Remediation of Textile Wastewater by Ozonation

Gupta, Astha; Khan, Suhail Ayoub; Khan, Tabrez Alam

doi:10.1002/9781119818915.ch11

Cited by 6 publications

(4 citation statements)

References 46 publications

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“…Thence, the presence of CR in the water bodies results in hazardous diseases such as gene mutation, diarrhea, eye stimulator, cancer, drowsiness, vomiting, blood clotting, and lung and kidney infections (Ghorai et al 2013). Subsequently, water remediation techniques have been fostered to face such prejudicial contaminants such as catalysis (Benmaati et al 2022;Hosny et al 2022), photocatalysis (Cheng et al 2022b;Gomaa et al 2022b;Motawea et al 2022), coagulation (Kristianto et al 2019;Kristianto et al 2020), membranes (Radoor et al 2020;Tan et al 2021), filtration, ozonation (Gerulová et al 2021;Gupta et al 2021) and adsorption (Abukhadra et al 2019;Diab et al 2020;Eltaweil et al 2021;Mokhtar et al 2022;Shaban et al 2018b). The latest one is the most convenient mode as it is a simple and easy process, inexpensive, and diminishes the formation of byproducts (Cheng et al 2021;Cheng et al 2022a;Diab et al 2020;Omer et al 2021b).…”

Section: Introductionmentioning

confidence: 99%

Sandwich-like construction of a new aminated chitosan Schiff base for efficient removal of Congo red

et al. 2023

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Herein, a novel sandwich-like α-ketoglutaric acid Schiff base-aminated chitosan composite (α-kGl-AmCsSB) was fabricated by reacting α-ketoglutaric acid and aminated chitosan. The as-fabricated α-kGl-AmCsSB was inspected by diversified characterization tools to determine its morphology, surface charge, and chemical composition as well as define the linkage pathway between α-kGl and AmCs. The SEM images demonstrated a spongy network of AmCs with interconnected pores structure which turned to a quite rough surface due to the linkage of α-kGl to the free amine groups of AmCs. Notably, the XPS and FTIR spectra suggested the linkage of α-kGl to the amine group of AmCs. The experimental results implied the superior adsorption efficiency of Congo red (CR) onto α-kGl-AmCsSB since the maximum adsorption capacity (qmax) reached 434.78 mg/g at 25 °C and pH 3. Based on kinetics data, the adsorption of CR on α-kGl-AmCsSB followed pseudo-second-order model. Furthermore, D-R model infers that the CR adsorption onto α-kGl-AmCsSB occurred via physical interactions since the E value < 8 kJ/mol. The recyclability test was implemented for five cycles with R% > 72%. More importantly, the adsorption mechanism of CR onto α-kGl-AmCsSB was proposed and discussed. Ultimately, the novel sandwich-like α-kGl-AmCsSB exhibited advanced adsorption performance toward CR along with excellent reusability. Based on these results, we recommend more modifications on α-kGl-AmCsSB for exploiting its remarkable advantages and applying it on a large scale.

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Section: Introductionmentioning

confidence: 99%

Sandwich-like construction of a new aminated chitosan Schiff base for efficient removal of Congo red

et al. 2023

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“…In the recent past, various research strategies/technologies have been adopted for the remediation of industrial wastewater and dye-contaminated water bodies, including plasma-based advanced oxidation process [6], ozonation [7], membrane filtration [8], bioelectrochemical system [9], heterogeneous Fenton catalysts [10], ion exchange removal [11], adsorption, and electrocoagulation [12]. Among these, the photocatalysis process mediated by metal oxide semiconductors is an environmentally safe process that simulates the natural photosynthesis process to speed up the chemical reactions requiring light [13].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Methyl Green Dye Mediated by Pure and Mn-Doped Zinc Oxide Nanoparticles under Solar Light Irradiation

Akram

Fatima

Almohaimeed

et al. 2023

Adsorption Science & Technology

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Herein this study, pure and manganese- (Mn-) doped ZnO (2 wt. %) nanoparticles have been synthesized using the chemical precipitation method and characterized for the photodegradation of methyl green (MG) pollutant dye under natural sunlight. The structural analysis via XRD patterns has revealed that both intrinsic and Mn-doped ZnO (2 wt. %) samples have hexagonal wurtzite structures with appropriate phase purity, clearly indicating the absence of any external impurity. The incorporation of Mn in the host ZnO lattice has decreased the crystallite size (21.10 → 18.76 nm), and nanoparticle-type surface features with sizes in the 50–100 nm range have been observed through FESEM-based surface morphological studies. Both aforementioned observations have merit in providing more active area and a high surface area to volume ratio for photocatalytic reaction. The investigation of photophysical properties indicates that in Mn-doped ZnO nanoparticles, the absorption peak is blue-shifted by 5 nm (365 → 360 nm), due to the widening of the bandgap. The degradation kinetics of MG dye follow the pseudo-second-order kinetics, and the degradation efficiency has been observed to be 62.78% mediated by pure ZnO and 66.44% by Mn-doped ZnO (2 wt. %) photocatalyst under 60 minutes of sunlight irradiation. Specifically, the rate of photocatalytic reaction (K) ~0.01792 min-1 and R 2 ~0.97992 has been achieved for pure ZnO, whereas slightly higher (K) ~0.02072 min-1 and R 2 ~0.97299 have been observed for Mn-doped ZnO, respectively. Conclusively, the synergistic interactions with multiple charge transfer pathways, improvement of e−/h+ pair charge separation, improved surface area, and efficient generation of hydroxyl radicals are supposed to be responsible for the highly efficient photocatalytic activity of the Mn–doped ZnO photocatalyst for MG dye.

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“…Many techniques are commonly used to treat contaminated waters, e.g., coagulation, flocculation, ozonation [ 3 ], etc. However, their efficiencies are often questioned due to the possible production of undesirable, or even more toxic and difficult to handle, secondary by-products [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Mesoporous SiC-Based Photocatalytic Membranes and Coatings for Water Treatment

et al. 2023

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Photocatalytically active silicon carbide (SiC)-based mesoporous layers (pore sizes between 5 and 30 nm) were synthesized from preceramic polymers (polymer-derived ceramic route) on the surface and inside the pores of conventional macroporous α-alumina supports. The hybrid membrane system obtained, coupling the separation and photocatalytical properties of SiC thin films, was characterized by different static and dynamic techniques, including gas and liquid permeation measurements. The photocatalytic activity was evaluated by considering the degradation efficiency of a model organic pollutant (methylene blue, MB) under UV light irradiation in both diffusion and permeation modes using SiC-coated macroporous supports. Specific degradation rates of 1.58 × 10−8 mol s−1 m−2 and 7.5 × 10−9 mol s−1 m−2 were obtained in diffusion and permeation modes, respectively. The performance of the new SiC/α-Al2O3 materials compares favorably to conventional TiO2-based photocatalytic membranes, taking advantage of the attractive physicochemical properties of SiC. The developed synthesis strategy yielded original photocatalytic SiC/α-Al2O3 composites with the possibility to couple the ultrafiltration SiC membrane top-layer with the SiC-functionalized (photocatalytic) macroporous support. Such SiC-based materials and their rational associations on porous supports offer promising potential for the development of efficient photocatalytic membrane reactors and contactors for the continuous treatment of polluted waters.

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Remediation of Textile Wastewater by Ozonation

Cited by 6 publications

References 46 publications

Sandwich-like construction of a new aminated chitosan Schiff base for efficient removal of Congo red

Sandwich-like construction of a new aminated chitosan Schiff base for efficient removal of Congo red

Photocatalytic Degradation of Methyl Green Dye Mediated by Pure and Mn-Doped Zinc Oxide Nanoparticles under Solar Light Irradiation

Mesoporous SiC-Based Photocatalytic Membranes and Coatings for Water Treatment

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