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

Abstract

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.

Degradation of Phenol via an Advanced Oxidation Process (AOP) with Immobilized Commercial Titanium Dioxide (TiO2) Photocatalysts

“…Due to the large carbon content in the real wastewater, TOC was not determined. This difference in photocatalytic activity was also observed by Jallouli et al, for the photocatalytic degradation of ibuprofen [ 18 ], or Kane et al, for the degradation of flumequine [ 49 ]. For a technical process based on photocatalysis, it is therefore very important to ensure a constant water quality.…”

“…The photocatalytic performance might be increased further for higher flow rates, which could not be established in our setup. The better photocatalytic performance is due to an increased turbulence in the system and mass transfer from the bulk solution to the surface of the immobilized P90 photocatalyst, as also mentioned by Argurio et al [ 49 ]. However, the flow velocity must be selected so that the immobilized catalyst film remains stable.…”

Natural-based coagulants/flocculants as sustainable market-valued products for industrial wastewater treatment: a review of recent developments

“…Several studies have investigated the coagulation/occulation inuencing parameters to acquire the most effective treatment. Karam et al (2021) examined the viability of applying coagulation/occulation process for real textile effluent decontamination with different dosages of FeCl 3 coagulant (0.25-1.5) g L −1 at pH (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11), rapid mixing (50-250) rpm for (1-5) min, slow mixing (10-50) rpm for (10-30) min and settling time min. The optimum treatment rates were achieved at pH 9, 150 rpm for 1 min rapid mixing, 30 rpm for 20 min slow mixing and settling period of 30 min.…”

“…Industrial effluents are considered as the primary source of water pollution and impurities due to their high chemical content and wide range of organic and inorganic contaminants. 1,2 The common industrial wastewater sources are presented in Fig. 1.…”

Efficient Adsorption of Tebuconazole in Aqueous Solution by Calcium Modified Water Hyacinth-Based Biochar: Adsorption Kinetics, Mechanism, and Feasibility

“…The current methods for removing micro-organic pollutants from water include biological treatment [8], photocatalytic oxidation [9,10], electrochemical degradation [11], and adsorption [12]. However, most of the existing methods have certain limitations, such as insufficient flexibility and high costs of application processing.…”