Ciprofloxacin degradation from aqueous solution by Fenton oxidation: reaction kinetics and degradation mechanisms

Giri, Ardhendu Sekhar; Golder, Animes Kumar

doi:10.1039/c3ra45709e

Cited by 94 publications

(33 citation statements)

References 27 publications

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“…The pseudo-first order k well matched with the present work for the degradation of ethyl orange dye using TiO 2 (99.9% anatase) and a high pressure mercury lamp under aerobic condition [39]. They found that k varied from 1.1 × 10 −3 to 7.8 × 10 −3 min −1 at various pHs (2)(3)(4)(5)(6)(7)(8)(9)(10)(11).…”

Section: Kinetics Of Phenol Decompositionsupporting

confidence: 84%

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Fabrication and characterization of Ag-doped titania: impact of dye-sensitization, phenol decomposition kinetics and biodegradability index

Behera

Rao

Das

et al. 2016

Desalination and Water Treatment

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A B S T R A C THeterogeneous photocatalytic wastewater treatment using TiO 2 is a well-accepted technique under UV light illumination. Different strategies are employed to modify TiO 2 for shifting its photo-response to the visible light. In this work, Ag-doped TiO 2 nano-composites were synthesized by UV photo-reduction method to narrow down the band gap energy. Further, dye sensitization was performed using Eosin Yellowish to find out its influence on phenol decomposition. Synthesized catalysts were characterized using diffuse UV-vis spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy (TEM), Brunner Emmer Teller (BET) area and zeta-potential measurements. Nanowire like structure was observed with 30-70 nm in diameter from TEM images. BET surface area was decreased considerably with Ag-doping (maximum 31.6%) and dye sensitization (40.6%). Ag concentration and solution pH showed dramatic impact on phenol decomposition with maximum 87% at pH 7, Ag-loading 1% (w/w) and catalyst dose 0.5 g L −1 . Practically no positive synergy was noted with dye sensitization even though the photo-responses were moved intensely to the visible region. The pseudo-first order kinetic exhibited sound agreement to the experimental results with correlation coefficient ≥0.98. Moreover, the enhancement of biodegradability is investigated in terms of biochemical to chemical oxygen demand.

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Section: Kinetics Of Phenol Decompositionsupporting

confidence: 84%

“…In heterogeneous photo-catalytic processes, light energy is employed to excite semiconductor materials, used as photo-catalyst, to produce electron/hole (e − /h + ) pair [10,11]. The most common photo-catalyst is titania (TiO 2 ) for water decontamination studies [9].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of Ag-doped titania: impact of dye-sensitization, phenol decomposition kinetics and biodegradability index

Behera

Rao

Das

et al. 2016

Desalination and Water Treatment

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“…Previous studies regarding CIP removals employ different methods. For instant, CIP is effectively mineralized by using the Fenton oxidation [42,43] or a biochemical process using Basidiomycetes [44]. Photo-degradation of CIP was reported using titania nanopowders [45] or graphene oxide-BiVO 4 composite [46].…”

Section: Resultsmentioning

confidence: 99%

Visible-light-driven catalytic degradation of ciprofloxacin on metal (Fe, Co, Ni) doped titanate nanotubes synthesized by one-pot approach

Guan

Hoang

et al. 2015

J Mater Sci: Mater Electron

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In this work, Fe-series (Fe, Co, Ni) doped titanate nanotubes were synthesized via a simple, one pot hydrothermal process using commercial TiO 2 powder as the precursor. The samples were characterized by X-ray diffraction, nitrogen adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy, and UV-Vis. SEM and TEM results show that regularly uniform nanotubes were obtained and they possess homogeneous tubular structures with open ends. There is no significantly morphological and structural difference between TiNTs and Fe-series doped TiNTs. Furthermore, the photocatalytic properties of TiNTs and Fe-series doped TiNTs were studied using the degradation of ciprofloxacin. Fe-series doped TiNTs exhibit higher catalytic activities than those of TiNTs and commercial TiO 2 .

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“…Figure shows quantitative recoveries (>95%) are obtained at pH = 9, and then they begin to decline. pH is a key factor in the production rate of hydroxyl radicals; in addition, initial pH of the solution controls the protonation of the functional groups on the adsorbent (catalyst) surface and degree of ionization of the adsorbate and has an important impact on the surface charge of the adsorbent . The effect of initial pH on the photocatalytic degradation of pollutants is contingent upon the pollutant type and the zero point charge of the photocatalyst…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic degradation of norfloxacin and its intermediate degradation products using nitrogen‐doped activated carbon–CuS nanocomposite assisted by visible irradiation

Nekouei

2018

Applied Organom Chemis

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We have synthesized a nitrogen‐doped activated carbon (NAC) derived from oak using KOH and N2 thermal treatment at 400 °C as well as CuS nanoparticles. The NAC was decorated with the synthesized CuS to apply as a photocatalyst for degradation of norfloxacin (NOR). Before its application for photodegradation, the adsorbent/photocatalyst structural properties were investigated using X‐ray diffraction, X‐ray photoelectron spectroscopy, Raman spectroscopy and scanning electron microscopy. The photocatalytic degradation of NOR was successfully done under visible light using NAC–CuS. The results revealed that the investigated fluoroquinolone degraded very efficiently and pseudo‐first‐order kinetics was adopted for the photodegradation process. In addition, isothermal studies showed that the adsorption process in darkness followed the Langmuir model. The degradation characteristics of the NAC–CuS photocatalyst were studied for 120 min and 15 h under visible light for degradation of NOR, exhibiting a good efficiency for NOR removal. During 120 min of degradation, some intermediate degradation products that can be considered as secondary pollutants were produced. Then, to degrade these pollutants the radiation time was increased up to 15 h. The results displayed a perfect degradation of NOR and its secondary pollutants. The effective variables including pH, degradation time and photocatalyst dosage were optimized and studied in a multivariate method using Design Expert 7. Determination of photodegradation products was carried out using liquid chromatography–mass spectrometry. The results are of significance for estimating the environmental fate of NOR in aqueous media.

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Ciprofloxacin degradation from aqueous solution by Fenton oxidation: reaction kinetics and degradation mechanisms

Cited by 94 publications

References 27 publications

Fabrication and characterization of Ag-doped titania: impact of dye-sensitization, phenol decomposition kinetics and biodegradability index

Fabrication and characterization of Ag-doped titania: impact of dye-sensitization, phenol decomposition kinetics and biodegradability index

Visible-light-driven catalytic degradation of ciprofloxacin on metal (Fe, Co, Ni) doped titanate nanotubes synthesized by one-pot approach

Photocatalytic degradation of norfloxacin and its intermediate degradation products using nitrogen‐doped activated carbon–CuS nanocomposite assisted by visible irradiation

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