Nano-Catalysts in Ozone-Based Advanced Oxidation Processes for Wastewater Treatment

Dang, Thi Thom; Manh, Van; Trinh, Van Tuyen

doi:10.1007/s40726-020-00147-3

Cited by 28 publications

(8 citation statements)

References 65 publications

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“…These hydroxyl radicals exhibit exceptional oxidative properties, resulting in disintegration of the complex naphthalene compounds present in wastewater. 43 Consequently, the COD of the wastewater was reduced and its biodegradability was significantly enhanced. However, the direct oxidation of ozone suffers from slow decomposition rates, which impede its efficacy.…”

Section: Chemical Methodsmentioning

confidence: 99%

“…Ozone oxidation has emerged as a potent strategy for treating H‐acid wastewater owing to its ability to generate hydroxyl radicals in an alkaline solution environment. These hydroxyl radicals exhibit exceptional oxidative properties, resulting in disintegration of the complex naphthalene compounds present in wastewater 43 . Consequently, the COD of the wastewater was reduced and its biodegradability was significantly enhanced.…”

Section: H‐acid Wastewater Treatment Technologymentioning

confidence: 99%

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Recent advances in treatment technology of wastewater containing H‐acid: a mini‐review

Cao,

Hong,

Zhang

2023

J of Chemical Tech & Biotech

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H‐acid, a prevalent pollutant in dyeing wastewater, is primarily utilized in the pharmaceutical and textile industries. However, H‐acid treatment remains a challenge because of its high concentration, degradation resistance, and poor biodegradability. This review examines the principles, characteristics, advantages, and disadvantages of the most recently developed advanced practical H‐acid treatment technologies. Furthermore, this review analyzes the existing issues within these methods and explores potential future development trends.This article is protected by copyright. All rights reserved.

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Section: Chemical Methodsmentioning

confidence: 99%

Section: H‐acid Wastewater Treatment Technologymentioning

confidence: 99%

Recent advances in treatment technology of wastewater containing H‐acid: a mini‐review

Cao,

Hong,

Zhang

2023

J of Chemical Tech & Biotech

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“…Using the standards idometric method, the inlet ozone dosage supplied to the reactor was calculated 32 . For a predetermined amount of time, gas bottles containing a 2 % KI solution were filled with the O3 gas being generated by the ozone generator (30 min).…”

Section: Ozone Dose Analysismentioning

confidence: 99%

Photocatalytic Ozonation-Electroflucculation Process for the Treatment of pharmaceutical wastewater using modified bentonite /UV/TiO2/ZnO

Jamil

2024

Preprint

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The study aims to investigate the effectiveness of photocatalyst (Clay/UV/TiO2/ZnO) for antibiotic removal from real pharmaceutical wastewater by Combined UV, Catalytic Ozonation-Electroflucculation process. The experiments were performed in a modified hybrid batch reactor with UV-C lamp. The effect of four operational variables such as the applied voltage of (5–15 V), ozone dose of (0.2–0.8 mg/min), pH (5–10), and catalyst dose (0.5–1.5 g/L) on turbidity and COD removal was investigated. Removal efficiencies of antibiotics (carbamazepine and amoxicillin) were evaluated and compared with ozonation (O3), photocatalytic Ozonation (UV/O3), Electroflucculation (EF)/UV, catalytic ozonation/UV, and Hybrid O3/catalytic ozonation/UV/EF. The results showed that the modified hybrid process with UV irradiations provided the highest removal efficiency of 86.9% for COD, and turbidity of 81.66% under optimized conditions of (DC volts of 10 V; catalyst dose of 1 g/L, and ozone dose of 0.6mg/min). The pharmaceuticals removal obtained for amoxicillin was 100% and 95% for carbamazepine. The detailed mechanism was also explored for better understanding of each process. The combined process was effective for treating pharmaceutical wastewater. Therefore, it was suggested that the novel photocatalyst and hybrid system can be used for treating real effluents in large scale and to meet UN sustainability goals.

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“…Гидроксильные радикалы могут образовываться в воде под действием ультрафиолетового облучения и/или при ультразвуковом воздействии. Для интенсификации процессов образования гидроксильных радикалов к водной среде, содержащей озон, могут добавляться пероксид водорода, активированный уголь и различные катализаторы (ионы металлов переменной валентности (Fe 2+ , Cu 2+ , Mn 2+ , Со 2+ , Cr 2+ , Ag + ) и TiO2 [85,86].…”

Section: усовершенствованные окислительные процессы на основе озониро...unclassified

New Composite Materials and Processes for Chemical, Physico-Chemical and Biochemical Technologies of Water Purification

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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In traditional methods of water purification, the use of chemical reagents leads to the appearance of toxic by-products and wastes that require complex energy-consumption processing technologies. In accordance with the principles of sustainable development and “green” technologies, a significant revision of existing water treatment methods is required. The review highlights the main trends of innovative development of water purification and disinfection technologies. Modifications of water treatment agents (flocculants, sorbents, membranes) by integration of nanoparticles, environmentally compatible materials and “smart” composites into traditional structures are described. The use of composite nanoparticles is promising, particularly the use of particles with the “magnetic core – shell” structure, in which functional elements are attached to the surface, that provide the selective capture of contaminants, including pathogenic microorganisms. The existence of the magnetic core makes it possible to manipulate particles by the applied magnetic field, which is important for their complete extraction from the water upon completion of their functions. The use of new composite flocculants containing inorganic and organic components capable of ensuring highly effective capture of contaminants from the water, significantly reduces the volumes of flocculants and generated sludges and therefore allows to reduce the cost of the sludges processing and the harm of their disposal in the environment. New carbon nanostructures and natural polymers have an important role to play. In the new generation membranes, the disperse nanoparticles may provide antibacterial and photocatalytic properties, resulting in the high efficiency of disinfection and purification. A novel trend is the development of hybrid structures of coagulants and membranes with the properties which are regulated by the external stimulus, which are temperature, pH, light, electric, magnetic and electromagnetic fields. The use of such «smart» structures will increase the purification efficiency, reduce energy consumption and water purification waste volumes, due to the decrease in membranes fouling. The use of biopolymers and composites based on plant raw materials for the water purification is attractive due to their natural decontamination under the influence of the components of the environment, such as air, soil micro-organisms and sunlight, but also due to the absence of the secondary pollution. Among innovative chemical water treatment technologies Advanced Oxidation Processes play an important role, in particular, by involving electromagnetic fields and ultrasonic activation. By these methods, harmful organic impurities and pathogens are destroyed without the intensive use of chemicals or the production of toxic by-products. The integration of biochemical wastewater treatment with a microalgae growing system can become a promising waste-free, cost-effective "green" technology.

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Nano-Catalysts in Ozone-Based Advanced Oxidation Processes for Wastewater Treatment

Cited by 28 publications

References 65 publications

Recent advances in treatment technology of wastewater containing H‐acid: a mini‐review

Recent advances in treatment technology of wastewater containing H‐acid: a mini‐review

Photocatalytic Ozonation-Electroflucculation Process for the Treatment of pharmaceutical wastewater using modified bentonite /UV/TiO2/ZnO

New Composite Materials and Processes for Chemical, Physico-Chemical and Biochemical Technologies of Water Purification

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