Treatment of Methyl Orange by Photocatalysis Floating Bed

Wang, Enqiang; Zheng, Qiaoli; Xu, Shaohui; Li, Dengxin

doi:10.1016/j.proenv.2011.09.181

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…Different buoyant or low-density substrate materials used for the development of floating photocatalysts have been reported such as cork, 4 expanded perlite, 9 hollow glass or flyash microspheres ,12 vermiculite, 13 quartz tubes, 14 quartz sand particles, 15 natural porous pumice, 16 expanded clay granules, 15 expanded graphite substrates, alginate beads, 17 and polymers 2,[18][19][20] etc. Among these substrates, the low cost, lipophilicity and low density of the polymer make it more attractive for the development of floating photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

“…3,[25][26][27][28][29][30][31][32][33][34] In recent times, some researchers have focused on the development of polymer-supported photocatalysts in the form of a film. 6,13,14 However, these researches are limited to very small reactor volumes (usually of the order of 50 mL, as shown in Table 1) and not much work is reported on the large-scale applications of photocatalytic polymer nanocomposite films for textile wastewater treatment. Thus, this work focuses on the degradation of Remazol Turquoise Blue (RTB, synthetic textile wastewater, since very few studies are done on photocatalytic degradation of this dye, see Table 2) in a batch reactor of two different volumes using a simple scale-up criteria.…”

Section: Introductionmentioning

confidence: 99%

“…In recent times, some researchers have focused on the development of polymer‐supported photocatalysts in the form of a film . However, these researches are limited to very small reactor volumes (usually of the order of 50 mL, as shown in Table ) and not much work is reported on the large‐scale applications of photocatalytic polymer nanocomposite films for textile wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

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Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Das

Mahalingam

2019

J of Chemical Tech & Biotech

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BACKGROUND: In the last decade, research on floating photocatalysts has increased rapidly with polymer substrates being a popular choice. However, most of the published work is on very small volumes and there is very little work on scale-up of such systems. RESULTS:Polystyrene-titanium dioxide nanocomposite floating films were prepared using a facile solvent casting method and tested for the photocatalytic degradation of four different dyes under UV irradiation. The prepared film was characterised by Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma optical emission spectrometry (ICP-OES) and profilometry. Scale-up studies were done in batch mode under optimised conditions, and for the larger reactor volume, the effect of recirculation was studied. Complete decolourisation of the model dye (Remazol Turquoise Blue) was observed within 80 min in the scaled-up batch process. In the recirculation mode, for a much larger volume of the dye solution, around 75% decolourisation in 6 h was observed. The reusability of the photocatalytic film was tested, and the results promise a minimum decolourisation efficiency of around 70%. Finally, total organic carbon (TOC) and liquid chromatography mass spectrometry (LC-MS) analysis were used to assess the degradation of the dye. The maximum TOC reduction observed was around 25% possibly due to the complex nature of the dye used in this study. The intermediate products of degradation were identified, and a tentative mechanism is suggested. CONCLUSION: This work demonstrates the recirculation aspects of the photocatalytic reactor under the scaled-up conditions for a complex dye. The prepared film showed excellent stability with satisfactory wastewater decontamination under UV irradiation even after repeated use. Figure 5. Effect of catalyst loading and pH. Conditions: 200 mL of 10 ppm Remazol Turquoise Blue (RTB) solution, catalyst loading: 12 wt%.wileyonlinelibrary.com/jctb

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Das

Mahalingam

2019

J of Chemical Tech & Biotech

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“…It moves slowly and frequently yields unexpected outcomes. Chemical approaches demand high chemical dosages and generate a lot of sludge [8][9][10][11]. Creating more efficient methods for destroying such pollutants is vital in these circumstances.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermally Synthesized Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanoparticles for Photocatalytic Degradation of Rhodamine B Dye

Saravanan

Sarathkumar

Sivakumar

2023

JNanoR

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Industrial dyes contained a wide range of organic compounds that could affect the environment and high dimensional challenges to humans. In recent years, the environmentally safe and inexpensive quaternary copper-based chalcogenide Cu2ZnSnS4 (CZTS) has emerged as a material for photovoltaics and photocatalysis. CZTS nanoparticles were prepared in this investigation using the hydrothermal route at 210 °C for 24 h without the addition of a surfactant or capping agents. Rhodamine B (RhB), a carcinogenic dye, was degraded using the synthesized material through a photocatalytic process. The structural, morphological, optical, and photocatalytic characteristics of CZTS nanoparticles were examined using X-ray diffraction (XRD), Raman spectroscopy, Field emission scanning electron microscopy (FE-SEM), and UV-vis spectroscopy. The average particle size of CZTS is found to be 31 nm with crystalline nature have been characterized by XRD. The results demonstrate that the synthesized sample has mixed morphological structures such as clew-like and flower-like structures and a bandgap of 1.50 eV. CZTS nanoparticles were used as photocatalysts under direct sunlight for Rhodamine B degradation, with the fastest degradation efficiency of 72% at 50 minutes. The results show that surfactant-free hydrothermally synthesized CZTS nanoparticles are a very promising material for the degradation of RhB dye due to the rapid degradation rate and high degradation efficiency.

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“…Produced for textile, leather and pharmaceutical industries, the degradation of this compound cab be easily performed by reduction at cathode because of its positive high redox potential (Feng et al, 2009). Photocatalytic processes have emerged with several advantages for organic wastewater treatment due to the complete destruction or mineralization of pollutants to carbon dioxide and inorganic constitutes in water and gas phases (Chen, Tsai & Huang, 2005;Wang, Zheng, Xu & Li, 2011). The main photocatalyst used in these processes is TiO 2 due to its low price, availability, non-photo-corrosion, suitable band gap energy and chemical stability (Haarstrick, Kut & Elmar, 1996;Matos, Laine & Herrmann, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effect of pH and temperature on photocatalytic oxidation of methyl orange using black sand as photocatalyst

2018

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Azo dyes are considered hazardous compounds for the environment and human health. Methyl orange is one type of azo dyes and it is widely used in textile, leather, and other chemical industries. The degradation of this compound is a challenge for traditional treatments. Advanced oxidation processes such as heterogeneous photocatalysis, sonolysis, radiolysis, etc., become an alternative for mineralizing organic compounds by producing a highly oxidant agent (OH•). Nowadays, a great number of research studies have tried to modify TiO 2 with metals in order to improve the degradation of hazardous pollutants such as azo dyes. This study used black sand as an alternative photocatalyst, evaluating the influence of pH (2, 5, 3 and 8) and temperature (20, 25, 30 and Palabras clave: colorantes azo, evaluación cinética, fotocatálisis heterogénea, influencia del pH y la temperatura.

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Treatment of Methyl Orange by Photocatalysis Floating Bed

Cited by 7 publications

References 17 publications

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Hydrothermally Synthesized Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanoparticles for Photocatalytic Degradation of Rhodamine B Dye

Effect of pH and temperature on photocatalytic oxidation of methyl orange using black sand as photocatalyst

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