scholarly journals Oxidative decolorization of a malachite green oxalate dye through the Photochemical Advanced Oxidation Processes

2019 ◽  
Keyword(s):  
Malachite Green ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Similar Reaction ◽  
Fenton Process ◽  
Oxidation Processes ◽  
Oxidant Concentration ◽  
Decolorization Efficiency ◽  
Optimal Value ◽  
Malachite Green Oxalate

<p>This report was aimed at an investigation of efficiency for Photochemical Advanced Oxidation Processes (UV photolysis, UV/H2O2, UV/TiO2, UV/H2O2/TiO2 and UV/H2O2/Fe2+ processes) to decolorize Malachite Green Oxalate (MGO) dye. Experimental runs were performed using laboratory scale photochemical reactor. About 98% decolorization was obtained with initial 100 ppm MGO dye in Photo-Fenton process under optimal conditions (60 ppm Fe2+ concentration, 12 mM of oxidant concentration, at pH 3.0 for 60 min). 97% decolorization was obtained using UV/H2O2/TiO2 process having [TiO2]o of 0.6 gm/L for similar reaction conditions. The percentage decolorization of MGO was in range of 94-95% for both UV/TiO2 and UV/H2O2 processes. Concentration of ferrous salt (60 ppm) was considered as an optimal value to carry out the UV/H2O2/Fe2+ process for MGO decolorization. Influence of oxidant (H2O2) and Fe2+ ions for oxidation of MGO was studied in Photo-Fenton process. Sulphate radical based AOPs was proved to be more effective in treating MGO dye with irradiation. Results indicate that decolorization efficiency by Photochemical AOPs for MGO dye in photochemical reactor were more efficient. Pseudo-first-order model of kinetics was noticed to be the best model fit to explain the decolorization of MGO dye solution.</p>

Degradation of propoxycarbazone-sodium with advanced oxidation processes

2011 ◽  
Vol 11 (1) ◽  
pp. 129-134 ◽  
Author(s):  
A. Dulov ◽  
N. Dulova ◽  
Y. Veressinina ◽  
M. Trapido
Keyword(s):  
Rate Constants ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Oxidation Processes ◽  
First Order ◽  
Order Rate ◽  
Conversion Time ◽  
Pseudo First Order ◽  
Kinetics Of

The degradation of propoxycarbazone-sodium, an active component of commercial herbicide, in aqueous solution with ozone, UV photolysis and advanced oxidation processes: O3/UV, O3/UV/H2O2, H2O2/UV, and the Fenton process was studied. All these methods of degradation proved feasible. The kinetics of propoxycarbazone-sodium degradation in water followed the pseudo-first order equation for all studied processes except the Fenton treatment. The application of schemes with ozone demonstrated low pseudo-first order rate constants within the range of 10−4 s−1. Addition of UV radiation to the processes improved the removal of propoxycarbazone-sodium and increased the pseudo-first order rate constants to 10−3 s−1. The Fenton process was the most efficient and resulted in 5 and 60 s of half-life and 90% conversion time of propoxycarbazone-sodium, respectively, at 14 mM H2O2 concentration. UV treatment and the Fenton process may be recommended for practical application in decontamination of water or wastewater.

scholarly journals The effect of operational parameters on decolourisation of textile dyes and comparison efficiencies of the UV/H2O2, fenton and photo-fenton processes: A review

2017 ◽  
Vol 15 (1) ◽  
pp. 23-34
Author(s):  
Slobodan Najdanovic ◽  
Jelena Mitrovic ◽  
Aleksandra Zarubica ◽  
Aleksandar Bojic
Keyword(s):  
Advanced Oxidation Processes ◽  
Current Knowledge ◽  
Advanced Oxidation ◽  
Review Article ◽  
Textile Dyes ◽  
H2o2 Concentration ◽  
Fenton Process ◽  
Operational Parameters ◽  
Oxidation Processes ◽  
Initial Ph

In this review article, we summarize the current knowledge about the applicability of advanced oxidation processes (AOPs) such as UV/H2O2, Fenton and photo-Fenton for removal of textile dyes from wastewater and the effect of operational parameters (initial dye concentration, initial H2O2 concentration, initial Fe2+ concentration and initial pH) on these processes. Numerous studies have reported the use of AOPs for degradation of textile dyes, and the results show that they are very effective. By comparing the results of the previous studies, it seems that the photo- Fenton process is more efficient than the Fenton and UV/H2O2 process.

Advanced oxidation technologies for the degradation of pesticides in ground water and surface water

2002 ◽  
Vol 2 (1) ◽  
pp. 129-138 ◽  
Author(s):  
G.F. Ijpelaar ◽  
M. Groenendijk ◽  
R. Hopman ◽  
Joop C. Kruithof
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Surface Water ◽  
Advanced Oxidation Processes ◽  
Nitrate Concentration ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Practical Application ◽  
Oxidation Processes ◽  
By Products

An overview of the Advanced Oxidation Processes (AOP) studied for the degradation of pesticides combined with the formation of by-products is presented. It was found that the degree of conversion of pesticides is about the same with the Fenton process and UV/H2O2 within the margin of practical application, but slightly different with ozone/H2O2. Bentazone is readily degraded by the latter process, but more persistent during water treatment with the Fenton process and UV/H2O2, whilst atrazine is difficult to convert with all of these processes. Although bromate formation cannot be avoided completely with ozone/H2O2, it can be realized with the Fenton process and UV/H2O2. Upon degradation of pesticides with UV/H2O2 nitrite is produced, the amount depending on the water quality with respect to the nitrate concentration. Based on the a-selective nature of the hydroxyl radical AOC is formed out of DOC, which indicates that ozone/H2O2, the Fenton process as well as UV/H2O2 should be applicable for the development of biological GAC filtration.

scholarly journals Comparison of advanced oxidation processes for degrading Ponceau S dye. Application of photo-Fenton process.

2019 ◽  
Vol 38 (2) ◽  
pp. 197 ◽  
Author(s):  
Yasmine Laftani ◽  
Abdelghani Boussaoud ◽  
Baylassane Chatib ◽  
Mohammed El Makhfouk ◽  
Mohsine Hachkar ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Advanced Oxidation Processes ◽  
Dye Degradation ◽  
Degradation Kinetics ◽  
Reference Conditions ◽  
Inorganic Ions ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Oxidation Processes ◽  
Ponceau S

The major part of this work is devoted to the examination of the degradation of Ponceau S (PS) in aqueous medium by using the photo-Fenton process. The influence of pH of the medium, oxidant dose (H2O2), ferrous ion dose and the presence of inorganic ions such as bicarbonate, sulphate and nitrate on degradation kinetics was also analyzed. Before that, the efficiency of this process was compared to three other advanced oxidation processes (AOPs) such as H2O2/UV, Fenton (Fe2+/H2O2), and solar photo-Fenton. It was found that all dye degradation kinetics obeyed a pseudo-first order, and their apparent rate constants were represented by the ratios: kapp (H2O2/UV/Fe2+) =0.295 kapp (sunlight/Fe2+/H2O2) =0.141 kapp (Fe2+/H2O2) = 0.111 kapp (H2O2/UV) =0.031.Under reference conditions (0.06 mM of PS in ultrapure water), photo-Fenton oxidation using 0.06 mM of Fe2+, 1mM of H2O2 and the pH optimal value of 3 yielded more than 94.3% in only10 min of dye degradation with an apparent rate constant of 0.2951 min-1. Elsewhere, the addition of the salts in aqueous medium has, in general, an inhibition effect on the decolorization kinetics due to controlled ionic interactions of metals with inorganic ions. The most adverse effect on PS disappearance rate was observed when bicarbonate ions were present in the treated medium.

Advanced oxidation processes with coke plant wastewater treatment

2014 ◽  
Vol 69 (9) ◽  
pp. 1875-1878 ◽  
Author(s):  
A. Krzywicka ◽  
A. Kwarciak-Kozłowska
Keyword(s):  
Wastewater Treatment ◽  
Fenton Reaction ◽  
Advanced Oxidation Processes ◽  
Coke Plant ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Oxidation Processes ◽  
Coke Wastewater ◽  
Removal Of Impurities ◽  
Coke Plant Wastewater

The aim of this study was to determine the most efficient method of coke wastewater treatment. This research examined two processes – advanced oxidation with Fenton and photo-Fenton reaction. It was observed that the use of ultraviolet radiation with Fenton process had a better result in removal of impurities.

scholarly journals Recent Developments in Homogeneous Advanced Oxidation Processes for Water and Wastewater Treatment

2014 ◽  
Vol 2014 ◽  
pp. 1-21 ◽  
Author(s):  
M. Muruganandham ◽  
R. P. S. Suri ◽  
Sh. Jafari ◽  
M. Sillanpää ◽  
Gang-Juan Lee ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Process Efficiency ◽  
Solution Ph ◽  
Water And Wastewater Treatment ◽  
Experimental Conditions ◽  
Oxidation Processes ◽  
Oxidant Concentration ◽  
Recent Developments ◽  
Water And Wastewater

This paper reports on recent developments in homogeneous Advanced Oxidation Processes (AOPs) for the treatment of water and wastewater. It has already been established that AOPs are very efficient compared to conventional treatment methods for degradation and mineralization of recalcitrant pollutants present in water and wastewater. AOPs generate a powerful oxidizing agent, hydroxyl radical, which can react with most of the pollutants present in wastewater. Therefore, it is important to discuss recent developments in AOPs. The homogeneous AOPs such as O3, UV/O3, UV/O3/H2O2, and UV/H2O2, Fe2+/H2O2, UV/Fe2+/H2O2on the degradation of pollutants are discussed in this paper. The influence on the process efficiency of various experimental parameters such as solution pH, temperature, oxidant concentration, and the dosage of the light source is discussed. A list of contaminants used for degradation by various AOPs and the experimental conditions used for the treatment are discussed in detail.

Pillared clays as catalysts for methyl parathion removal by advanced oxidation processes

2015 ◽  
Vol 5 (2) ◽  
pp. 1052-1064 ◽  
Author(s):  
Salim Kouraichi ◽  
Mohamed El-Hadi Samar ◽  
Mostefa Abbessi ◽  
Hassane Boudouh ◽  
Adel Balaska
Keyword(s):  
Advanced Oxidation Processes ◽  
Methyl Parathion ◽  
Advanced Oxidation ◽  
Pillared Clays ◽  
Fenton Process ◽  
Oxidation Processes

Mineralisation of methyl parathion by the advanced Fenton process.

scholarly journals Degradation of red 5B and reactive blue 5G dyes in synthetic textile dye effluent by photo-fenton process

2018 ◽  
Vol 43 (1SI) ◽  
pp. 62
Author(s):  
Leandro Finger ◽  
Poliana Paula Quitaiski ◽  
Juliana Bortoli Rodrigues Mees ◽  
Ismael Laurindo Costa Junior
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Textile Dye ◽  
Fenton Process ◽  
Oxidation Processes ◽  
First Order ◽  
Textile Dye Effluent ◽  
Synthetic Solution ◽  
Percentage Removal ◽  
Dyes Removal

Effluents from textile industries are difficult to treat because they are loaded with non-biodegradable dyes. In this context, the Advanced Oxidation Processes (AOPs) are presented as alternatives to be studied for the treatment of these effluents. The objective of this work was to evaluate the efficiency of the removal of red 4B and 5G blue dyes in synthetic solution by means of the advanced oxidation Photo-Fenton. The best pH for removal of Red 4B was pH 3 and for Blue 5G dye was pH 1.6. The obtained results report a good removal when using H2O2 and Fe2+. With a H2O2 concentration of 66.80 mg L-1, Fe2+ of 9.66 mg.L-1 and pH 5.81 with a predicted percentage removal of 100.01% for Red 4B dye. And for Blue Reactive 5G dye a concentration of H2O2 of 55,04 mg L-1, Fe2+ of 10.34 mg L-1 and pH 2.59 with an expected percentage removal of 100,56%. The kinetics was that pseudo-first order with k1 of 0,597 min-1 and t1/2 of 1,16 min for red 4B and k1 of 0,150 min-1 and t1/2 of 4,60 for blue 5G. The results indicate the application of photo-fenton  as promising for the dyes removal in aqueous solutions.

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