Heterogeneous photo-Fenton oxidation of reactive azo dye solutions using iron exchanged zeolite as a catalyst

Tekbaş, Mesut; Yatmaz, H. Cengiz; Bektaş, Nihal

doi:10.1016/j.micromeso.2008.03.001

Cited by 151 publications

(75 citation statements)

References 30 publications

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“…However, the cost associated with the processing of sludge and the narrow pH range of the treatment system has limited the application of homogeneous photo-Fenton systems for wastewater treatment (Pignatello et al 2006, De la Cruz et al 2012. Therefore, much attention has recently been paid to the development of heterogeneous catalysts to reuse catalysts and avoid the formation of metal-containing sludge that cause pollutions and requires post-treatment in photoFenton processes (Zhang et al 2007b, Tekbaş et al 2008, Chen et al 2009a). …”

Section: Homogeneous Photo-fenton Processmentioning

confidence: 99%

“…(Tekbaş et al 2008, Aleksić et al 2010, Navalon et al 2010, Gonzalez-Olmos et al 2012. Tekbaş et al (2008) investigated the efficiency of heterogeneous photo-Fenton oxidation of reactive azo dye solutions using Fe-exchanged zeolite catalyst in a quartz batch reactor using artificial UVA as a light source. According to their study, the maximum degradation of 90% was achieved in 60 min at 35°C, pH 5.2, 15 mm H 2 O 2 , and 1 g/l of catalyst loading.…”

Section: Zeolite-based Catalystsmentioning

confidence: 99%

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Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Buthiyappan

Raman

Daud

2016

Reviews in Chemical Engineering

236

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AbstractIn the past few years, there have been many researches on the use of different types of homogenous catalyst for the degradation of textile wastewater in conventional advanced oxidation processes (AOPs). However, homogenous AOPs suffer from few limitations, including large consumption of chemicals, acidic pH, high cost of hydrogen peroxide, generation of iron sludge, and necessity of post-treatment. Therefore, recently, there have been more researches that focus on improving the performance of conventional AOPs using heterogeneous catalysts such as titanium dioxide, nanomaterials, metal oxides, zeolite, hematite, goethite, magnetite, and activated carbon (AC). Besides, different supports such as AC that have been incorporated with transition metals and clays have been proven to have excellent catalytic activity in AOPs. This paper presents a comprehensive review of advances and prospects of catalytic AOPs for the decontamination of a wide range of synthetic and real textile wastewater. This review provides an up-to-date critical review of the information on the degradation of various textile dyes by a wide range of heterogeneous catalysts and adsorbents. The future challenges of AOPs, including chemical consumption, toxicity assessment, reactor design, and limitation of catalysts, are discussed in this paper. In addition, this paper also discusses the presence of ions, generation of by-products, and industrial applications of AOPs. Special emphasis is given to recent studies and large-scale combination of AOPs for wastewater treatment. This review paper concludes that more studies are needed for the kinetics, reactor design, and modeling of hybrid AOPs and the production of their corresponding intermediate products and secondary pollutants. A better economic model should also be developed to predict the cost of AOPs, as the treatment cost varies with dyes and textile effluents.

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Section: Homogeneous Photo-fenton Processmentioning

confidence: 99%

Section: Zeolite-based Catalystsmentioning

confidence: 99%

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Buthiyappan

Raman

Daud

2016

Reviews in Chemical Engineering

236

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“…This is probably because hydroxyl radicals were produced from H 2 O 2 with catalyst promoting and lower H 2 O 2 dosage was not adequate to produce enough hydroxyl radicals. Furthermore, higher H 2 O 2 concentration make hydroxyl radicals have more chance to react with each other, thereby reducing the concentration of them [14]. Figure 6 shows the influence of catalyst dosage on Acid scarlet 3R decolorization and COD removal.…”

Section: Effect Of H 2 O 2 Dosagementioning

confidence: 99%

Degradation of acid scarlet 3R with CuO/SiO₂hollow sphere catalyst

Xie

Zhong

Wang

et al. 2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Silica-supported copper catalyst materials have been synthesized via an incipient wetness impregnation. The resulting samples were characterized using X-ray diffraction (XRD) and Scanning electron microscope (SEM). The heterogeneous Fenton-like oxidation of reactive azo dye solutions by this catalyst was also investigated. The effects of various operating conditions on decolorization performance were evaluated, namely hydrogen peroxide dosage, initial pH, catalyst loading and initial dye concentration. The results indicated that by using 34 mmol/L of H 2 O 2 and 6.0 g L -1 of the catalyst at 60 o C, pH 3.5, 97% of decolorization efficiency was achieved within 90 min. CuO/SiO 2 hollow sphere is shown a promising catalyst for degradation of azo dye aqueous solution by Fenton-like processes.

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“…Therefore, generation of Fenton sludge in a heterogeneous Fenton system can be reduced to some extent. However, the catalytic activity is usually deteriorated after repetitive use due to the leaching of active iron or the decay of active catalytic sites, notably in acidic condition [10].…”

Section: Introductionmentioning

confidence: 99%

Reuse of Ferric Sludge by Ferrous Sulfide in the Fenton Process for Nonylphenol Ethoxylates Wastewater Treatment

Zhou¹,

Zhang²

2017

CWEEE

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In this paper, Fenton process was determined to be an effective technique to treat the refractory nonylphenol ethoxylates (NPEOs) wastewater. The chemical oxygen demand (COD) removal efficiencies above 89% were obtained when the initial COD concentration was 12,000 mg/L. However, a large amount of ferric sludge (SS = 8.724 g/L) would be produced after the Fenton oxidation of the wastewater and must be disposed appropriately. A novel process for Fenton sludge reused by low-cost ferrous sulfide (FeS) was also investigated. Experimental results show that the Fenton sludge could be reduced to produce a certain amount of Fe 2+ in the acidic mixed liquor byFeS. This mixed liquor from Fenton sludge could be used as the new catalyst in the Fenton process and was also highly effective for the NPEOs wastewater treatment. The residual FeS from the mixed liquor could be used for the next batch of the reaction.

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Heterogeneous photo-Fenton oxidation of reactive azo dye solutions using iron exchanged zeolite as a catalyst

Cited by 151 publications

References 30 publications

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Degradation of acid scarlet 3R with CuO/SiO₂hollow sphere catalyst

Reuse of Ferric Sludge by Ferrous Sulfide in the Fenton Process for Nonylphenol Ethoxylates Wastewater Treatment

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Heterogeneous photo-Fenton oxidation of reactive azo dye solutions using iron exchanged zeolite as a catalyst

Cited by 151 publications

References 30 publications

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Degradation of acid scarlet 3R with CuO/SiO2hollow sphere catalyst

Reuse of Ferric Sludge by Ferrous Sulfide in the Fenton Process for Nonylphenol Ethoxylates Wastewater Treatment

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Degradation of acid scarlet 3R with CuO/SiO₂hollow sphere catalyst