Analysis of a Hybrid Suspended-Supported Photocatalytic Reactor for the Treatment of Wastewater Containing Benzothiazole and Aniline

Ferreiro, Cristian; Villota, Natalia; Lombraña, José Ignacio; Rivero, Marı́a J.; Zúñiga, Verónica; Rituerto, José Miguel

doi:10.3390/w11020337

Cited by 22 publications

(22 citation statements)

References 52 publications

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“…Textural characteristics, such as specific surface area (S BET ), micropore (V micro ) and mesopore (V meso ) volumes, and average pore diameter (D p ), were obtained by observing N 2 adsorption-desorption isotherms at 77 K [4]. The pH of the point of zero charge (pH pzc ) was determined using an acidimetric-alkalimetric titration method [5]. The bulk chemical composition of GAC samples was measured using X-ray fluorescence (XRF), as described previously [4].…”

Section: Methodsmentioning

confidence: 99%

“…Aniline (ANI) is mainly used in the synthesis of methylene diphenyl isocyanate to produce polyurethane foams, antioxidants, activators, and accelerators in the rubber industry, as well as in the synthesis of indigo and other dyes [3]. It is also employed as a raw material in the manufacturing of different types of fungicides in the agricultural and pharmaceutical industries [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO2/GAC

Ferreiro

Villota

Lombraña

et al. 2020

Water

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This work aims to study the sustainable catalytic ozonation of aniline promoted by granular active carbon (GAC) doped with TiO2. Aniline was selected as a model compound for the accelerator manufacturing industries used in the manufacture of rubber due to its environmental impact, low biodegradability, and harmful genotoxic effects on human health. Based on the evolution of total organic carbon (TOC), aniline concentration measured using high performance liquid chromatography (HPLC), pH and ozone concentration in liquid and gas phase, and catalyst loading, a three-phase reaction system has been modelled. The proposed three-phase model related the ozone transfer parameters and the pseudo-first order kinetic constants through three coefficients that involve the adsorption process, oxidation in the liquid, and the solid catalyst. The interpretation of the kinetic constants of the process allowed the predominance of the mechanism of Langmuir–Hinshelwood or modified Eley–Rideal to be elucidated. Seven intermediate aromatic reaction products, representative of the direct action of ozone and the radical pathway, were identified and quantified, as well as precursors of the appearance of turbidity, with which two possible routes of degradation of aniline being proposed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO2/GAC

Ferreiro

Villota

Lombraña

et al. 2020

Water

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“…There is rapidly growing interest in the development of self-cleaning ceramic membranes and their application in water treatments targeting organic contaminants. Membrane performance can be improved by increasing the catalytic membrane surface area and permeability, for example, by the removal of the target contaminants concentrated on the membrane [14,15]. Ceramic membranes have a catalytic layer consisting of catalytic nanoparticles such as iron oxide, which can enhance the decomposition of natural organic matter as it is combined with chemical oxidation promoters such as ozonation [16].…”

Section: Introductionmentioning

confidence: 99%

Diethylene Glycol-Assisted Organized TiO2 Nanostructures for Photocatalytic Wastewater Treatment Ceramic Membranes

Ahmad

Kim

et al. 2019

Water

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A high-performance photocatalytic ceramic membrane was developed by direct growth of a TiO2 structure on a macroporous alumina support using a hydrothermal method. The morphological nanostructure of TiO2 on the support was successfully controlled via the interaction between the TiO2 precursor and a capping agent, diethylene glycol (DEG). The growth of anatase TiO2 nanorods was observed both on the membrane surface and pore walls. The well-organized nanorods TiO2 reduced the perturbation of the alumina support, thus controlling the hydrolysis rate of the TiO2 precursor and reducing membrane fouling. However, a decrease in the amount of the DEG capping agent significantly reduced membrane permeability, owing to the formation of nonporous clusters of TiO2 on the support. Distribution of the organized TiO2 nanorods on the support was very effective for the improvement of the organic removal efficiency and antifouling under ultraviolet illumination. The TiO2 nanostructure associated with the reactive crystalline phase, rather than the amount of layered TiO2 formed on the support, which was found to be the key to controlling photocatalytic membrane reactivity. These experimental findings would provide a new approach for the development of efficacious photocatalytic membranes with improved performance for wastewater treatment.

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“…[ [42][43][44] Another issue that the application of UF in the WWTP must resolve is the treatment of the concentrates from the reject stream. This stream is composed of organic contaminants, refractory products (such as PPCPs) and pathogenic microorganisms.…”

Section: Physical Adsorptionmentioning

confidence: 99%

Water Reuse Study from Urban WWTPs via c-Ultrafiltration and Ozonation Technologies: Basis for Resilient Cities and Agriculture

et al. 2021

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The water–development nexus is essential for the advancement and progress of cities in the face of problems such as climate change, water security and increasing environmental stress in the agricultural sector. Aiming for a circular economy and, at the same time, improving the resilience of water supply alternatives and achieving a goal of zero waste, this work presents a technical–economic study of a novel continuous ultrafiltration (c-UF) system with self-cleaning capacity coupled to an ozonation process, for the treatment of urban WWTP effluent. The removal efficiencies achieved were analysed both through macroscopic parameters (suspended solids, turbidity) and for the most frequently occurring contaminants of emerging concern (CECs). Consequently, an effluent suitable for irrigation was obtained, with a total recovery factor of 97.92%, a concentration of suspended solids (SS) below 1 mg L−1, 0.06 NTU turbidity and toxicity free, complying with the new European Regulation on Water Reuse (EU 2020/741). A comparative analysis of the proposed process with regard to conventional tertiary treatment revealed that the proposed process was 39.1% more economic, with a cost of 0.0325 € m−3. This alternative treatment will be of great interest because of its favourable technical–economic characteristics, being postulated as a basic process for implementation in modern water reuse plants.

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Analysis of a Hybrid Suspended-Supported Photocatalytic Reactor for the Treatment of Wastewater Containing Benzothiazole and Aniline

Cited by 22 publications

References 52 publications

Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO2/GAC

Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO2/GAC

Diethylene Glycol-Assisted Organized TiO2 Nanostructures for Photocatalytic Wastewater Treatment Ceramic Membranes

Water Reuse Study from Urban WWTPs via c-Ultrafiltration and Ozonation Technologies: Basis for Resilient Cities and Agriculture

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