Comparative evaluation of BiOCl–NPls–AC composite performance for methylene blue dye removal from solution in the presence/absence of UV irradiation: Kinetic and isotherm studies

Nekouei, Farzin; Nekouei, Shahram

doi:10.1016/j.jallcom.2017.01.157

Cited by 39 publications

(10 citation statements)

References 85 publications

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“…Similarly, Talaiekhozani et al reported that increasing pH leads to an increase in the removal of hydrogen sulfide and COD in domestic wastewater by UV radiation (28). As reported by Nekouei and Nekouei, the highest removal of dye (methylene blue) was 98.88% at pH 6 under UV light (29). It has been reported that the dye removal from wastewater is higher at a pH greater than 7 using UV radiation (30,31).…”

Section: Resultsmentioning

confidence: 80%

Comparison of Reactive Blue 203 Dye Removal Using Ultraviolet Irradiation, Ferrate (VI) Oxidation Process and MgO Nanoparticles

Talaiekhozani

Torkan²,

Banisharif

et al. 2018

Avicenna J Environ Health Eng

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This study investigated the effect of various parameters on the removal of Reactive Blue 203 dye from wastewater using ferrate(VI) oxidation process, ultraviolet radiation (UV) radiation and MgO nanoparticles under batch mode. Although several studies have been carried out on dye removal, there is no study on the removal of Reactive Blue 203 dye using ferrate(VI) oxidation process, UV radiation, and MgO nanoparticles. Therefore, the aim of this study is to investigate the effect of different factors including pH, temperature, contact time, the intensity of UV radiation and the concentration of MgO nanoparticles on Reactive Blue 203 dye removal using the above-mentioned methods. The results showed that the best pH values for dye removal using UV radiation, ferrate(VI), and MgO nanoparticles were 13, 1 and 13, respectively. The best temperature for Reactive Blue 203 dye removal using ferrate(VI) was 50°C. Hence, temperature variation had no significant effect on Reactive Blue 203 dye removal using UV irradiation and absorption by MgO nanoparticles. Based on the results, the best contact time was 15 minutes using UV radiation. The removal of Reactive Blue 203 dye using ferrate(VI) oxidation process was a quick reaction, and in a fraction of a second, the reactions were completed. The results showed that dye removal using MgO nanoparticles could be described by the Temkin isotherm. Therefore, the contact time was not considered as an effective parameter. In addition, the maximum dye removals were 95, 85 and 94% using UV irradiation, ferrate(VI) and MgO nanoparticles.

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Section: Resultsmentioning

confidence: 80%

Comparison of Reactive Blue 203 Dye Removal Using Ultraviolet Irradiation, Ferrate (VI) Oxidation Process and MgO Nanoparticles

Talaiekhozani

Torkan²,

Banisharif

et al. 2018

Avicenna J Environ Health Eng

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“…[2] There are various modalities for water treatment including photodegradation, cloud point extraction, advanced oxidation and adsorption. [3][4][5][6][7][8][9][10][11][12] Adsorption is the most popular method, but it should be noted that it is simply a transferral process of organic compounds from water to sorbents. Thus, it makes secondary pollution, and after the saturation stage the sorbents become inactive.…”

Section: Introductionmentioning

confidence: 99%

“…The hydroxyl radicals formed are the principal agents for the oxidation of NOR to transform it into by-products at optimum time and finally to simple non-polluting compounds at longer time. [1,2] In recent times, the striking degradation of antibiotics has been achieved from brown-rot fungi degradation, [15] photodegradation [5,7,[16][17][18] and biotransformation. [19] Photocatalytic depollution of water is regarded as an interesting bio-friendly modality for removal of such organic pollutants, which if undertaken with visible irradiation would provide an inexpensive technique for water treatment.…”

Section: Introductionmentioning

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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“…In addition, it enhances mass transfer rates causing more effective photodegradation Whereas after irradiation both organic pollutants and ZnO are hydrophobic, adding AC will take the CIP molecules nearer to the ZnO active sites to have a more efficient photodegradation process AC increases the catalytic efficiency of the ZnO in secondary degradation process of intermediates in situ. AC Allows a quick and simple reuse of ZnO by acting as a simple filtering agent for recovery from the slurry …”

Section: Introductionmentioning

confidence: 99%

“…Thus, designing the methods that are able to remove the residual compounds can be obligatory. [2] In recent years, the striking degradation of these antibiotics is acquirable from brown-rot fungi degradation, [3] physicochemical oxidation processes, [4,5] photodegradation [6][7][8][9][10][11][12][13][14] and biotransformation. [15] zinc oxide (ZnO) has attracted very much extent of consideration in materials research due to its multi-purpose properties, easiness in preparation, low price, stability, and favorable band gap energy.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO photocatalyst modified with activated carbon for a perfect degradation of ciprofloxacin and its secondary pollutants

Nekouei

Kargarzadeh

2017

Applied Organom Chemis

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The proposed research, presents the synthesis, characterization, and photocatalytic accomplishment of ZnO nanoplate (ZnOs) modified with activated carbon derived from Konar bark. The obtained nanocomposite (photocatalyst) was characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD), Raman spectroscopy, X‐ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET). First, the ZnO photocatalyst and activated carbon (AC) were prepared separately; then, the ZnO photocatalyst was modified with activated carbon. Various parameters namely pH, degradation time, and photocatalyst dose were optimized and studied in multivariate method by design expert7 software. The synergic efficiency of ZnO‐AC (adsorbent/photocatalyst) exhibited a good rate of ciprofloxacin (CIP) removal under visible irradiation. In addition, first pseudo order kinetic and isotherms equations were calculated. Moreover, the identification of degradation products was performed by ultra performance liquid chromatography‐tandem mass spectrometer (UPLC‐MS/MS). It is for the first time that a ZnO photocatalyst modified with activated carbon (ZnO‐AC) applied for CIP degradation.

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Comparative evaluation of BiOCl–NPls–AC composite performance for methylene blue dye removal from solution in the presence/absence of UV irradiation: Kinetic and isotherm studies

Cited by 39 publications

References 85 publications

Comparison of Reactive Blue 203 Dye Removal Using Ultraviolet Irradiation, Ferrate (VI) Oxidation Process and MgO Nanoparticles

Comparison of Reactive Blue 203 Dye Removal Using Ultraviolet Irradiation, Ferrate (VI) Oxidation Process and MgO Nanoparticles

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

Synthesis of ZnO photocatalyst modified with activated carbon for a perfect degradation of ciprofloxacin and its secondary pollutants

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