The impact of material design on the photocatalytic removal efficiency and toxicity of two textile dyes

Cherif, S.; Djelal, Hayet; Firmin, Stéphane; Bonnet, Pierre; Frezet, Lawrence; Kane, Abdoulaye; Assadi, Aymen Amine; Trari, M.; Yazid, Hynda

doi:10.1007/s11356-022-20452-2

Cited by 5 publications

(5 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the main disadvantage of these methods is that they do not eliminate (nor mineralize) the pollutants, but rather, they transfer them from one phase to another [3]. Nowadays, advanced oxidation processes (AOPs) have been proposed as alternative methods for the removal of pollutants in hospital effluents among other compounds in wastewater [27,28]. The principle of advanced oxidation processes (O 3 /H 2 O 2 , UV/O 3 , UV/H 2 O 2 , H 2 O 2 /Fe 2+ , and UV-TiO 2 ) is to produce a hydroxyl radical in water, which is a very powerful oxidant (E • = 2.8 V).…”

Section: Introductionmentioning

confidence: 99%

Advanced Photocatalytic Treatment of Wastewater Using Immobilized Titanium Dioxide as a Photocatalyst in a Pilot-Scale Reactor: Process Intensification

et al. 2022

Self Cite

View full text Add to dashboard Cite

In many nations, particularly those experiencing water scarcity, novel approaches are being applied to clean wastewater. Heterogeneous photocatalysis is the most widely used of these approaches because it entails the decomposition of organic molecules into water and carbon dioxide, which is a more ecologically benign process. In our study, we studied the photocatalytic degradation process on the effluent flumequine. This treatment is made through a solar pilot reactor in the presence of immobilized titanium dioxide with three light intensities and two types of water as solvents. A variety of factors that might influence the rate of deterioration, such as flow rate, light intensity, and initial concentration, have been investigated. The maximal degradation of flumequine was achieved at more than 90% after 2.5 h under optimal conditions (an initial concentration of 5 mg/L, three lamp light intensities, and a flow rate of 29 L/h). By combining the oxidized agent H2O2 with this process, the photocatalytic activity was improved further to 97% under the same conditions. The mineralization of this product has also been tested using total organic carbon (TOC) analysis. A high mineralization rate has been recorded at around 50% for a high initial concentration (20 mg/L) at a flow rate of 126 L/h. The results demonstrated the highly effective removal of flumequine and the efficacy of this photocatalytic system.

show abstract

Section: Introductionmentioning

confidence: 99%

Advanced Photocatalytic Treatment of Wastewater Using Immobilized Titanium Dioxide as a Photocatalyst in a Pilot-Scale Reactor: Process Intensification

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Then, ZnO NRs were added to the structure . ZnO NRs have photocatalytic activity and are semiconductors, leading to EBT photocatalytic degradation . The preparation process of the prepared Fe 3 O 4 @PVA–Au/ZnO magnetic photocatalytic system is presented in Figure .…”

Section: Results and Discussionmentioning

confidence: 99%

Efficient Photodegradation of Eriochrome Black-T by a Trimetallic Magnetic Self-Synthesized Nanophotocatalyst Based on Zn/Au/Fe-Embedded Poly(vinyl alcohol)

et al. 2022

View full text Add to dashboard Cite

This study presents a novel photocatalytic system for photocatalytic degradation of Eriochrome black-T (EBT) dye via green light-emitting diode (LED) light exposure. This photocatalyst is comprised of nanoscale components, i.e., poly-(vinyl alcohol) (PVA), magnetic iron oxide nanoparticles (Fe 3 O 4 NPs), gold NPs (Au NPs), and zinc oxide nanorods (ZnO NRs), rendering an active high surface area. The most highlighted property from the structural facet is the superparamagnetic behavior of Fe 3 O 4 NPs, which provides a facile collection of magnetic photocatalyst NPs from the reaction flask and is successfully recycled eight times without considerable reduction in catalytic behavior. Briefly, the photocatalytic degradation at its highest efficiency reached 51.4% (10 ppm dye solution, 5.0 mL) and 64.75% (8 ppm dye solution, 5.0 mL) utilizing 10 mg of the designed photocatalyst (formulated as Fe 3 O 4 @PVA−Au/ZnO), a magnetic photocatalytic system under green LED light (7 W, 526 nm) exposure for 60 min. Besides, the photocatalytic degradation mechanism of the EBT dye by the as-prepared photocatalyst was proposed. Based on the obtained results, the presented photocatalytic method was recommended for scaling up and large-scale exploitation for the purification of the water resources.

show abstract

“…All Petri plates were placed in an incubator at 25 • C for two days, protected from light. The number of germinated seeds and root length were measured after 48 h [31,32]. The results were analyzed by calculating the index of germination, where the number of germinated seeds, germination rate (%), and root length (mm), were determined by the following equation: The efficacy of the photo-Fenton process is negatively impacted by increasing the Fe 2+ content from 0.1 mM to 0.3 Mm (Figure 2).…”

Section: Phytotoxicity Assaymentioning

confidence: 99%

Doxycycline Removal by Solar Photo-Fenton on a Pilot-Scale Composite Parabolic Collector (CPC) Reactor

Bensaibi,

Chabani,

Bouafia

et al. 2023

Processes

Self Cite

View full text Add to dashboard Cite

In this study, the solar photo-Fenton (SPF) process was investigated for the degradation of doxycycline (DOX) using a solar compound parabolic collector (CPC) reactor and a borosilicate serpentine tube with an irradiated volume of 1.8 L. The influence of the operating parameters, such as H2O2, Fe2+ dosage, and DOX concentration, was investigated. The optimum H2O2, Fe2+ dosage, and DOX concentration were found to be 4, 0.1, and 0.06 mM, respectively. The results of photo-Fenton experiments fitted the pseudo-first-order kinetic equation (R2 = 0.99). The efficiency of the treatment under optimized conditions was analyzed by an HPLC analysis of the samples, chemical oxygen demand (COD), and total organic carbon (TOC). The results obtained showed that the solar photo-Fenton process achieved a DOX degradation of 95.07%, a COD elimination of 81.43%, and a TOC elimination of 73.05%. The phytotoxicity tests revealed a 73.32% decrease in the germination index of watercress seeds, demonstrating that the SPF process minimizes the toxicity of the chemical and did not have any negative impact on plant growth. Overall, the results of this study suggest that SPF is a promising technology for the removal of doxycycline from wastewater.

show abstract

The impact of material design on the photocatalytic removal efficiency and toxicity of two textile dyes

Cited by 5 publications

References 64 publications

Advanced Photocatalytic Treatment of Wastewater Using Immobilized Titanium Dioxide as a Photocatalyst in a Pilot-Scale Reactor: Process Intensification

Advanced Photocatalytic Treatment of Wastewater Using Immobilized Titanium Dioxide as a Photocatalyst in a Pilot-Scale Reactor: Process Intensification

Efficient Photodegradation of Eriochrome Black-T by a Trimetallic Magnetic Self-Synthesized Nanophotocatalyst Based on Zn/Au/Fe-Embedded Poly(vinyl alcohol)

Doxycycline Removal by Solar Photo-Fenton on a Pilot-Scale Composite Parabolic Collector (CPC) Reactor

Contact Info

Product

Resources

About