Is cavitation a truly sensible choice for intensifying photocatalytic oxidation processes? – Implications on phenol degradation using ZnO photocatalysts

Sarvothaman, Varaha Prasad; Velisoju, Vijay Kumar; Subburaj, Janardhanraj; Panithasan, Mebin Samuel; Kulkarni, Shekhar R.; Castaño, Pedro; Turner, James; Guida, Paolo; Roberts, William L.; Nagarajan, Sanjay

doi:10.1016/j.ultsonch.2023.106548

Cited by 16 publications

(5 citation statements)

References 64 publications

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“…The sheer intensity of HC, in addition to its oxidizing radicals production, has been harnessed previously for biomass 135 and solubilizing chemical oxygen demand (COD) even at typical industrial flow rates. 136 It is hence possible to harness HC on its own or in synergy 137–139 with other AOPs such as photocatalysis to eliminate the toxicity associated with microplastics in water, particularly in remote areas.…”

Section: Discussionmentioning

confidence: 99%

Microplastic emerging pollutants – impact on microbiological diversity, diarrhea, antibiotic resistance, and bioremediation

Uthra,

Chitra,

Damodharan

et al. 2023

Environ. Sci.: Adv.

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Section: Discussionmentioning

confidence: 99%

Microplastic emerging pollutants – impact on microbiological diversity, diarrhea, antibiotic resistance, and bioremediation

Uthra,

Chitra,

Damodharan

et al. 2023

Environ. Sci.: Adv.

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“…The PPLB approach has been employed by Nogueira et al [15] and Fedorov et al [14] to conduct three-dimensional simulations of collapsing cavities. In a recent study conducted by Sarvothaman et al [37], comprehensive three-dimensional computational fluid dynamics simulations were employed, utilizing the volume-of-fluid approach. The primary objective of this investigation was to gain insights into the impact of adjacent surfaces, whether rigid or flexible, on the phenomenon of cavity collapse [9].…”

Section: Data-driven Modelsmentioning

confidence: 99%

Hydrodynamic Cavitation and Advanced Oxidation for Enhanced Degradation of Persistent Organic Pollutants: A Review

Yeneneh,

Al Balushi,

Jafary

et al. 2024

Sustainability

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Water pollution has become a major environmental menace due to municipal and industrial effluents discharged into water bodies. Several processes have been devised for the treatment and disposal of wastewater and sludge. Yet, most of the conventional technologies do not meet the requirements of sustainability as they impose a higher load on the environment in terms of resource depletion and toxic waste generation. Recently, sustainable innovative technologies, like hydrodynamic cavitation (HC), have emerged as energy-efficient methods, which can enhance the conventional wastewater treatment processes. HC is a very effective technique for the intensification of processes, like aeration, activated sludge treatment, and anaerobic digestion processes in conventional wastewater treatment plants, particularly for the enhanced degradation of persistent pollutants. On the other hand, advanced oxidation is a proven enhancement method for wastewater treatment. This review provides a comprehensive overview of recently published literature on the application of HC for the treatment of persistent organic pollutants. The potential synergistic impact of HC coupled with advanced oxidation and alternative pre-treatment methods was also reviewed in this study. Moreover, an overview of the present state of model-based research work for HC reactors and a feasibility analysis of various advanced oxidation process is also covered. Options for the pilot-to-large scale implementation of HC and advanced oxidation technologies to ensure the better sustainability of wastewater treatment plants are recommended.

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“…An analysis of TOC in the treated water confirmed the successful degradation of xenobiotic molecules, indicating the potential for reusing the treated water. Sarvothaman et al [99], in their work, investigated the efficiency of different AOPs, a cavitation-mediated pre-treatment of ZnO, and cavitation photocatalysis peroxide-based hybrid processes. The pre-treatment method resulted in a >25% enhancement in phenol oxidation compared to conventional ZnO photocatalysis alone.…”

Section: Photocatalysismentioning

confidence: 99%

Advancing Wastewater Treatment: A Comparative Study of Photocatalysis, Sonophotolysis, and Sonophotocatalysis for Organics Removal

Bognár,

Jovanović,

Despotović

et al. 2024

Processes

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Clear and sanitarily adequate water scarcity is one of the greatest problems of modern society. Continuous population growth, rising organics concentrations, and common non-efficient wastewater treatment technologies add to the seriousness of this issue. The employment of various advanced oxidation processes (AOPs) in water treatment is becoming more widespread. In this review, the state-of-the-art application of three AOPs is discussed in detail: photocatalysis, sonophotolysis, and sonophotocatalysis. Photocatalysis utilizes semiconductor photocatalysts to degrade organic pollutants under light irradiation. Sonophotolysis combines ultrasound and photolysis to generate reactive radicals, enhancing the degradation of organic pollutants. Sonophotocatalysis synergistically combines ultrasound with photocatalysis, resulting in improved degradation efficiency compared to individual processes. By studying this paper, readers will get an insight into the latest published data regarding the above-mentioned processes from the last 10 years. Different factors are compared and discussed, such as degradation efficiency, reaction kinetics, catalyst type, ultrasound frequency, or water matrix effects on process performance. In addition, the economic aspects of sonophotolysis, photocatalysis, and sonophotocatalysis will be also analyzed and compared to other processes. Also, the future research directions and potential applications of these AOPs in wastewater treatment will be highlighted. This review offers invaluable insights into the selection and optimization of AOPs.

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Is cavitation a truly sensible choice for intensifying photocatalytic oxidation processes? – Implications on phenol degradation using ZnO photocatalysts

Cited by 16 publications

References 64 publications

Microplastic emerging pollutants – impact on microbiological diversity, diarrhea, antibiotic resistance, and bioremediation

Microplastic emerging pollutants – impact on microbiological diversity, diarrhea, antibiotic resistance, and bioremediation

Hydrodynamic Cavitation and Advanced Oxidation for Enhanced Degradation of Persistent Organic Pollutants: A Review

Advancing Wastewater Treatment: A Comparative Study of Photocatalysis, Sonophotolysis, and Sonophotocatalysis for Organics Removal

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