A comparison of Al-Fe and Zr-Fe pillared clays for catalytic wet peroxide oxidation

Molina, C.B.; Casas, José A.; Zazo, Juan A.; Rodrı́guez, Juan J.

doi:10.1016/j.cej.2006.01.007

Cited by 104 publications

(50 citation statements)

References 20 publications

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“…The use of PILCs in AOPs as a catalyst that helps in the degradation of organic contaminants has been frequently reported in the literatures (Sze Nga Sum et al 2004, Li et al 2006, Molina et al 2006, Ayodele et al 2012, Galeano et al 2014. The most frequently used polymeric compounds as pillaring agents are Al, Ti, Cr, and Fe (Bouras et al 2002, Dvininov et al 2009, Banković et al 2012, Sahel et al 2014.…”

Section: Pillared Clay-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

218

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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: Pillared Clay-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

218

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“…62 It has been demonstrated that these compounds are resistant under the usual mild operating conditions of Fenton oxidation. 2,28,40,44 In addition to those basic studies, the process has been applied to industrial wastewaters (such as chemical, pharmaceutical, textile, paper pulp, cosmetic, cork processing wastewaters, etc. ), sludge and contamined soils 63 -68 with the result of significant reductions of toxicity, improvement of biodegradability, colour and odour removal.…”

Section: Application Of Fenton Oxidation To Industrial Wastewatersmentioning

confidence: 99%

An overview of the application of Fenton oxidation to industrial wastewaters treatment

Bautista

Mohedano

Casas

et al. 2008

J of Chemical Tech & Biotech

588

286

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This review provides updated information on the application of the Fenton process as an advanced oxidation method for the treatment of industrial wastewaters. This technology has been used in recent decades as a chemical oxidation process addressed to meet a variety of objectives including final polishing, reduction of high percentages of organic load in terms of chemical oxygen demand or total organic carbon and removal of recalcitrant and toxic pollutants thus allowing for further conventional biological treatment. The efficiency and flexibility of this technology has been proven with a wide diversity of effluents from chemical and other related industries or activities, including pharmaceutical, pulp and paper, textile, food, cork processing, and landfilling among others.

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“…In addition, heterogeneous catalysts are easily recovered, regenerated, and reused. Therefore, in CWPO processes, active iron species over various supports, such as amorphous silica (Melero et al 2004), zeolite (Ovejero et al 2001), hexagonal mesostructured materials MCM-41 (Chaliha and Bhattacharyya 2008), HMS (Crowther 2003), SBA-15 (Calleja et al 2005;Shukla et al 2010), pillared clays (Guélou et al 2003;Guo and Al-Dahhan 2003;Molina et al 2006), and aluminum oxide , have been studied. However, it is important to note that most of the wastewater treatment processes are performed in a discontinuous slurry tank reactor, and a continuous process operated in a fixed-bed reactor (Martínez et al 2007) is rare.…”

Section: Introductionmentioning

confidence: 99%

Continuous Treatment of Phenol over an Fe2O3/γ-Al2O3 Catalyst in a Fixed-Bed Reactor

Yao

Gao

et al. 2015

Water Air Soil Pollut

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Fe 2 O 3 /γ-Al 2 O 3 catalysts were prepared using the wet impregnation method and characterized by Xray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen adsorption-desorption. The continuous catalytic wet hydrogen peroxide oxidation of an aqueous phenol solution over Fe 2 O 3 /γ-Al 2 O 3 was studied in a fixedbed reactor. The effects of several factors, such as the weight hourly space velocity (WHSV), particle size, reaction temperature, H 2 O 2 concentration, and initial pH, were studied to optimize the operation conditions for phenol mineralization. For a 1 g L −1 phenolic aqueous solution, the phenol was nearly completely removed and chemical oxygen demand (COD) removal was approximately 92 % at steady-state conditions with a WHSV of 2.4×10 −2 g PhOH h −1 g cat −1 at 80°C with 5.1 g L −1 H 2 O 2 . The long-term stability of the Fe 2 O 3 / γ-Al 2 O 3 catalyst was also investigated for the continuous treatment of phenolic water. The removal of phenol and COD exhibited a slowly decreasing trend, which was primarily due to the complexation of active sites with acid organic compounds and the adsorption of intermediate products. The deposition of organic carbon and Fe leached from the catalyst had a small role in the partial deactivation of the catalyst. The Fe leached from the catalyst partially contributed to the phenol removal during a short run. However, this contribution could be neglected after 36 h because the Fe leached from the catalyst decreased to approximately 5 mg L −1 .

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A comparison of Al-Fe and Zr-Fe pillared clays for catalytic wet peroxide oxidation

Cited by 104 publications

References 20 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

An overview of the application of Fenton oxidation to industrial wastewaters treatment

Continuous Treatment of Phenol over an Fe2O3/γ-Al2O3 Catalyst in a Fixed-Bed Reactor

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