Solar photo-Fenton and UV/H 2 O 2 processes against the antidepressant Venlafaxine in urban wastewaters and human urine. Intermediates formation and biodegradability assessment

Giannakis, Stefanos; Hendaoui, Idriss; Jović, Milica; Grandjean, Dominique; Alencastro, Luiz Felippe De; Girault, Hubert H.; Pulgarín, C.

doi:10.1016/j.cej.2016.09.084

Cited by 66 publications

(15 citation statements)

References 55 publications

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“…where TOC 0 and TOC t denote the TOC concentrations before and after oxidation, respectively. Residual concentration was determined spectrophotometrically (410 nm) using titanium(IV) oxysulfate in accordance with the DIN 38402H15 method (Giannakis et al 2017). The concentrations of residual Fe 2+ and Fe 3+ ions at the end of electrolysis were determined using the phenanthroline colorimetric method recommended by the American Public Health Association (APHA 1998).…”

Section: Chemicals Analytical Proceduresmentioning

confidence: 99%

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

et al. 2019

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This study aims to evaluate the degradation and mineralization of Malachite Green (MG) in an electro-Fenton process (EFP). We studied the influence of several important parameters including solution pH (2-11), current density (0-20 mA/cm 2), H 2 O 2 concentration (0-200 mg/L) and MG concentrations (200, 600, 1000, 1500, 2000, 3000 mg/L) at different reaction time (2.5-30 min). The intermediates produced during the degradation were determined by GC-MS. The optimum pH, current density and H 2 O 2 concentration were found to be approximately 3, 10 mA/cm 2 and 50 mg/L, respectively. It was concluded that acidic pH was required to increase the efficiency of the EFP. At optimum conditions and a reaction time of 15 min, MG was completely removed without any significant variation in the corresponding maximum wavelengths or new absorption bands. Due to formation of intermediates, almost all the organic compounds were completely mineralized (95.3%) to CO 2 and water at reaction time of 30 min. Results indicated the effect of hydroxyl radical (• OH) on MG degradation is greater than that of superoxide radical scavenger (O ⋅− 2). The results showed that the degradation process of MG followed pseudo-firstorder kinetic model and the treatment time required in EFP was 4.6 times lower than ECP. Furthermore, the results showed that EFP was an extremely efficient process for degradation and mineralization of a high concentration of MG (1000 mg/L) at a short reaction time (30 min).

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Section: Chemicals Analytical Proceduresmentioning

confidence: 99%

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

et al. 2019

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“…The pretreatment with UV-based or solar-assisted AOPs enhanced the biodegradability of the treated effluent, compared to the initial one. The gold standard of biodegradability tests, the Zahn–Wellens test revealed up to 20% increase in biodegradability of the treated effluents, by UV/H 2 O 2 or solar photo-Fenton [ 95 ], in simulated WW containing mg/L amounts of the selected pharmaceutical. Hence, the restriction of dilution of HWW or manufacturing flows could be effectively pre-treated.…”

Section: Treatment Strategy and Research Resultsmentioning

confidence: 99%

Light-Assisted Advanced Oxidation Processes for the Elimination of Chemical and Microbiological Pollution of Wastewaters in Developed and Developing Countries

2017

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In this work, the issue of hospital and urban wastewater treatment is studied in two different contexts, in Switzerland and in developing countries (Ivory Coast and Colombia). For this purpose, the treatment of municipal wastewater effluents is studied, simulating the developed countries’ context, while cheap and sustainable solutions are proposed for the developing countries, to form a barrier between effluents and receiving water bodies. In order to propose proper methods for each case, the characteristics of the matrices and the targets are described here in detail. In both contexts, the use of Advanced Oxidation Processes (AOPs) is implemented, focusing on UV-based and solar-supported ones, in the respective target areas. A list of emerging contaminants and bacteria are firstly studied to provide operational and engineering details on their removal by AOPs. Fundamental mechanistic insights are also provided on the degradation of the effluent wastewater organic matter. The use of viruses and yeasts as potential model pathogens is also accounted for, treated by the photo-Fenton process. In addition, two pharmaceutically active compound (PhAC) models of hospital and/or industrial origin are studied in wastewater and urine, treated by all accounted AOPs, as a proposed method to effectively control concentrated point-source pollution from hospital wastewaters. Their elimination was modeled and the degradation pathway was elucidated by the use of state-of-the-art analytical techniques. In conclusion, the use of light-supported AOPs was proven to be effective in degrading the respective target and further insights were provided by each application, which could facilitate their divulgation and potential application in the field.

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“…A specific amount of H 2 O 2 (mg/L) was added to reactor before the treatment, and no further hydrogen peroxide was added during the degradation. At the end of process, the residual concentration of hydrogen peroxide was determined through a spectrophotometer at 410 nm using titanium(IV) oxysulfate in accordance with the DIN 38402H15 method (Giannakis et al 2017). To determine the apparent reaction rate constant (k app ) values for the degradation of ceftriaxone, a pseudo-first-order kinetics model was used.…”

Section: Methodsmentioning

confidence: 99%

Photodegradation of ceftriaxone in aqueous solution by using UVC and UVC/H2O2 oxidation processes

et al. 2019

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This study investigated the performance of UVC/H 2 O 2 and UVC processes for the degradation and mineralization of ceftriaxone as an antibiotic. The highest ceftriaxone degradation was obtained at a solution pH of 5 and H 2 O 2 concentration of 10 mg/L. The apparent rate constant of ceftriaxone degradation was found to be 0.0302, 0.0165, and 0.0065 min −1 in the UVC/H 2 O 2 process for the initial ceftriaxone concentrations of 5, 10, and 20 mg/L, respectively. Degradation and mineralization efficiencies of ceftriaxone was obtained to be 100% and 58%, respectively, in UVC/H 2 O 2 process at reaction time of 120 min, whereas only 61% and 2.5% of ceftriaxone could be degraded and mineralized by UVC. The synergistic effect of UVC/H 2 O 2 was found to be 35%. The presence of anionic species improved the photolysis efficiency which degraded ceftriaxone from 61 to 83%, while, in the UVC/H 2 O 2 process, ability degradation declined from 100 to 70%. The efficiency of UVC/H 2 O 2 and UVC process was not greatly affected in real tap water. Besides, the reduction patterns in the UVC/H 2 O 2 and UVC processes were better described by pseudo-first-and second-order kinetics model with a reaction rate constant of 0.0165 and 0.0012 min −1 , respectively. The rate constant of ceftriaxone degradation in the UVC/H 2 O 2 process and at the presence of radical scavenger was found to be around 3.3 times lower than the one in its absence.

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Solar photo-Fenton and UV/H 2 O 2 processes against the antidepressant Venlafaxine in urban wastewaters and human urine. Intermediates formation and biodegradability assessment

Cited by 66 publications

References 55 publications

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

Light-Assisted Advanced Oxidation Processes for the Elimination of Chemical and Microbiological Pollution of Wastewaters in Developed and Developing Countries

Photodegradation of ceftriaxone in aqueous solution by using UVC and UVC/H2O2 oxidation processes

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