Treatment of a Food Industry Dye, Brilliant Blue, at Low Concentration Using a New Photocatalytic Configuration

Drhimer, Fatine; Rahmani, Maryem; Regraguy, Boutaina; Hajjaji, Souad El; Mabrouki, Jamal; Amrane, Abdeltif; Fourcade, Florence; Assadi, Aymen Amine

doi:10.3390/su15075788

Cited by 8 publications

(2 citation statements)

References 43 publications

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“…TiO 2 nanoparticles were synthesized through the hydrolysis of titanium isopropoxide (TTIP), which is the primary method for producing TiO 2 NPs [40].…”

Section: Synthesis Of Tio 2 Nps By the Extract Of Astragalus Boeticusmentioning

confidence: 99%

Green Development of Titanium Dioxide Using Astragalus boeticus for the Degradation of Cationic and Anionic Dyes in an Aqueous Environment

Maanane,

El Yadini,

El Alouani

et al. 2023

Water

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Wastewater discharge from the textile industry poses significant health problems for humans. As a result, the effluent waters are often rich in dyes, whose low natural decomposition capacity makes their treatment complex, thus contributing to environmental degradation. It becomes imperative to implement effective solutions for treating these contaminated waters, with a primary goal: to make them fit for human consumption. The present study focuses on the development of green TiO2 nanoparticles (TiO2-NP) using titanium (IV) isopropoxide as a precursor, along with the extract of Astragalus boeticus (A.B). These green TiO2 nanoparticles have been developed for use as highly efficient photocatalysts for the degradation of two types of dyes: Reactive Yellow 161 (RY161), an anionic dye, and Crystal Violet (CV), a cationic dye. The structural, microstructural, and optical properties of the synthesized material were characterized using XRD, FTIR, SEM, EDX, and UV-Vis methods. The results of these analyses revealed that the nanoparticles have a size of approximately 68 nm, possess an anatase structure, exhibit a spherical surface morphology, and have a band gap of 3.22 eV. The photocatalytic activity of the synthesized material demonstrated a 94.06% degradation of CV dye in a basic environment (pH = 10) within 30 min, with an initial CV concentration of 10 mg/L and a catalyst mass of 1 g/L. Additionally, it achieved a 100% degradation of RY161 dye in an acidic environment (pH = 4) within 90 min, with an initial RY161 concentration of 30 mg/L and a catalyst mass of 1 g/L. Furthermore, the recycling study indicated that the green TiO2 NPs catalyst could be effectively reused for up to five cycles. These experimental findings suggest that the developed TiO2 catalyst holds significant potential as an eco-friendly solution for remediating aqueous media polluted by both anionic and cationic dyes.

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“…TiO 2 nanoparticles were synthesized through the hydrolysis of titanium isopropoxide (TTIP), which is the primary method for producing TiO 2 NPs [40].…”

Section: Synthesis Of Tio 2 Nps By the Extract Of Astragalus Boeticusmentioning

confidence: 99%

Green Development of Titanium Dioxide Using Astragalus boeticus for the Degradation of Cationic and Anionic Dyes in an Aqueous Environment

Maanane,

El Yadini,

El Alouani

et al. 2023

Water

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“…The desorption and diffusion processes of VOCs and their by-products are typically negligible, and steady-state kinetic models often overlook the mass transfer effects. Thus, the adsorption of the pollutant and the oxidation reaction are usually described by the Langmuir-Hinshelwood (L-H) theory [23][24][25][26]. In this study, a continuous-tangential-flow photoreactor is employed to assess the impact of the mass transfer on the degradation of CB and CN at industrial concentrations.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of the Photocatalytic Degradation of Chlorinated Aromatic Volatile Organic Compounds: Mass Transfer Enhancement

Koné,

Assadi,

Belkessa

et al. 2024

Applied Sciences

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Chlorobenzene (CB) and Chloronaphthalene (CN) emissions from cement plant operations pose significant environmental risks. This study investigates the mass transfer effects of chlorinated aromatic Volatile Organic Compounds (VOCs), specifically CB and CN, in the gas phase of a continuous-tangential-flow annular photocatalytic reactor. The experiments involved introducing CB and CN into the reactor, and the degradation kinetics were analyzed using the Langmuir–Hinshelwood (L-H) model. The L-H model was applied to assess the impact of the flow rate, concentration, and relative humidity (% RH) on the degradation rate (DR). The results indicate that both the experimental and simulated degradation rates improved with increased flow rates (1 to 9 m3·h−¹) and inlet concentrations (30 to 216 mg·m−3). This enhancement of the DR correlates with the availability of active OH* species on the TiO2 surface. The L-H model emphasizes the role of H2O molecules in VOC removal kinetics. The degradation rates increased with a rising water content (5 to 55%), but adverse effects on VOC conversion were observed beyond a 55% RH. This study reveals a mass transfer effect, with internal diffusional limitations in the TiO2 pores under operational conditions. The kinetics were predominantly controlled by chemical kinetics and catalyst pore availability. Furthermore, this study demonstrates a higher CB degradation than CN in the reactor and experimental conditions. For a concentration of 1.328 mM·m−3, the CB DR ranged from 0.70 to 2.84 µM·m2·s−¹, as the flow rate varied from 1 to 9 m3·h−¹. The CN DR varied from 0.60 to 2.20 µM·m2·s−¹ within the same flow rate range.

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Study and Determination of the Physical and Chemical Properties of Selective Multifunctional Surfaces: Definitions and Characterization Methods

Elouardi,

Benchrifa,

Mabrouki

et al. 2024

Environmental Science and Engineering

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Treatment of a Food Industry Dye, Brilliant Blue, at Low Concentration Using a New Photocatalytic Configuration

Cited by 8 publications

References 43 publications

Green Development of Titanium Dioxide Using Astragalus boeticus for the Degradation of Cationic and Anionic Dyes in an Aqueous Environment

Green Development of Titanium Dioxide Using Astragalus boeticus for the Degradation of Cationic and Anionic Dyes in an Aqueous Environment

Kinetic Modeling of the Photocatalytic Degradation of Chlorinated Aromatic Volatile Organic Compounds: Mass Transfer Enhancement

Study and Determination of the Physical and Chemical Properties of Selective Multifunctional Surfaces: Definitions and Characterization Methods

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