Kinetic degradation model and estrogenicity changes of EE2 (17α-ethinylestradiol) in aqueous solution by UV and UV/H2O2 technology

Zhang, Zhaohan; Feng, Yujie; Yu, Liu; Sun, Qian; Ren, Nanqi

doi:10.1016/j.jhazmat.2010.05.132

Cited by 51 publications

(17 citation statements)

References 31 publications

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“…The results show clearly that the initial concentration of each target EDC did not affect the degradation rate constants as the k values were almost the same at different initial EDC concentrations (Table 1). It is also noteworthy that the UV photolysis rate constants (k) of EE2 reported by Zhang et al (2010) is 5-10 times higher than the values obtained in this study. Zhang et al (2007) also investigated the photo-degradation kinetics of E1 and E2 in water and the reported k values of E1 and E2 in their study are 2-7 and 1-4 times of the data in this study.…”

Section: Other Analysiscontrasting

confidence: 80%

Removal of phenolic endocrine disrupting compounds from waste activated sludge using UV, H2O2, and UV/H2O2 oxidation processes: Effects of reaction conditions and sludge matrix

2014

Science of The Total Environment

139

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Section: Other Analysiscontrasting

confidence: 80%

Removal of phenolic endocrine disrupting compounds from waste activated sludge using UV, H2O2, and UV/H2O2 oxidation processes: Effects of reaction conditions and sludge matrix

2014

Science of The Total Environment

139

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“…The photolysis rate of H 2 O 2 directly depends on the UV light intensity . Therefore, improvement of the removal rate at high UV light intensity is because of the increase in generation of highly reactive • OH radicals from the photo‐dissociation of hydrogen peroxide . On the other hand, in the photocatalytic process, UV light irradiation provides the photons required for the generation of electron–hole pairs.…”

Section: Resultsmentioning

confidence: 99%

Hybrid Homogeneous and Heterogeneous Photocatalytic Processes for Removal of Triphenylmethane Dyes: Artificial Neural Network Modeling

Eskandarloo

Badiei

Behnajady

et al. 2016

CLEAN Soil Air Water

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Removal of two triphenylmethane dyes, Acid Fuchsin (AF) and Malachite green (MG), was studied by hybrid advanced oxidation processes of homogeneous (UV/Fe 2þ /H 2 O 2 ) and heterogeneous (UV/TiO 2 ÀSiO 2 ) photocatalysis. A comparison of various processes for removal of model pollutants was performed. The results showed that the utilizing hybrid photocatalytic processes in the presence of silica leads to rapid removal of pollutants, which may be ascribable to the synergistic influence of produced various radical species. The effects of operational variables were studied on the efficiency of the UV/Fe 2þ /H 2 O 2 /TiO 2 ÀSiO 2 hybrid process. An artificial neural network (ANN) model was intended to predict the removal efficiency of the UV/Fe 2þ /H 2 O 2 /TiO 2 ÀSiO 2 hybrid process under different operational conditions. The results indicated that there is a good concurrence between the ANN predicted values and experimental results with a correlation coefficient of 0.9873 and 0.9774 for removal of AF and MG dyes, respectively. The designed neural network model gives a dependable technique for modeling the removal efficiency of the UV/Fe 2þ /H 2 O 2 /TiO 2 ÀSiO 2 hybrid process. Moreover, the relative significance of each variable was computed based on the input-hidden and hidden-output connection weights of the neural network model. The initial concentration of dyes was the most significant variable in the removal efficiency.

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“…This is in agreement with the literature. Zhang et al [22] and Zhang and Li [23] (19). To investigate the Fenton-like degradation by the MgO 2 /Fe 2+ system under ambient conditions, we performed an experiment with 25 mg of MgO 2 and 10 mg of Fe 2+ added to 10 ppm EE2 and stirred under ambient conditions, and the efficiency of degradation was compared to that with 30% commercial H 2 O 2 .…”

Section: Photocatalytic Degradation Of Ee2mentioning

confidence: 99%

LP-UV-Nano MgO2 Pretreated Catalysis Followed by Small Bioreactor Platform Capsules Treatment for Superior Kinetic Degradation Performance of 17α-Ethynylestradiol

et al. 2019

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A successful attempt to degrade synthetic estrogen 17α-ethynylestradiol (EE2) is demonstrated via combining photocatalysis employing magnesium peroxide (MgO2)/low-pressure ultraviolet (LP-UV) treatment followed by biological treatment using small bioreactor platform (SBP) capsules. Reusable MgO2 was synthesized through wet chemical synthesis and extensively characterized by X-ray diffraction (XRD) for phase confirmation, X-ray photoelectron spectroscopy (XPS) for elemental composition, Brunauer-Emmett-Teller (BET) to explain a specific surface area, scanning electron microscopy (SEM) imaging surface morphology, and UV-visible (Vis) spectrophotometry. The degradation mechanism of EE2 by MgO2/LP-UV consisted of LP-UV photolysis of H2O2 in situ (produced by the catalyst under ambient conditions) to generate hydroxyl radicals, and the degradation extent depended on both MgO2 and UV dose. Moreover, the catalyst was successfully reusable for the removal of EE2. Photocatalytic treatment by MgO2 alone required 60 min (~1700 mJ/cm2) to remove 99% of the EE2, whereas biodegradation by SBP capsules alone required 24 h to remove 86% of the EE2, and complete removal was not reached. The sequential treatment of photocatalysis and SBP biodegradation to achieve complete removal required only 25 min of UV (~700 mJ/cm2) and 4 h of biodegradation (instead of >24 h). The combination of UV photocatalysis and biodegradation produced a greater level of EE2 degradation at a lower LP-UV dose and at less biodegradation time than either treatment used separately, proving that synergetic photocatalysis and biodegradation are effective treatments for degrading EE2.

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Kinetic degradation model and estrogenicity changes of EE2 (17α-ethinylestradiol) in aqueous solution by UV and UV/H2O2 technology

Cited by 51 publications

References 31 publications

Removal of phenolic endocrine disrupting compounds from waste activated sludge using UV, H2O2, and UV/H2O2 oxidation processes: Effects of reaction conditions and sludge matrix

Removal of phenolic endocrine disrupting compounds from waste activated sludge using UV, H2O2, and UV/H2O2 oxidation processes: Effects of reaction conditions and sludge matrix

Hybrid Homogeneous and Heterogeneous Photocatalytic Processes for Removal of Triphenylmethane Dyes: Artificial Neural Network Modeling

LP-UV-Nano MgO2 Pretreated Catalysis Followed by Small Bioreactor Platform Capsules Treatment for Superior Kinetic Degradation Performance of 17α-Ethynylestradiol

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