Removal of pharmaceutically active compounds from synthetic and real aqueous mixtures and simultaneous disinfection by supported TiO2/UV-A, H2O2/UV-A, and TiO2/H2O2/UV-A processes

Bosio, Morgana; Satyro, Suéllen; Bassin, João Paulo; Saggioro, Enrico Mendes; Dezotti, Márcia

doi:10.1007/s11356-018-2108-x

Cited by 29 publications

(11 citation statements)

References 74 publications

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“…One of the major issues is the water pollution [3,4] by residual industrial liquids (RILs). Thus, a wide range of methodologies such as adsorption [5,6], biodegradation [4,7], and the so-called advanced oxidation processes (AOPs) [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] have been applied for the treatment of polluted water. Heterogeneous photocatalysis is one of the most efficient AOPs [9,11,12,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, a wide range of methodologies such as adsorption [5,6], biodegradation [4,7], and the so-called advanced oxidation processes (AOPs) [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] have been applied for the treatment of polluted water. Heterogeneous photocatalysis is one of the most efficient AOPs [9,11,12,[14][15][16]. This technology uses metal oxide-based semiconductors such as TiO 2 [9,11,12,17,18], ZnO [18][19][20][21], SnO 2 , [22] and CeO 2 [23] among others.…”

Section: Introductionmentioning

confidence: 99%

“…Heterogeneous photocatalysis is one of the most efficient AOPs [9,11,12,[14][15][16]. This technology uses metal oxide-based semiconductors such as TiO 2 [9,11,12,17,18], ZnO [18][19][20][21], SnO 2 , [22] and CeO 2 [23] among others. It has been reported that TiO 2 is the best photocatalyst to mineralize a wide range of pollutants to carbon dioxide and water [14,24], and this feature has been addressed as an exceptional combination of electronic structure, light absorption properties, charge transport characteristics, and low cost.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

et al. 2019

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Innovative composites based on an amorphous-carbon matrix containing a second phase ZnO oxide and/or highly dispersed Zn metallic were synthesized via a modified Pechini route, in which a partial pyrolysis method was reached. Studies of adsorption in the dark and the photocatalytic activity for the cationic azo-dye, basic blue 41, and degradation were carried out. X-ray diffraction patterns for the carbon matrix and its composite with Zn show characteristics of the amorphous carbon. The infrared in the mid region of the composite prepared with ZnO and Zn exhibit vibrational bands related to bonds zinc oxide. The surface pH of the material is the main factor responsible for the adsorption of the azo-dye, but the contribution of mesopores favored the diffusion of molecules from the bulk of solution to the pore framework. Esters-like functional groups on the surface of carbons hinder the adsorption of the azo-dye. When Zn is embedded within amorphous carbon the photocatalytic activity of the composites showed up to 2.4 higher than neat ZnO. The enhancement in the photocatalytic activity and stability of C/ZnO/Zn and C/Zn composites is discussed in terms of a protector effect by the carbon layers inserted in composites. Carbon layers are responsible to inhibit the lixiviation of ZnO particles along irradiation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

et al. 2019

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“…Advanced oxidation processes (AOPs) have been reported to be highly efficient processes for the degradation of refractory PPCPs (Miklos et al, 2018;Huang et al, 2020;Lee et al, 2020;Wang and Zhuan, 2020;Wu et al, 2020). Some AOPs, such as photo-Fenton, heterogeneous photocatalysis, UV/TiO 2 and UV/ H 2 O 2 have been explored to remove benzodiazepines in water (Bosio et al, 2019;Cunha et al, 2019;Mitsika et al, 2021). The photocatalytic degradation of the selected benzodiazepines (i.e., alprazolam and diazepam) was proved to be effective with a photo-Fenton reaction system (Mitsika et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Degradation of 17 Benzodiazepines by the UV/H2O2 Treatment

You

Pu²,

Yang

et al. 2021

Front. Environ. Sci.

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Benzodiazepines are one group of psychoactive drugs widely detected in water environments, and their persistence during conventional wastewater treatment has raised great concerns. Here we investigated the degradation of 17 benzodiazepines in water by UV/H2O2 treatment. The results showed that the UV/H2O2 treatment significantly increased the degradation of 17 benzodiazepines in phosphate buffer solutions at pH 7.0. This can be attributed to the high reactivity of hydroxyl radicals (·OH) towards benzodiazepines with second-order rate constants of 3.48 × 109 M−1 s−1–2.44 × 1010 M−1 s−1. The degradation of alprazolam, a typical benzodiazepine, during the UV/H2O2 treatment was increased with the increasing H2O2 dosage. The solution pH influenced the alprazolam degradation significantly, with the highest degradation at pH 7.0. Water matrix, such as anions (Cl−, HCO3−, NO3−) and humic acid, decreased the degradation of alprazolam by UV/H2O2 treatment. Based on the degradation products identified using quadrupole time-of-flight mass spectrometer, the degradation mechanisms of alprazolam by UV/H2O2 treatment were proposed, and hydroxylation induced by ·OH was the main reaction pathway. The degradation of 17 benzodiazepines by UV/H2O2 treatment in wastewater treatment plant effluent and river water was lower than that in phosphate buffer solutions. The results showed that the benzodiazepine psychoactive drugs in natural water can be effectively removed by the UV/H2O2 treatment.

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“…Advanced oxidative processes (AOPs) have been applied in an attempt to remove these contaminants from the environment, with the advantage of using highly reactive radicals, based on the formation of the hydroxyl radical ( ⋅ OH) for contaminant degradation [5,6]. The generation of hydroxyl radicals by AOPs for wastewater treatment has been reported using conventional oxidants, such as H 2 O 2 /UV [7], ozone/UV [8], and TiO 2 /H 2 O 2 /UV [9]. Only recently has the photolysis of chlorine species been proposed as an AOP for the generation of the ⋅ OH radical in water [10,11].…”

Section: Introductionmentioning

confidence: 99%

Endocrine Disruptor Degradation by UV/Chlorine and the Impact of Their Removal on Estrogenic Activity and Toxicity

Saggioro

Chaves

Felix

et al. 2019

International Journal of Photoenergy

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Recently, chlorination disinfection technology applying ultraviolet radiation (Cl/UV) has received attention as an advanced oxidative process (AOP) for the generation of highly oxidant species. Many studies have evaluated its effects on pathogen inactivation, contaminant removal, and formation of disinfection by-products (DBPs). However, the degradation of three endocrine disruptor chemicals (EDCs), 17β-estradiol (E2), 17α-ethinylestradiol (EE2), and bisphenol-A (BPA), associated with simultaneous disinfection and estrogenic activity and ecotoxicity assessments has not yet been reported. Compound degradation increased with increasing chlorine concentrations (2 mg·L-1 chlorine), with pseudo-first-order kinetics 1.86×10−2 s-1, 3.06×10−2 s-1, and 3.09×10−2 s-1 for BPA, E2, and EE2, respectively. The degradation kinetics in a WWTP effluent significantly decreased to 4.94×10−2 min-1, 4.75×10−2 min-1, and 4.84×10−2 min-1, for BPA, E2, and EE2, respectively. However, 45% TOC removal and disinfection of E. coli and total coliform bacteria (TCB) were observed in 10 min of treatment. The yeast estrogen screen (YES) revealed that the treatment did not form by-products with estrogenic activity, demonstrating cleavage or mineralization in the phenolic group, common to all assessed compounds. High cell growth inhibition and mortality for Raphidocelis subcapitata and Ceriodaphnia dubia, respectively, were observed during the photodegradation process. Thus, the formed DBPs may be responsible for the observed toxicity and should be taken into account in WWTP treatments in order to monitor the formation of chlorinated by-products.

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Removal of pharmaceutically active compounds from synthetic and real aqueous mixtures and simultaneous disinfection by supported TiO2/UV-A, H2O2/UV-A, and TiO2/H2O2/UV-A processes

Cited by 29 publications

References 74 publications

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

Degradation of 17 Benzodiazepines by the UV/H2O2 Treatment

Endocrine Disruptor Degradation by UV/Chlorine and the Impact of Their Removal on Estrogenic Activity and Toxicity

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