Fe-pillared clay as a Fenton-type heterogeneous catalyst for cinnamic acid degradation

Tabet, Djamel; Saïdi, Mohamed; Houari, Mohamed; Pichat, Pierre; Khalaf, Hussein

doi:10.1016/j.jenvman.2005.10.003

Cited by 56 publications

(30 citation statements)

References 17 publications

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“…The existence of optimum oxidant doses has also been reported in other works [30], putting into evidence the need of a careful design to optimize process efficiency.…”

Section: Effect Of the Initial H 2 O 2 Concentrationmentioning

confidence: 53%

“…Over 700,000 t of approximately 10,000 types of dyes and pigments are produced every year worldwide [27]. From this amount, about Fe-pillared montmorillonite [30] 20% are discharged without treatment [28]. So, the disposal of the large amounts of effluents from textile industry produces uncontrollable environmental hazards because they contain considerable color as well as appreciable quantities of organic compounds that are not easily eliminated by conventional wastewater treatment methods (particularly azo dyes due to their non-biodegradable nature or toxicity) [6,27,29].…”

Section: Pollutants Degraded or Wastewaters Treated With Pillared Clamentioning

confidence: 99%

“…So, the disposal of the large amounts of effluents from textile industry produces uncontrollable environmental hazards because they contain considerable color as well as appreciable quantities of organic compounds that are not easily eliminated by conventional wastewater treatment methods (particularly azo dyes due to their non-biodegradable nature or toxicity) [6,27,29]. Finally, cinnamic acids [30], which are simple aromatic compounds that result from olive cell wall degradation during oil extraction, were studied using Fe-pillared montmorillonite catalyst (see Table 6.1). These various aromatic acids are typically found in wastewaters of agricultural origin and represent a dangerous contamination.…”

Section: Pollutants Degraded or Wastewaters Treated With Pillared Clamentioning

confidence: 99%

“…100% conversion, t = 3 h 120 mg/l cinnamic acid, Fe-pillared montmorillonite catalyst [30] 4-Nitrophenol Fig. 6.2).…”

Section: Effect Of the Initial Phmentioning

confidence: 99%

“…In another study [30], using Fe-pillared clay as a Fenton-type heterogeneous catalyst for cinnamic acid degradation, the pH varied between 2.9 and 5.0. Figure 6.3 shows that a lower pH led to a higher removal, both in homogeneous and heterogeneous systems.…”

Section: Effect Of the Initial Phmentioning

confidence: 99%

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Use of Pillared Clay-Based Catalysts for Wastewater Treatment Through Fenton-Like Processes

Herney-Ramírez

Madeira

2010

Pillared Clays and Related Catalysts

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Clays, both natural and physical-chemically modified, are attractive materials for the preparation of supported catalysts. In this chapter, a review is made regarding the use of pillared interlayered clays (PILCs) in heterogeneous Fentonlike advanced oxidation processes. Their applications in pollutants degradation is summarized, with particular emphasis on the effect of the main operating conditions (e.g., initial H 2 O 2 or parent compound concentration, catalyst load, pH, or temperature) on oxidation efficiency. Special attention is also given to the type of catalyst or precursor used, to the importance and advantages of the heterogeneous versus homogeneous process, and to significant aspects like catalyst stability. Among the technological issues that are of concern, the importance of using continuous flow reactors (e.g., fixed-bed) is discussed. Finally, some mechanistic studies are reviewed as well as modeling works, based on phenomenological or semi-empiric models (e.g., using statistic tools like design of experiments).

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“…The existence of optimum oxidant doses has also been reported in other works [30], putting into evidence the need of a careful design to optimize process efficiency.…”

Section: Effect Of the Initial H 2 O 2 Concentrationmentioning

confidence: 53%

Section: Pollutants Degraded or Wastewaters Treated With Pillared Clamentioning

confidence: 99%

Section: Pollutants Degraded or Wastewaters Treated With Pillared Clamentioning

confidence: 99%

“…100% conversion, t = 3 h 120 mg/l cinnamic acid, Fe-pillared montmorillonite catalyst [30] 4-Nitrophenol Fig. 6.2).…”

Section: Effect Of the Initial Phmentioning

confidence: 99%

Section: Effect Of the Initial Phmentioning

confidence: 99%

See 3 more Smart Citations

Use of Pillared Clay-Based Catalysts for Wastewater Treatment Through Fenton-Like Processes

Herney-Ramírez

Madeira

2010

Pillared Clays and Related Catalysts

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Synthesis, Characterization, and Catalytic Activity of New Cu(II) Complexes of Schiff Base: Effective Catalysts for Decolorization of Acid Red 37 Dye Solution

Elsherbiny

El‐Ghamry

2015

Int J of Chemical Kinetics

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In this paper, three new Cu(II) Schiff base complexes with three different anions (acetate, chloride, and nitrate) were successfully synthesized and characterized by elemental analysis, mass spectra, molar conductance, FT‐IR, NMR,UV–vis spectroscopy, magnetic moment, ESR, and thermal analysis. The catalytic performances of these complexes in decolorization of azo dye, Acid Red 37, were evaluated. Copper(II) complexes were found to be an efficient catalyst for decolorization of Acid Red 37 in the presence of hydrogen peroxide. The catalytic investigation revealed that the Cu(II) complex with acetate anion (complex 1) performed the highest catalytic activity. The kinetics of the decolorization of AR37 with this catalyst was studied, and the observed rate constant was determined. The effects of different reaction parameters such as catalyst dosage, solution pH, initial concentration of H2O2, dye solution, and reaction temperature on the reaction rate constant were studied. The best reacting conditions should be catalyst dosage = 0.004 g, initial pH 4.0, [H2O2]0 = 0.8 M, and [AR37]0 = 1.16 M at temperature 25°C. Under these conditions, about 99% of AR37 was decolorized within 60 min. The results indicated that the Cu(II) complex with the acetate anion is a promising catalyst for wastewater treatment.

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Pillared Clay Catalysts in Green Oxidation Reactions

Vicente

Trujillano

Ciuffi

et al. 2010

Pillared Clays and Related Catalysts

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In this chapter, the use of pillared clays as catalysts in green oxidation reactions is considered. Several catalytic oxidation reactions have been selected, and special attention is given to the reaction products and to the yields achieved.Keywords PILC · Pillared clays · Green oxidation reactions · Catalysts IntroductionPillared InterLayered Clays (PILCs, in short) are prepared by exchanging the charge-compensating cations present in the interlamellar space of the clays with hydroxy-metal polycations. On calcination, the inserted polycations yield rigid, thermally stable oxide species, which prop the clay layers apart and prevent their collapse. The intercalation and pillaring processes produce the development of a porous structure with the presence of particular surface sites. These solids have been used in catalytic, purification, and sorption-based separation applications.The methods and the mathematical models used in the characterization of the porous structure of PILCs have been presented in a recent review [1]. From this study and all the references cited therein, it is clear that a great interest exists in the microporous structure of PILCs as well as in the effect of their structure on the applications of these materials. In summary, several researchers have suggested a bimodal micropore distribution for the microporous structure developed by the intercalated and the pillared clays, but this suggestion is open to questioning and can contribute to the expansion of this field in the coming years.Interest in the application of PILCs as catalysts has undergone a huge increase over the last few years [1,2]. One of the most studied subjects related to PILCs

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Fe-pillared clay as a Fenton-type heterogeneous catalyst for cinnamic acid degradation

Cited by 56 publications

References 17 publications

Use of Pillared Clay-Based Catalysts for Wastewater Treatment Through Fenton-Like Processes

Use of Pillared Clay-Based Catalysts for Wastewater Treatment Through Fenton-Like Processes

Synthesis, Characterization, and Catalytic Activity of New Cu(II) Complexes of Schiff Base: Effective Catalysts for Decolorization of Acid Red 37 Dye Solution

Pillared Clay Catalysts in Green Oxidation Reactions

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