Photocatalytic degradation of p-chlorophenol by hybrid H2O2 and TiO2 in aqueous suspensions under UV irradiation

Nguyen, Anh Thu; Juang, Ruey‐Shin

doi:10.1016/j.jenvman.2014.08.023

Cited by 86 publications

(30 citation statements)

References 44 publications

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“…The results of the study by Baeza et al were also similar to these same findings (Baeza et al 2003). But, some of the other studies have proved the opposite (Nguyen and Juang 2015;. In this study, UV/H 2 O 2 /ZrO 2 process was found the most perfect one.…”

Section: Comparing the Efficiency Of Uv Irradiation And Uv/ H 2 O 2 Asupporting

confidence: 88%

Comparing the efficiency of UV/ZrO2 and UV/H2O2/ZrO2 photocatalytic processes in furfural removal from aqueous solution

et al. 2018

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Furfural is a toxic chemical compound that is widely applied as a solvent in a great many of industries, and it can cause many problems to the human beings and environment. Various methods of removing furfural from the wastewaters have been studied. AOPs methods are utilized for the elimination of a vast majority of the pollutants due to their high efficiency as well as for their lack of creating secondary contamination. Therefore, the present study aims at comparing the efficiency of UV/ZrO 2 and UV/H 2 O 2 /ZrO 2 photocatalytic processes in removing furfural from aqueous solutions. The solution's initial pH, furfural's concentration, zirconium catalyst dosage and time were investigated as the parameters influencing the removal efficiency by the two foresaid processes, and the effect of H 2 O 2 addition in various concentrations into UV/H 2 O 2 /ZrO 2 process was also evaluated. Spectrophotometer device was employed to assay the concentration of the residual furfural. The results indicated that the pH of the environment, the amount of the nanoparticle and H 2 O 2 input concentration largely influence the furfural omission. The optimal condition for the removal of furfural in UV/ZrO 2 process in an initial concentration of 20 mg/L, a pH equal to 3, a catalyst dose of 0.25 g/L during a period of 60-min time was 81.6%, and it was 99% for UV/H 2 O 2 /ZrO 2 process in a pH equal to 7 with the addition of H 2 O 2 for a concentration of 0.75 mL/L under the same conditions. Generally, it can be concluded that UV/H 2 O 2 /ZrO 2 and UV/ZrO 2 photocatalytic processes can effectively be applied to remove furfural from the aqueous solutions, especially in lower concentrations.

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Section: Comparing the Efficiency Of Uv Irradiation And Uv/ H 2 O 2 Asupporting

confidence: 88%

Comparing the efficiency of UV/ZrO2 and UV/H2O2/ZrO2 photocatalytic processes in furfural removal from aqueous solution

et al. 2018

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“…Using the UV-Vis/NIR spectrophotometer, the dye concentration was obtained. After each experiment, the composite nanofibers were washed many times using distilled water to be able to be reused again (Seo et al 2017;Mohamed et al 2017;Nguyen and Juang 2015). The photodegradation efficiency was calculated accordingly:…”

Section: Photodegradation Experimentsmentioning

confidence: 99%

Photocatalytic degradation of organic dyes using composite nanofibers under UV irradiation

et al. 2018

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In this work, photocatalytic degradation of organic dyes such as methylene blue (MB) and indigo carmine (IC) have been studied by composite nanofibers systems containing cellulose acetate (CA), multiwall carbon nanotubes (CNT) and TiO 2 nanoparticles under UV light. The amino factionalized TiO 2 -NH 2 NPs cross-linked to the CA/CNT composite nanofibers works as a semiconductor catalyst. The morphology and crystallinity were characterized by scanning electron microscopy, transmission electron microscopy (TEM), X-ray diffraction, and Fourier transform infrared spectroscopy. It was also seen that many factors affected the photodegradation rate, mainly the pH of the solution and the dye concentration, temperature, etc. The study demonstrated that IC degrades at a higher rate than MB. The maximum photodegradation rate of both organic dyes was achieved at a pH 2. In comparison to other studies, this work achieved high photodegradation rate in lower time and using less power intensity.

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“…Furthermore, the lack of ·HO 2 radicals suppresses Equations (6)–(8), and these reactions will also inhibit oxidation, as they produce oxidizing substances lower in oxidizability. To summarize, the photocatalyst will show better oxidizing capacity at neutral pH or higher [30,31,32,33]. As can be seen in Figure 4a,b, the residual concentrations of TC for pH values ranging from 3.0 to 6.0 were all around 35% at 120 min, and the apparent rate constants were 8.5 × 10 −3 , 9.2 × 10 −3 , 9.5 × 10 −3 and 9.7 × 10 −3 min −1 .…”

Section: Resultsmentioning

confidence: 99%

Degradation of Tetracycline with BiFeO3 Prepared by a Simple Hydrothermal Method

et al. 2015

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BiFeO3 particles (BFO) were prepared by a simple hydrothermal method and characterized. BFO was pure, with a wide particle size distribution, and was visible light responsive. Tetracycline was chosen as the model pollutant in this study. The pH value was an important factor influencing the degradation efficiency. The total organic carbon (TOC) measurement was emphasized as a potential standard to evaluate the visible light photocatalytic degradation efficiency. The photo-Fenton process showed much better degradation efficiency and a wider pH adaptive range than photocatalysis or the Fenton process solely. The optimal residual TOC concentrations of the photocatalysis, Fenton and photo-Fenton processes were 81%, 65% and 21%, while the rate constants of the three processes under the same condition where the best residual TOC was acquired were 9.7 × 10−3, 3.2 × 10−2 and 1.5 × 10−1 min−1, respectively. BFO was demonstrated to have excellent stability and reusability. A comparison among different reported advanced oxidation processes removing tetracycline (TC) was also made. Our findings showed that the photo-Fenton process had good potential for antibiotic-containing waste water treatment. It provides a new method to deal with antibiotic pollution.

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Photocatalytic degradation of p-chlorophenol by hybrid H2O2 and TiO2 in aqueous suspensions under UV irradiation

Cited by 86 publications

References 44 publications

Comparing the efficiency of UV/ZrO2 and UV/H2O2/ZrO2 photocatalytic processes in furfural removal from aqueous solution

Comparing the efficiency of UV/ZrO2 and UV/H2O2/ZrO2 photocatalytic processes in furfural removal from aqueous solution

Photocatalytic degradation of organic dyes using composite nanofibers under UV irradiation

Degradation of Tetracycline with BiFeO3 Prepared by a Simple Hydrothermal Method

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