Hydrothermal synthesis of 3D cauliflower anatase TiO<sub>2</sub> and bio sourced activated carbon: adsorption and photocatalytic activity in real water matrices

Mouchtari, El Mountassir El; Mersly, Lekbira El; Jhabli, Oussama; Anane, Hafid; Piram, Anne; Briche, Samir; Wong-Wah-Chung, Pascal; Rafqah, Salah

doi:10.1080/03067319.2022.2118586

Cited by 7 publications

(4 citation statements)

References 60 publications

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“…The photocatalytic degradation of CBZ and hormones was carried out with an irradiation setup previously used by El Mouchtari et al [35]. The adsorption capacity of the three AC/TiO 2 ball composites was evaluated in a dark environment at 25 • C. Magnetic stirring was maintained until saturation of the material (adsorption-desorption equilibrium) for two hours.…”

Section: Photocatalysis Experimentsmentioning

confidence: 99%

“…The use of activated carbon and TiO 2 in a composite material (AC/TiO 2 ) has shown promising results in removing micropollutants and their byproducts from both air and water due to the enhanced adsorption and photocatalytic capabilities of the composite material [32]. This technology is still under investigation and optimization and could be a valuable additional process to the suite of technologies available for micropollutant removal [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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Sol-Gel Synthesis of New TiO2 Ball/Activated Carbon Photocatalyst and Its Application for Degradation of Three Hormones: 17α-EthinylEstradiol, Estrone, and β-Estradiol

Mouchtari

Mersly

Belkodia

et al. 2023

Toxics

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Many approaches have been investigated to eliminate pharmaceuticals in wastewater treatment plants during the last decades. However, a lack of sustainable and efficient solutions exists for the removal of hormones by advanced oxidation processes. The aim of this study was to synthesize and test new photoactive bio composites for the elimination of these molecules in wastewater effluents. The new materials were obtained from the activated carbon (AC) of Arganian spinosa tree nutshells and titanium tetrachloride by the sol gel method. SEM analysis allowed one to confirm the formation of TiO2 particles homogeneously dispersed at the surface of AC with a controlled titanium dioxide mass ratio, a specific TiO2 anatase structure, and a highly specific surface area, evidenced by ATG, XRD, and BET analysis, respectively. The obtained composites were revealed to quantitatively absorb carbamazepine (CBZ), which is used as a referred pharmaceutical, and leading to its total elimination after 40 min under irradiation with the most effective material. TiO2 high content disfavors CBZ adsorption but improves its degradation. In the presence of the composite, three hormones (17α-ethinylestradiol, estrone, and β-estradiol) are partially adsorbed onto the composite and totally degraded after 60 min under UV light exposure. This study constitutes a promising solution for the efficient treatment of wastewater contaminated by hormones.

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Section: Photocatalysis Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis of New TiO2 Ball/Activated Carbon Photocatalyst and Its Application for Degradation of Three Hormones: 17α-EthinylEstradiol, Estrone, and β-Estradiol

Mouchtari

Mersly

Belkodia

et al. 2023

Toxics

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“…Recently, numerous studies have focused on advanced oxidation processes for the removal of pharmaceutical pollutants from wastewaters [17][18][19][20]. These processes have demonstrated their effectiveness against toxic and non-biodegradable organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

“…In general, the excitation of the photoactive material under the action of artificial or natural light leads to the formation of hydroxyl radicals (OH • ). These radicals are very strong oxidizing agents, i.e., they can oxidize many organic compounds, up to mineralization (conversion of the pollutants into CO 2 , H 2 O, and inorganic ions) [17,[19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of the Antibiotic Sulfamethazine Using Decatungstate Anions in an Aqueous Solution: Mechanistic Approach

Edaala,

El Mersly,

Aloui Tahiri

et al. 2023

Water

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The aim of this study is to propose a successful method for the treatment of water contaminated by pharmaceutical pollutants through homogeneous photocatalysis in the presence of decatungstate ions (W10O324−). Sulfamethazine (SMZ), a sulfonamide antibiotic, was used as a model molecule. The results showed that SMZ could be effectively degraded with this process under simulated solar irradiation. SMZ degradation kinetics were studied with different dioxygen and SMZ concentrations, pH values, and photocatalyst masses. Optimal conditions were determined to be pH 7, [Na4W10O32] = 0.33 g/L, and [SMZ] = 13.9 mg/L under the aerated condition, resulting in 85% SMZ degradation in 240 min, using a 36W-UVA/UVB light source. Hydroxyl radicals were identified as the major contributors to SMZ elimination. Four photoproducts identified with high-performance liquid chromatography coupled with mass spectrometry were formed by the cleavage of the sulfonamide bond and the hydroxylation of both the aromatic ring and pyrimidine moiety. SMZ was completely mineralized after 90 h of irradiation in the presence of decatungstate anions. These results provided a mechanism for the photocatalytic degradation of SMZ in an aqueous solution. To sustain this mechanism, theoretical studies were carried out using density functional theory calculations. This involved Fukui functional analyses, including ring hydroxylation, C-S bond cleavage, and molecular rearrangement processes.

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Degradation of diethyl phthalate using a visible photocatalytic membrane reactor

Sasirekha

Karthikeyan

Naveenkumar³

2023

Biomass Conv. Bioref.

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Hydrothermal synthesis of 3D cauliflower anatase TiO₂ and bio sourced activated carbon: adsorption and photocatalytic activity in real water matrices

Cited by 7 publications

References 60 publications

Sol-Gel Synthesis of New TiO2 Ball/Activated Carbon Photocatalyst and Its Application for Degradation of Three Hormones: 17α-EthinylEstradiol, Estrone, and β-Estradiol

Sol-Gel Synthesis of New TiO2 Ball/Activated Carbon Photocatalyst and Its Application for Degradation of Three Hormones: 17α-EthinylEstradiol, Estrone, and β-Estradiol

Photocatalytic Degradation of the Antibiotic Sulfamethazine Using Decatungstate Anions in an Aqueous Solution: Mechanistic Approach

Degradation of diethyl phthalate using a visible photocatalytic membrane reactor

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Hydrothermal synthesis of 3D cauliflower anatase TiO2 and bio sourced activated carbon: adsorption and photocatalytic activity in real water matrices

Cited by 7 publications

References 60 publications

Sol-Gel Synthesis of New TiO2 Ball/Activated Carbon Photocatalyst and Its Application for Degradation of Three Hormones: 17α-EthinylEstradiol, Estrone, and β-Estradiol

Sol-Gel Synthesis of New TiO2 Ball/Activated Carbon Photocatalyst and Its Application for Degradation of Three Hormones: 17α-EthinylEstradiol, Estrone, and β-Estradiol

Photocatalytic Degradation of the Antibiotic Sulfamethazine Using Decatungstate Anions in an Aqueous Solution: Mechanistic Approach

Degradation of diethyl phthalate using a visible photocatalytic membrane reactor

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Hydrothermal synthesis of 3D cauliflower anatase TiO₂ and bio sourced activated carbon: adsorption and photocatalytic activity in real water matrices