Application of advanced oxidation processes and toxicity assessment of transformation products

Sharma, Abha; Ahmad, Javed; Flora, S.J.S.

doi:10.1016/j.envres.2018.07.010

Cited by 243 publications

(67 citation statements)

References 149 publications

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“…According to the literature, the incorporation of the nitrate-nitrogen into the organic matrix and the subsequent formation on nitrated/nitrosated compounds could be the reason that mutagenicity levels increase in treated waters. Other authors have reported similar results in terms of increased toxicity after the treatment of wastewaters containing antibiotics [77,[234][235][236][237][238].…”

Section: Prospects and Challenges Of Aopssupporting

confidence: 63%

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

Cuerda-Correa

Alexandre-Franco

Fernández-González

2019

Water

512

240

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In this work, the application of advanced oxidation processes (AOPs) for the removal of antibiotics from water has been reviewed. The present concern about water has been exposed, and the main problems derived from the presence of emerging pollutants have been analyzed. Photolysis processes, ozone-based AOPs including ozonation, O3/UV, O3/H2O2, and O3/H2O2/UV, hydrogen peroxide-based methods (i.e., H2O2/UV, Fenton, Fenton-like, hetero-Fenton, and photo-Fenton), heterogeneous photocatalysis (TiO2/UV and TiO2/H2O2/UV systems), and sonochemical and electrooxidative AOPs have been reviewed. The main challenges and prospects of AOPs, as well as some recommendations for the improvement of AOPs aimed at the removal of antibiotics from wastewaters, are pointed out.

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Section: Prospects and Challenges Of Aopssupporting

confidence: 63%

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

Cuerda-Correa

Alexandre-Franco

Fernández-González

2019

Water

512

240

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“…The advanced oxidation processes (AOPs) [ 6 , 7 , 8 ] have been well known to be the effective method in removing toxic organic materials from water, gas and soil, as well as in producing hydrogen fuel gas form water. The characteristic of this process is the photochemical reaction between semiconductors and light (visible or ultraviolet), creating photogenerated electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

Fe-Doped g-C3N4: High-Performance Photocatalysts in Rhodamine B Decomposition

et al. 2020

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Herein, Fe-doped C3N4 high-performance photocatalysts, synthesized by a facile and cost effective heat stirring method, were investigated systematically using powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) surface area measurement, X-ray photoelectron (XPS), UV–Vis diffusion reflectance (DRS) and photoluminescence (PL) spectroscopy. The results showed that Fe ions incorporated into a g-C3N4 nanosheet in both +3 and +2 oxidation states and in interstitial configuration. Absorption edge shifted slightly toward the red light along with an increase of absorbance in the wavelength range of 430–570 nm. Specific surface area increased with the incorporation of Fe into g-C3N4 lattice, reaching the highest value at the sample doped with 7 mol% Fe (FeCN7). A sharp decrease in PL intensity with increasing Fe content is an indirect evidence showing that electron-hole pair recombination rate decreased. Interestingly, Fe-doped g-C3N4 nanosheets present a superior photocatalytic activity compared to pure g-C3N4 in decomposing RhB solution. FeCN7 sample exhibits the highest photocatalytic efficiency, decomposing almost completely RhB 10 ppm solution after 30 min of xenon lamp illumination with a reaction rate approximately ten times greater than that of pure g-C3N4 nanosheet. This is in an agreement with the BET measurement and photoluminescence result which shows that FeCN7 possesses the largest specific surface area and low electron-hole recombination rate. The mechanism of photocatalytic enhancement is mainly explained through the charge transfer processes related to Fe2+/Fe3+ impurity in g-C3N4 crystal lattice.

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“…In recent decades, the water pollution caused by organic contaminants, such as dyes, antibiotics, polycyclic aromatic hydrocarbons and phenols, is becoming a serious concern worldwide [1][2][3][4]. Scientists have carried out numerous solutions to control the water pollution and several achievements have been made [5][6][7][8][9][10]. Nowadays, whatever technique is applied to purify the contaminated water, consideration must be given to purification efficiency, cost, operability, and durability.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Microstructure and Photocatalytic Performance of a Modified Zeolite Supported Nanocrystal TiO2 Composite

Liao¹,

He²,

He³

2019

Catalysts

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A modified zeolite/TiO2 composite (MZTC) was prepared through a method of saturated infiltration and synthesis in situ. The crystalline phase, micromorphology, elementary composition, specific surface area, pore size distribution, chemical bond and band gap variation of the products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), BET specific surface area and pore size distribution analysis (BET), Fourier transform infrared spectroscopy (FTIR) and UV–vis diffuse reflectance spectroscopy (UV-vis DRS), respectively. The microscopic characterization results showed that TiO2 was homogeneously dispersed in the structure of zeolite at the nanoscale range, and a strong chemical bond was established between TiO2 and zeolite. The photocatalytic performance of MZTC was evaluated by studying the degradation rate of methylene blue (MB) dye in aqueous solution under UV-light irradiation. The results of the degradation experiment showed that the MB degradation rate of MZTC-2.5 was the highest, reaching 93.6%, which was 2.4 times higher than hydrolysis TiO2 powder (HTOP) containing the same mass of pure TiO2. The MB degradation rate of MZTC-2.5 still maintained 86.5% after five tests, suggesting the excellent recyclability of MZTC-2.5. The possible mechanism of MB degradation was also discussed.

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Application of advanced oxidation processes and toxicity assessment of transformation products

Cited by 243 publications

References 149 publications

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

Fe-Doped g-C3N4: High-Performance Photocatalysts in Rhodamine B Decomposition

Investigation of Microstructure and Photocatalytic Performance of a Modified Zeolite Supported Nanocrystal TiO2 Composite

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