Decolorization of synthetic dyes by the Fenton reagent and the Cu/pyridine/H2O2 system

Nerud, F.; Baldrián, Petr; Gabriel, Jiřı́; Ogbeifun, D. E.

doi:10.1016/s0045-6535(00)00482-3

Cited by 97 publications

(49 citation statements)

References 15 publications

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“…In addition, some research works have modified the aluminum pillared clays by doping the transition metals, such as Cr, Ag, V, Fe, Mn, Ti, Ce, Pd, Cu, etc., in order to create the active sites for the catalysis reactions [6][7]. Among various transition metals, the copper (Cu) have attracted considerable attention as the dopant because it could induce the catalytic oxidation via Fenton and photo-Fenton reactions [8], resulting in the degradation of various organic pollutants, such as synthetic dyes [9][10][11], phenol [12], olive oil mill [13], agro food [14], etc. Besides, the Cu dopant could also inhibit bacterial growth, indicating its antibacterial property [15][16].…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of copper impregnated aluminum pillared montmorillonite: nanoclays for wastewater treatment

Tepmatee

Siriphannon

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Copper impregnated aluminum pillared montmorillonites (Cu-iAlpill-MMTs) were prepared by adding Cu 2+ solution into dried aluminum polyohydroxy cation intercalated montmorillonite using various Cu 2+ concentrations, i.e. 4, 7, 10 and 13 wt% and then calcining at 500 o C. The Cu-iAlpill-MMTs possessed slit-liked mesopores with pore diameters of 3.3-3.8 nm and ~6-35 nm as observed from the nitrogen adsorption isotherms. The mesopore quantities of Cu-iAlpill-MMTs gradually decreased with the increase of impregnated Cu 2+ concentrations. The impregnated CuO occupied not only the interior interlayers, but also the exterior surfaces of Cu-iAlpill-MMTs. The Cu-iAlpill-MMTs with 10 and 13 wt% of impregnated Cu 2+ could inhibit the growth of Escherichia coli. The Cu-iAlpill-MMTs effectively acted as the heterogeneous catalyst for removal reactive orange 16 (RO16) in Fenton or photo-Fenton oxidation treatments. The higher impregnated Cu 2+ and/or the longer treatment time brought about the higher percentage of RO16 removal.Key words: pillared montmorillonite, mesoporous materials, impregnation, advanced oxidation processes, adsorption.Facile preparation of copper impregnated aluminum pillared montmorillonite: nanoclays for wastewater treatment lonite using facile impregnation method, in which the Cu doped amount was controllable. The Cu impregnation was performed using the aluminum polyhydroxy cation intercalated montmorillonite as the host substrate since the intercalated aluminum polyhydroxy cation could enlarge the interlayer space of montmorillonite, resulting in the increase of impregnated Cu uptake. In addition, the concentration of impregnated Cu was varied in order to investigate its effect on the structure and properties of the resultant products since the Cu quantity was considered to play an important role in the catalytic activity and antibacterial property.The catalytic oxidation activities of the as-prepared Cu impregnated aluminum pillared montmorillonites were investigated for removal reactive orange 16 (RO16). This reactive dye was used as a model dye containing wastewater because it was commonly used in textile industries due to its easy application in dyeing process and stability during usage [18]. However, the stability of reactive dyes resulted in the difficulty in elimination by biological and conventional wastewater treatments, therefore; the reactive dyes were important pollutants from the textile effluents. The as-prepared Cu impregnated aluminum pillared montmorillonites were considered to promote the decolourisation, degradation and mineralisation of reactive dye from the model wastewater.

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Section: Introductionmentioning

confidence: 99%

Facile preparation of copper impregnated aluminum pillared montmorillonite: nanoclays for wastewater treatment

Tepmatee

Siriphannon

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…The reported photocatalyst systems, to the best of our knowledge, can be generally classified as oxides (TiO 2 , ZnO, NiO) [9][10][11], sulfides (CdS, ZnS) [12,13], and halides (AgCl, AgBr) [14,15]. However, among these semiconductors, TiO 2 is considered as an excellent photocatalyst for hydrogen production due to its nontoxicity, stability, low price and resistance to chemicals and photochemical corrosion [16][17][18][19]. As a result, many reports concerning photocatalytic H 2 production over TiO 2 have been published [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…This is mainly due to the high band gap value (3.2 eV) of TiO 2 which selectively limits its absorption wavelength. Besides, the rapid recombination of photoexcited holes and electrons also restricts the production of hydrogen on pure TiO 2 [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

The enhanced photocatalytic activity of Zn2+ doped TiO2 for hydrogen generation under artificial sunlight irradiation prepared by sol–gel method

Wang

Yun

et al. 2014

J Sol-Gel Sci Technol

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Novel Zn 2? doped TiO 2 photocatalysts were synthesized by a simple sol-gel method. X-ray diffraction, UV-Vis diffuse reflectance spectroscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma optical emission spectrometry, Brunauer-EmmettTeller method and Photoluminescence spectra were employed to examine the phase structure, morphology and optical properties of the synthesized samples. Their photocatalytic activities were evaluated by spitting water under artificial sunlight irradiation. In contrast with pure TiO 2 , the Zn 2? -TiO 2 samples showed enhanced photocatalytic properties. When TiO 2 was doped with 1 wt% Zn 2? , it showed the optimal photocatalytic activity with the amount of hydrogen evolution of 180 lmol h -1 , which was as about seven times as that for pure TiO 2 . For the Zn 2? -TiO 2 , Zn 2? can improve the separation ratio of photoexcited electrons-holes and leads to the high photocatalytic activity of TiO 2 .

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“…Many modifications have been applied in order to increase the pH range. This has led to a great variety of ligated iron complexes in combination with hydrogen peroxide or even with other transition metals, such as Mn(II), Cu(II) and Co(II), for the wastewater treatment (Sun and Pignatello, 1993;Nerud et al, 2001;Salem, 2001;Verma et al, 2003;Gabriel et al, 2004). In these systems, the hydroxyl radicals are thought to play an important role in the degradation of the pollutants.…”

Section: Introductionmentioning

confidence: 99%

Dechlorination and destruction of 2,4,6-trichlorophenol and pentachlorophenol using hydrogen peroxide as the oxidant catalyzed by molybdate ions under basic condition

Tai

Jiang

2005

Chemosphere

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Decolorization of synthetic dyes by the Fenton reagent and the Cu/pyridine/H2O2 system

Cited by 97 publications

References 15 publications

Facile preparation of copper impregnated aluminum pillared montmorillonite: nanoclays for wastewater treatment

Facile preparation of copper impregnated aluminum pillared montmorillonite: nanoclays for wastewater treatment

The enhanced photocatalytic activity of Zn2+ doped TiO2 for hydrogen generation under artificial sunlight irradiation prepared by sol–gel method

Dechlorination and destruction of 2,4,6-trichlorophenol and pentachlorophenol using hydrogen peroxide as the oxidant catalyzed by molybdate ions under basic condition

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