Kinetic study of an immobilized iron oxide for catalytic degradation of azo dye reactive black B with catalytic decomposition of hydrogen peroxide

2009 ◽  
Vol 10 (5) ◽  
pp. 561-566 ◽  
Author(s):  
C.P. Huang ◽  
Y.F. Huang ◽  
H.P. Cheng ◽  
Y.H. Huang
Keyword(s):  
Hydrogen Peroxide ◽  
Iron Oxide ◽  
Kinetic Study ◽  
Azo Dye ◽  
Catalytic Decomposition ◽  
Catalytic Degradation ◽  
Degradation Of Azo Dye

Catalytic Degradation of Azo Dye Congo Red in Aqueous Solution by LiMn2O4

2013 ◽  
Vol 634-638 ◽  
pp. 500-503
Author(s):  
Yun Hui Long ◽  
Jun Ming Guo ◽  
Du Shu Huang ◽  
Gui Yang Liu
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Azo Dye ◽  
Orthogonal Experiment ◽  
Catalytic Degradation ◽  
Spinel Limn2o4 ◽  
Experimental Conditions ◽  
Initial Ph ◽  
Degradation Of Azo Dye

Catalytic degradation of azo dye Congo red in aqueous solution by spinel LiMn2O4 was studied. Degradation conditions were also optimized by orthogonal experiment. The results showe that the optimal degradation experimental conditions are: The initial pH is 3.0; The amount of catalyst is 10.0 mg; The amount of 30% H2O2 is 2.00 mL. The decolourization ratio of 20 mL 20 mg/L Congo red solution is 85.95%.

scholarly journals Tratamiento fotocatalítico de una disolución acuosa de azocolorante Negro Ácido 52 utilizando como catalizador diferentes mezclas de óxidos semiconductores

2019 ◽  
pp. 9-13
Author(s):  
Esteban Montiel-Palacios ◽  
Josefina Vergara-Sánchez ◽  
César Torres-Segundo ◽  
Gregorio Bahena-Delgado
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Adverse Effects ◽  
Azo Dye ◽  
Manganese Oxides ◽  
Batch Reactor ◽  
Experimental System ◽  
Visible Radiation ◽  
Semiconductor Oxides ◽  
Degradation Of Azo Dye

In this study, the photocatalytic degradation of azo dye Acid Black 52 using different mixtures of semiconductor oxides as a catalyst is reported. The experimental system consisted of a Batch reactor in which the azo dye, the semiconductor oxides and the hydrogen peroxide were mixed, whose concentrations were 0.1 mM, 100 mg/L and 65.2 mM, respectively. The mixture was homogenized by a magnetic stirrer and the pH was adjusted to 3.0. The initial volume was 500 mL. A white light lamp (127 V, 60 Hz, 362 mA, 60 W, 60 lm/W) was placed coaxial to the reactor and turned on to activate the catalyst. Samples were taken every 30 minutes to measure the absorbance, for this purpose a HACH DR3900 spectrophotometer was used. After 180 minutes of treatment, the best result, 60% degradation of the azo dye, was obtained with the mixture manganese oxides-iron oxides. The purpose of this work was to completely transform the pollutant into carbon dioxide, to avoid its adverse effects on the environment and human health, using catalysts excited with visible radiation.

Investigation of the solution initial pH effects on the performance of UV/Fe-ZSM5/H2O2 process

2010 ◽  
Vol 61 (8) ◽  
pp. 2143-2149 ◽  
Author(s):  
M. B. Kasiri ◽  
A. Aleboyeh ◽  
H. Aleboyeh
Keyword(s):  
Hydrogen Peroxide ◽  
Azo Dye ◽  
Dye Degradation ◽  
Ion Concentration ◽  
Ph Effects ◽  
Fenton Process ◽  
Zsm5 Zeolite ◽  
Initial Ph ◽  
Fe Ions ◽  
Degradation Of Azo Dye

Effect of the solution initial pH was investigated on the performance of photo-Fenton process using Fe-ZSM5 zeolite as a heterogeneous catalyst for degradation of azo dye Acid Red 14. All experiments were performed in a 1.0 L tubular closed circulation batch photo-reactor. The dye degradation quantum yield was maximal when the solution initial pH was about 5. An amount of about 0.3 mg L−1 of Fe ions leached out of the zeolite. However, monitoring Fe ion concentration during the experiments showed that the efficiency of the process is not due to the leached Fe ions. The effect of pH on decomposition rate of hydrogen peroxide in different systems such as H2O2 alone, UV/H2O2, UV/Zeolite and UV/Zeolite/H2O2 was explored in detail to explain the results obtained.

Degradation of Azo Dye Wastewater by UV/TiO2 Combined with an Ultrasonic Procedure

2014 ◽  
Vol 618 ◽  
pp. 164-169
Author(s):  
Yung Hsu Hsieh ◽  
Chen Yu Chang ◽  
Min Wun Chen ◽  
Meng Kuan Shen
Keyword(s):  
Hydrogen Peroxide ◽  
Azo Dye ◽  
Degradation Rate ◽  
Experimental Results ◽  
Additive Effects ◽  
Iron Ions ◽  
Dye Wastewater ◽  
Fe Ions ◽  
Degradation Of Azo Dye

The study combines the UV/TiO2and an ultrasonic procedure to degrade the azo dye wastewater of Acid Yellow 17 and investigates the effects of various factors including the quantities of TiO2and iron ions added on the efficiency of the removal of the azo dye wastewater of Acid Yellow 17. The experimental results reveal the a significant additive effects occurs through the combination of the two procedures under the 13 watts UV irradiations and 10 watts ultrasound. The analysis of the catalyst properties indicates that there are no evident changes of the appearance of the crystal and TiO2catalyst when UV/TiO2is combined with ultrasonic procedures. Since the formation of hydrogen peroxide (ND≦1 mg L-1) was not detected during the reactions, the additions of Fe (II) and Fe (III) are unable to induce the Fenton-like reaction effectively. Nevertheless, the additions of Fe ions significantly affect the degradation rate of the dye. Moreover, the effect of Fe (III) was found to be superior to that of Fe (II) under the same concentration.

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