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.

Comparison of three advanced oxidation processes for degradation of textile dyes

2000 ◽  
Vol 42 (5-6) ◽  
pp. 345-354 ◽  
Author(s):  
R. Aplin ◽  
T.D. Waite
Keyword(s):  
Reaction Mechanisms ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Textile Dyes ◽  
Textile Dye ◽  
Optimum Conditions ◽  
Oxidation Processes ◽  
Nacl Concentration ◽  
Initial Ph ◽  
Fenton's Process

This paper examines the use of three advanced oxidation processes in degrading the textile dye, Reactive Red 235. The dye was oxidised using ozonation, standard Fenton's reagent (Fe2+/H2O2) and a modified photo-Fenton's process (UV/Fe oxalate/H2O2) under a variety of conditions. The effects of initial dye concentration, initial pH and NaCl concentration were studied for each process. Each process was found to have different optimum conditions as determined by the underlying reaction mechanisms.

scholarly journals Comparison of ultraviolet radiation/hydrogen peroxide, Fenton and photo-Fenton processes for the decolorization of reactive dyes

2015 ◽  
Vol 69 (6) ◽  
pp. 657-665 ◽  
Author(s):  
Miljana Radovic ◽  
Jelena Mitrovic ◽  
Milos Kostic ◽  
Danijela Bojic ◽  
Milica Petrovic ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Reactive Dyes ◽  
H2o2 Concentration ◽  
Fenton Process ◽  
Optimum Conditions ◽  
Oxidation Processes ◽  
Reactive Blue 19 ◽  
Initial Ph ◽  
Commercially Important ◽  
Reactive Orange

The effectivness of UV/H2O2 process, Fenton and photo-Fenton process at decolorization of commercially important textile dyes Reactive Orange 4 (RO4) and Reactive Blue 19 (RB19) was evaluated. The effect of operational condition such as initial pH, initial H2O2 concentration, initial Fe2+ concentration and initial dye concentration on decolorization of RO4 and RB19 was studied. The photo-Fenton process is found to be more efficient than UV/H2O2 and Fenton process for decolorization of simulated dye bath effluent and solutions of the dyes in water alone under optimum conditions. In simulated dye bath the removal efficiency was slightly lower than for the solutions of the dyes in water alone for both dyes types. The results revealed that the tested advanced oxidation processes were very effective for decolorization of RO4 and RB19 in aqueous solution.

Degradation of chlorpyriphos in water by advanced oxidation processes

2010 ◽  
Vol 10 (1) ◽  
pp. 1-6 ◽  
Author(s):  
R. Murillo ◽  
J. Sarasa ◽  
M. Lanao ◽  
J. L. Ovelleiro
Keyword(s):  
Reaction Time ◽  
Light Source ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
The Other ◽  
Molar Ratio ◽  
Optimum Conditions ◽  
Oxidation Processes ◽  
Other Hand ◽  
Initial Ph

The degradation of chlorpyriphos by different advanced oxidation processes such as photo-Fenton, TiO2, TiO2/H2O2, O3 and O3/H2O2 was investigated. The photo-Fenton and TiO2 processes were optimized using a solar chamber as light source. The optimum dosages of the photo-Fenton treatment were: [H2O2]=0.01 M; [Fe3 + ]=10 mg l−1; initial pH = 3.5. With these optimum conditions total degradation was observed after 15 minutes of reaction time. The application of sunlight was also efficient as total degradation was achieved after 60 minutes. The optimum dosage using only TiO2 as catalyst was 1,000 mg l−1, obtaining the maximum degradation at 20 minutes of reaction time. On the other hand, the addition of 0.02 M of H2O2 to a lower dosage of TiO2 (10 mg l−1) provides the same degradation. The ozonation treatment achieved complete degradation at 30 minutes of reaction time. On the other hand, it was observed that the degradation was faster by adding H2O2 (H2O2/O3 molar ratio = 0.5). In this case, total degradation was observed after 20 minutes.

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.

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.

Sonochemical synthesis of mesoporous ZrFe2O5 and its application for degradation of recalcitrant pollutants

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53529-53542 ◽  
Author(s):  
Sankar Chakma ◽  
Vijayanand S. Moholkar
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Textile Dyes ◽  
Synthesis And Characterization ◽  
Sonochemical Synthesis ◽  
Oxidation Processes

In this paper, we have reported the sonochemical synthesis and characterization of zirconium ferrite (ZrFe2O5), and its use as a catalyst in advanced oxidation processes (AOPs) using decolorization/degradation of textile dyes as model processes.

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.

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