Peng Fei Deng
Keyword(s):  
Acetic Acid ◽  
Processing Time ◽  
Ph Value ◽  
Removal Rate ◽  
Cod Removal ◽  
Dye Wastewater ◽  
Fenton’S Oxidation ◽  
Effects Of Ph ◽  
Cod Removal Rate ◽  
Fenton's Oxidation

In the presence of acetic acid, the effects of pH, processing time, addition of Fe2+ and H2O2 on dye wastewater treatment were studied. Experimental results showed that in the presence of acetic acid, when the pH value was 4, the processing time was 30.0min, addition of ferrous sulfate was 4.8g/L, and addition of hydrogen peroxide was 56mL/L, the treatment effect was the best, COD removal rate reached 51.0%. Further studied of the effect of the presence of acetic acid on Fenton’s oxidation of dye wastewater, the results showed that without of acetic acid, the COD removal rate was higher than that with acetic acid. And the effect of Fenton's reagent on oxidation of dye substances was interfered by the presence of acetic acid.

Azo dye functionalized graphene nanoplatelets for selective detection of bisphenol A and hydrogen peroxide

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87295-87305 ◽  
Author(s):  
Nael G. Yasri ◽  
Ashok K. Sundramoorthy ◽  
Sundaram Gunasekaran
Keyword(s):  
Hydrogen Peroxide ◽  
Bisphenol A ◽  
Azo Dye ◽  
Saline Solution ◽  
Graphene Nanoplatelets ◽  
Direct Blue ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Phosphate Buffered Saline ◽  
Direct Blue 71

A new electrochemical sensor is developed based on graphene nanoplatelets functionalized with tri-azo dye (direct blue 71) for selective and highly sensitive detection of bisphenol A and hydrogen peroxide in pH 7 phosphate buffered saline solution.

Modeling and optimization of acid dye manufacturing wastewater treatment with Fenton's reagent: comparison with electrocoagulation treatment results and effects on activated sludge inhibition

2010 ◽  
Vol 62 (1) ◽  
pp. 209-216 ◽  
Author(s):  
Idil Arslan-Alaton ◽  
B. Hande Gursoy ◽  
Abdurahman Akyol ◽  
Mehmet Kobya ◽  
Mahmut Bayramoglu
Keyword(s):  
Reaction Time ◽  
Organic Carbon ◽  
Azo Dye ◽  
Polynomial Regression ◽  
Oxygen Demand ◽  
Inhibitory Effect ◽  
Interactive Effects ◽  
Treatment Results ◽  
Fenton’S Oxidation ◽  
Fenton's Oxidation

In the present study, Fenton's oxidation of a chromium complex disazo dye (Acid Blue 193) synthesis wastewater was evaluated, modeled and optimized by employing Central Composite Design. Within this context, the individual and interactive effects of critical process parameters such as Fe2 + , H2O2 concentrations, initial chemical oxygen demand (COD) and reaction time was assessed. The process response (output) variables were chosen as percent color, COD and total organic carbon (TOC) removal efficiencies. Optimum working conditions in terms of color and organic carbon removals were established to be Fe2 +  = 3 mM; H2O2 = 25 mM; reaction time = 10 min at pH 3 and an initial COD content of 245 mg/L. Under these conditions, 96% color, 82% COD and 51% TOC removals were obtained. The established polynomial regression models describing color, COD and TOC removals satisfactorily fitted the experimental data and could be used to predict Fenton's treatment results at statistically significant rates. Optimized treatment results were compared with those obtained via electrocoagulation treatment under optimized conditions (applied current = 50 A/m2; reaction time = 15 min; initial pH = 7 for an initial COD content of 245 mg/L). The relative inhibition of heterotrophic oxygen uptake rate was measured to examine the inhibitory effect of azo dye synthesis effluent before and after Fenton's oxidation and electrocoagulation with respect to synthetic domestic wastewater. Untreated azo dye production wastewater exhibited a slightly inhibitory effect that was appreciably reduced but not entirely removed after Fenton's oxidation, whereas no inhibition of mixed bioculture was observed for azo dye synthesis effluent subjected to electrocoagulation treatment.

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