2020
DOI: 10.1002/wer.1370
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Photocatalytic oxidative degradation of hydrocarbon pollutants in refinery wastewater using TiO2 as catalyst

Abstract: This study reports the photocatalytic oxidative degradation of hydrocarbon pollutants present in refinery wastewater under UV light using Fe 2 O 3 , MnO 2 , TiO 2 , and ZnO as catalysts. Among the catalysts, TiO 2 exhibited the highest photocatalytic degradation activity, that is, 92, 98.8, 91.5, and 93% conversion for benzene, toluene, phenol, and naphthalene, respectively, in the model refinery wastewater under the optimum reaction conditions of pH 3, 30°C, 90-min reaction time, and 100 mg/L catalyst dose. T… Show more

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Cited by 28 publications
(25 citation statements)
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“…Evidently, the single catalyst load results favored the TiO 2 due to its high active sites and hydroxyl radicals, which entrapped the contaminants [31,32]. This affirms that the photocatalytic nature of TiO 2 , once activated by UV radiations, produces a very reactive species, which led to the degradation of the organic substance in the solutions [29,36]. However, in the subsequent investigation of the nanocomposites in 1:1 ratio (A-TiO 2 and Z-TiO 2 ) loads (2-4 g), there is a prompt increase in the contaminant removal efficiency (Figure 6c,d) as compared to the individual components (Figure 6a,b).…”
Section: Effects Of Photocatalyst Dosagementioning
confidence: 54%
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“…Evidently, the single catalyst load results favored the TiO 2 due to its high active sites and hydroxyl radicals, which entrapped the contaminants [31,32]. This affirms that the photocatalytic nature of TiO 2 , once activated by UV radiations, produces a very reactive species, which led to the degradation of the organic substance in the solutions [29,36]. However, in the subsequent investigation of the nanocomposites in 1:1 ratio (A-TiO 2 and Z-TiO 2 ) loads (2-4 g), there is a prompt increase in the contaminant removal efficiency (Figure 6c,d) as compared to the individual components (Figure 6a,b).…”
Section: Effects Of Photocatalyst Dosagementioning
confidence: 54%
“…The chemical bonds and functional groups within a fingerprint region of wavenumber of 400-2000 cm −1 revealed by the FTIR spectra are presented in Figure 4. The spectrum also reveals the vibration bands between the reactive hydroxyl groups, as well as the hydrophilic nature of the TiO2 [28,36]. The peaks observed around 3250 cm −1 was attributed to the strong vibrations of OH groups bonded with water or TiO2, where the shift in the OH bonding or the overlayer might be due to the combined A or Z with the TiO2.…”
Section: Molecular Structures and Functional Groupsmentioning
confidence: 95%
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