Wet oxidative method for removal of 2,4,6-trichlorophenol in water using Fe(III), Co(II), Ni(II) supported MCM41 catalysts

Chaliha, Suranjana; Bhattacharyya, Krishna G.

doi:10.1016/j.jhazmat.2007.05.039

Cited by 51 publications

(24 citation statements)

References 22 publications

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“…However, at doses of 40 and 80 mmol H 2 O 2 , almost complete color removal was achieved after 45 min of reaction time. Similar result has been reported by Chaliha and Bhattocharyya [16] in the wet oxidative removal of 2,4,6-tricholorophenol in water using Fe (III), Co (II), Ni (II) supported MCM41 catalysts. This could be explained by different by-products coming from the partial oxidation of the dye.…”

Section: The Influence Of Ph On Catalytic Oxidationsupporting

confidence: 90%

“…Iron and copper containing zeolites show redox properties because these metals can change their oxidation states [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Recently, high catalytic activity of iron containing zeolites for phenol oxidation [15,16] and for degradation of dyes [2,3] has been reported. Supported Fe-saponite clay catalysts revealed to be quite active in the Fenton-like oxidation of Orange II [4].…”

Section: Introductionmentioning

confidence: 99%

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Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

Dükkancı

Gündüz

Yılmaz

et al. 2010

Journal of Hazardous Materials

168

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a b s t r a c tIn this study, heterogeneous Fenton-like degradation of reactive azo dye Rhodamine 6G in water was investigated over a CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis. At initial pH of 3.4, a color removal of 100% was achieved after a reaction time of 45 min. TOC elimination was measured to be 51.8% after 2 h of oxidation. Initial decolorization rate was described by an equation of −r A0 = 4.56 × 10 2 e −24.83/RT C R6G,0 C 0.35 H 2 O 2 ,0 where R is in kJ/mol. The leaching of iron and copper cations from zeolite structure into the solution during oxidation was dependent on pH strongly. The regulation of pH from 6.5 (dye solution pH) to 3.4, increased leaching for iron from 0.7 to 0.8 mg/dm 3 and for copper from 1.4 to 2.1 mg/dm 3 . The copper was totally leached from the catalyst during the process at pH 3.4.

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Section: The Influence Of Ph On Catalytic Oxidationsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

Dükkancı

Gündüz

Yılmaz

et al. 2010

Journal of Hazardous Materials

168

View full text Add to dashboard Cite

show abstract

“…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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“…In this sense, the use of solid catalysts by immobilization of iron over a convenient support, the so-called Catalytic Wet Peroxide Oxidation (CWPO), offers a potential solution. So far, activated carbon [19,20], silica [21], mesostructured materials [22][23][24], zeolites [25,26], pillared clays [27][28][29][30] and alumina [31,32] have been used as supports to prepare the catalysts. Among them, the one based on alumina has proved to be an excellent highly-stable catalyst for CWPO not only with phenol but with real wastewaters from the cosmetic industry [31,32].…”

Section: Introductionmentioning

confidence: 99%

Improved wet peroxide oxidation strategies for the treatment of chlorophenols

Muñoz

Pedro

Casas

et al. 2013

Chemical Engineering Journal

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Wet oxidative method for removal of 2,4,6-trichlorophenol in water using Fe(III), Co(II), Ni(II) supported MCM41 catalysts

Cited by 51 publications

References 22 publications

Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

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

Improved wet peroxide oxidation strategies for the treatment of chlorophenols

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