Degradation of 3,5-dichlorophenol by UV-C photolysis and UV-C-activated persulfate oxidation process in pure water and simulated tertiary treated urban wastewater

Ucun, Olga Koba; Montazeri, Bahareh; Arslan-Alaton, İdil; Ölmez-Hancı, Tuğba

doi:10.1080/09593330.2020.1732478

Cited by 10 publications

(4 citation statements)

References 55 publications

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“…Solution pH can affect the efficiency of homogenous photochemical and heterogeneous catalytic AOPs remarkably, particularly those involving metals/metal ions/ oxides [32,35,50,56,57]. In the present study, no pH adjustment was carried out for the UV-C/PS treatment since in our former work, the photochemical oxidation of IPR was efficient at around neutral pH values [36][37][38]. In previous studies, it was demonstrated that pH affects the ZVI/PS treatment performance in the degradation of contaminants due to its catalytic activity, formation, and type of dissolved Fe species [58,59].…”

Section: Effect Of Phmentioning

confidence: 70%

“…The average radiation flux of the UV-C lamps (UV-C intensity) was measured as 0.5 W/L by a radiometer incorporated into the reaction chamber. The UV-C/PS experiments were conducted at the natural pH values of pure water and synthetic wastewater (≈6-7) without pH adjustment due to the fact that according to our previous studies, this particular pH was suitable for UV-C/PS treatment, and avoiding pH adjustment is a more realistic way to treat tertiary urban effluent [36][37][38]. All of the ZVI/PS and ZVA/PS experiments were carried out in 500 mL-capacity borosilicate glass beakers under continuous stirring at 150 rpm to maintain the oxygen concentration of the reaction solution near saturated levels and to distribute ZVI and ZVA particles properly in the reaction solution.…”

Section: Methodsmentioning

confidence: 99%

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Iprodione Removal by UV-Light-, Zero-Valent Iron- and Zero-Valent Aluminium-Activated Persulfate Oxidation Processes in Pure Water and Simulated Tertiary Treated Urban Wastewater

Montazeri

Ucun

Arslan-Alaton

et al. 2021

Water

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The degradation of iprodione (IPR), a once frequently used but recently banned dicarboximide fungicide, by UV-C light-, zero-valent iron- (ZVI), and zero-valent aluminium (ZVA)-activated persulfate (PS) oxidation processes was comparatively studied in distilled (pure) water (DW) and simulated, tertiary treated urban wastewater (SWW). The performance of PS-activated oxidation processes was examined by following IPR (2–10 mg/L) removal, PS (0.01–1.00 mM) consumption, metal ion release (for the two heterogeneous catalytic oxidation processes), dissolved organic carbon (DOC) removal as well as hydroxylated aromatic and low molecular weight aliphatic degradation products. The effect of pH and PS concentrations on IPR removal was examined in DW. While the experiments in DW highlighted the superior performance of UV-C/PS treatment (with 78% DOC removal after 120 min at pH = 6.2), the performance of UV-C/PS treatment decreased sharply (to 24% DOC removal after 120 min at pH = 6.8) in the complex wastewater matrix (in SWW). Complete IPR (in 20 min) and 40% DOC (in 120 min) removals were obtained with ZVI/PS treatment (1 g/L ZVI, 1.5 mM PS, pH = 3.0), which was the most effective oxidation process in SWW. The treatment performance was strongly influenced by the SWW constituents, and UV-C/PS treatment appeared to be the most sensitive to it.

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Section: Effect Of Phmentioning

confidence: 70%

Section: Methodsmentioning

confidence: 99%

Iprodione Removal by UV-Light-, Zero-Valent Iron- and Zero-Valent Aluminium-Activated Persulfate Oxidation Processes in Pure Water and Simulated Tertiary Treated Urban Wastewater

Montazeri

Ucun

Arslan-Alaton

et al. 2021

Water

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“…UV‐C exhibited the highest percentage degradation compared to other light irradiation due to its high energetic photons, which helped to degrade the pollutant. [ 60–62 ]…”

Section: Resultsmentioning

confidence: 99%

“…UV-C exhibited the highest percentage degradation compared to other light irradiation due to its high energetic photons, which helped to degrade the pollutant. [60][61][62] Figure 6b displays the photocatalytic degradation of 2-CP using MTN and P25 under different light irradiation. Generally, MTN illustrated better photocatalytic performance than P25 under all light irradiation conditions, thanks to the presence of TSD and OV in its structures.…”

Section: Photocatalytic Activity Of the Catalystsmentioning

confidence: 99%

Insight into the influence of defect sites in mixed phase of mesoporous titania nanoparticles toward photocatalytic degradation of 2‐chlorophenol: Effect of light source

Marfur

Jaafar

2021

J Chinese Chemical Soc

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The impact of different light irradiation was studied on photocatalytic degradation of 2‐chlorophenol (2‐CP) using mesoporous titania nanoparticles (MTNs) prepared by microwave‐assisted methods. The photoactivity of MTNs was also compared with pretreated commercial TiO2 and Degussa P25 (P25). The reactions were conducted for 2.5 hr under UV‐A, UV‐C, sunlight, and visible light using a batch reactor. The catalysts were characterized by X‐ray powder diffractometer, UV–Vis diffuse reflectance spectroscopy, photoluminescence, Brunauer–Emmett–Teller method, field‐emission scanning electron microscopy, transmission electron microscopy, and X‐ray photoelectron spectroscopy. The characterization results confirmed that MTN consisted a composition of 21% rutile phase and 79% anatase phase with Ti3+ site defects (TSDs) and oxygen vacancies (OVs) in their structures because of their anionic surfactant nature, microwave heating, and high calcination temperature during the catalyst preparation. Besides, the photoactivity of MTN upon degradation of 2‐CP under sunlight has exhibited the best performance with 100% degradation followed by UV‐A, visible light, and UV‐C with degradation of 96, 52, and 39%, respectively. MTNs showed a remarkable performance due to their mixed‐phase crystalline structures as well as the formation of TSDs and OVs, which improved the charge migration, lowered the band gap energy, and reduced the rate of electron–hole recombination, thus succeeded to be activated under a wide range of light responses.

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On the toxicity behaviour of composite polyaniline-zinc oxide photocatalytic nanoparticles and their surrogate chemicals

Arslan-Alaton

Ucun

Bekbölet

et al. 2023

Applied Catalysis A: General

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Degradation of 3,5-dichlorophenol by UV-C photolysis and UV-C-activated persulfate oxidation process in pure water and simulated tertiary treated urban wastewater

Cited by 10 publications

References 55 publications

Iprodione Removal by UV-Light-, Zero-Valent Iron- and Zero-Valent Aluminium-Activated Persulfate Oxidation Processes in Pure Water and Simulated Tertiary Treated Urban Wastewater

Iprodione Removal by UV-Light-, Zero-Valent Iron- and Zero-Valent Aluminium-Activated Persulfate Oxidation Processes in Pure Water and Simulated Tertiary Treated Urban Wastewater

Insight into the influence of defect sites in mixed phase of mesoporous titania nanoparticles toward photocatalytic degradation of 2‐chlorophenol: Effect of light source

On the toxicity behaviour of composite polyaniline-zinc oxide photocatalytic nanoparticles and their surrogate chemicals

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