Phenol degradation in water through a heterogeneous photo-Fenton process catalyzed by Fe-treated laponite

Abstract:The basic and applied aspects of Fenton and Fenton-like processes for removal of pollutants using zerovalent iron materials, including nanoparticles, are reviewed in this article. Only those examples including the use of the iron materials together with hydrogen peroxide addition are included. The mechanistic aspects of homogeneous and heterogeneous Fenton processes, still under discussion, are displayed. The use of biogenic generated iron nanoparticles for removal of pollutants is discussed due to their novelty and economy of synthesis.

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“…Also, the need of using high Fe 2+ concentrations (40-80 ppm) is an important disadvantage of the Fenton homogenous processes [40,41].…”

Section: Advantages and Disadvantages Of The Fenton Processesmentioning

confidence: 99%

An overview on heterogeneous Fenton and photoFenton reactions using zerovalent iron materials

Litter

Slodowicz

2017

Journal of Advanced Oxidation Technologies

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“…Some of the factors influencing the applicability of Fenton process for real industrial wastewater include high chemical consumption (up to 50-80 ppm of Fe ions in solution), pH dependence (effective in the range of pH 2-4), high cost of H 2 O 2 , generation of Fe sludge, necessity of post-treatment, necessity of neutralization of the treated sample before disposal, and decomposition of H 2 O 2 (Iurascu et al 2009, Babuponnusami and Muthukumar 2012, Ali et al 2013. Besides, the treatment of Fe ioncontaining sludge as the last wastewater treatment step is expensive and it requires a huge amount of chemicals and manpower.…”

Section: Homogeneous Fenton Processmentioning

confidence: 99%

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

Buthiyappan

Raman

Daud

2016

Reviews in Chemical Engineering

235

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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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“…The classic Fenton process (dissolved Fe(II) and H 2 O 2 ) [1] is capable of degrading organic pollutants into harmless chemicals such as CO 2 and H 2 O, but its application is limited by the narrow working pH range (<4) [2,3], separation and recovery of the iron species specially in industrial wastewater treatment [4]. For these reasons, the development of heterogeneous Fenton systems has received considerable interest and many heterogeneous Fenton-like catalysts have been reported, such as iron oxides [5][6][7][8], iron-immobilized zeolites [9], clays [10,11], and carbon materials [12]. Unlike the homogeneous systems, these solid catalysts could be recuperated by means of a simple separation operation and reused in next runs.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Fenton degradation of Rhodamine B over nanoscaled Cu-doped LaTiO3 perovskite

Zhang

Nie

et al. 2012

Applied Catalysis B: Environmental

188

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a b s t r a c tCu-doped LaTiO 3 perovskite was prepared with a sol-gel method and characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The introduction of Cu induced the formation of LaTiO 3 perovskite in which titanium existed as Ti 3+ , resulting in the coexistence of Ti 3+/4+ and Cu +/2+ in the perovskite structure. LaTi 0.4 Cu 0.6 O 3 showed highly Fenton activity and stability for the degradation of RhB with H 2 O 2 in the initial pH range of 4-9. Moreover, the catalyst buffered the solution with the tested initial pH to around 7 during the adsorption process. The studies of electron spin resonance, the effect of radical scavengers and other experiments verified that H 2 O 2 was predominately converted into

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Phenol degradation in water through a heterogeneous photo-Fenton process catalyzed by Fe-treated laponite

Cited by 214 publications

References 30 publications

An overview on heterogeneous Fenton and photoFenton reactions using zerovalent iron materials

An overview on heterogeneous Fenton and photoFenton reactions using zerovalent iron materials

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

Enhanced Fenton degradation of Rhodamine B over nanoscaled Cu-doped LaTiO3 perovskite

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