Development and optimization of dark Fenton oxidation for the treatment of textile wastewaters with high organic load

Papadopoulos, A.; Fatta, D.; Loizidou, Maria

doi:10.1016/j.jhazmat.2007.04.083

Cited by 65 publications

(34 citation statements)

References 25 publications

(35 reference statements)

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“…This method is based on the generation of hydroxyl radicals (species with a very high oxidation potential -2.8V (Papadopoulos, 2007)) by the decomposition of hydrogen peroxide, in acidic conditions, catalyzed by ferrous ions (eq. 1), followed by the organics (including dyes) oxidation by such radicals, according to eq.…”

Section: Introductionmentioning

confidence: 99%

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

Rodrigues

Boaventura

Madeira

2014

IJEWM

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New strategies were herein applied for treating a cotton dyeing wastewater: coagulation/flocculation followed by Fenton's oxidation -Approach 1, Fenton process per se -Approach 2, and Fenton followed by coagulation/flocculation -Approach 3, aiming reducing chemicals consumption. Regarding the cost analysis, which is crucial for deciding on the best strategy to implement, it was found that in Approach 1 and Approach 2 the hydrogen peroxide has a major influence on the total costs as compared to ferrous ion. In Approach 3, the total costs are again mostly related to the consumption of reagents in the oxidation stage. The integration of the Fenton's process followed by coagulation/flocculation provided an effluent that meets the discharge limits, with global organic matter removals of 55.6% for COD, 42.7% for BOD and 70.4% for DOC, and almost complete color reduction (99.6%). However, the combined treatment of coagulation/flocculation followed by Fenton's oxidation exhibits also high overall efficiencies (61.7%, 25.8% and 71.2% for COD, BOD5 and DOC removal, respectively, with almost complete decolorization) but simultaneously smaller operating costs associated with chemicals consumption (0.82 €/m 3 ), putting into evidence the usefulness of the novel strategy implemented: use of the residual dissolved iron employed as coagulant in the first stage as catalyst in the subsequent Fenton's oxidation.

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Section: Introductionmentioning

confidence: 99%

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

Rodrigues

Boaventura

Madeira

2014

IJEWM

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“…However, it must be mentioned that the COD test is based on the assumption that all the organic materials can be oxidized by a strong oxidizing agent under acidic conditions. However, the COD test has some restrictions as detailed by Papadopoulos et al (2007). Some aromatic compounds are not oxidized completely within the COD test procedure and thus, the oxygen demands obtained do not reflect the actual oxygen requirements for oxidation.…”

Section: Effect Of Independent Variables On Toc % Removalmentioning

confidence: 99%

Application of response surface methodology in process parameters optimization for phenol mineralization using Fentons peroxidation

Hasan¹,

Mohd²,

Daud³

2011

Afr. J. Biotechnol.

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Adverse effect of the highly biorecalcitrant compound phenol to the environment is well established and its concentrations in industrial effluents vary greatly from 2.8 to 6,800 mg/l depending on the source. Fenton process effectively mineralises to CO 2 and H 2 O but reported works consumed more reagents and require longer reaction times. Due to the strong interaction between the several predictor variables in the Fenton oxidation, response surface methodology was used to optimise the mineralization treatment. Efficient, faster and economical operating conditions for phenol removal were explored by investigating four parameters namely the concentration ratio of hydrogen peroxide to phenol - ((H 2 O ], respectively. The soluble iron content of the analysed supernatant was found to be below the 15 mg/l (the maximum limit allowable for total iron discharges required by common regulative subscribed). This indicated that, the Fenton reagents were utilised during the peroxidation reaction evident from the almost near consumption of all Fe 2+ introduced in about 85% of the samples, thus, negating the need for immobilising the Fe 2+ catalyst or its removal by post treatment. The work proves that the optimized Fenton process can be potentially used for treatment of any phenol containing wastewater.

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“…The main mechanism of AOPs process is use the special chemical reagents, physical factors to product Hydroxyl radical (OH•), highly reactive species generated in sufficient quantities by AOPs, Hydroxyl radical (OH•) have the ability to oxidize the majority of the organics present in the wastewater effluents [7,5]. Common AOPs involve Fenton, Fenton like processes, ozonation, and electrochemical oxidation, photolysis with H 2 O 2 and O 3 , and TiO 2 photocatalysis [8]. Fenton process involves application of iron salts and hydrogen peroxide to produce hydroxyl radicals.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Simafix Red Dye Decolorization by Using Advanced Oxidation Process: Photo-Fenton

Dinh¹

2018

JST

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This study investigated the Photo-Fenton process in textile wastewater treatment by using textile synthesis wastewater made of Symafix Red Dye solution. The aim of the study was to investegate the factors that influent to the photo-Fenton process such as contact time, pH, H 2 O 2 and Fe 2+ conectrations, and UVexposure in order to research the optimum values of this process.Treatment of textile wastewater was carried out at ambient temperature in a batch reactor. As a result, the second-order is suitable for the reaction of removing color by using Photo -Fenton processes. The removal efficiencies decreased when we increased the concentration of Fe 2+ from 7.162 mM to 14.162 mM. When we increased the H 2 O 2 concentration from 0.037 mM to 0.11mM, the removal efficiencies slightly decreased. The optimum value of pH is pH = 3. At the optimum of pH value and minimum the concentration of Fe 2+ and H 2 O 2 the removal efficiency could reach up to 95.82 %.

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Development and optimization of dark Fenton oxidation for the treatment of textile wastewaters with high organic load

Cited by 65 publications

References 25 publications

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

Application of response surface methodology in process parameters optimization for phenol mineralization using Fentons peroxidation

Optimization of Simafix Red Dye Decolorization by Using Advanced Oxidation Process: Photo-Fenton

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