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Photocatalytic Wastewater Treatment: Recent Advances and Prospects for Sustainable Clean...
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Photocatalytic Wastewater Treatment: Recent Advances and Prospects for Sustainable Clean Water Supply

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: 20 August 2024 | Viewed by 2146

Special Issue Editor

Dr. Hamid Rajabi

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, School of Engineering, University of Liverpool, Liverpool L69 3GH, UK
Interests: water and wastewater treatment; membrane separation: adsorption; gas separation; nanomaterial synthesis

Special Issue Information

Dear Colleagues,

Photocatalytic wastewater treatment emerges as an efficient, environmentally friendly, and adaptable solution to various water sources, making it a promising option for cleaning wastewater, yet is limited in terms of its affordable scalability. This Special Issue aims to cover a comprehensive range of topics within the domain of photocatalysis in treating wastewater. We believe that your expertise in this field would greatly enrich our Special Issue and contribute to the advancement of knowledge in this critical area. We encourage submissions that address, but are not limited to, the following themes:

  • Photocatalytic reactor designs and optimization;
  • Catalyst materials and their development;
  • Operational strategies and scale-up considerations;
  • Novel approaches and emerging technologies;
  • Assessment of environmental impact and sustainability;
  • Economic feasibility and cost effectiveness.

Your research on this topic has been particularly impactful, and we would be delighted if you could contribute a manuscript on this subject. Your unique insights and expertise would be invaluable in furthering the discussion on this important topic. The journal Water is a prestigious publication known for its commitment to rigorous peer review and high-quality research. Your participation in this Special Issue would not only enhance your academic profile but also contribute to the advancement of knowledge in the field. The deadline for manuscript submissions is August 2024. Please let us know if you would be interested in contributing, and we can provide further details on manuscript preparation and submission guidelines. We look forward to the possibility of working with you on this exciting project.

Dr. Hamid Rajabi
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • wastewater treatment
  • photocatalysis
  • reactor designs
  • sustainable clean water
  • catalyst materials

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Published Papers (2 papers)

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Research

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13 pages, 14176 KiB  
Article
A CFD Study on Optimization of Mass Transfer and Light Distribution in a Photocatalytic Reactor with Immobilized Photocatalyst on Spheres
by Qasim Jamil, Khush Bakhat Rana and Lev Matoh
Water 2024, 16(13), 1828; https://doi.org/10.3390/w16131828 - 27 Jun 2024
Viewed by 566
Abstract
This study explores the influence of flow velocity, sphere size, and inter-sphere distance on hydrodynamics and mass transfer in a photocatalytic reactor. The effects of two different light configurations on light distribution and degradation were also evaluated. A 2D computational fluid dynamics (CFD) [...] Read more.
This study explores the influence of flow velocity, sphere size, and inter-sphere distance on hydrodynamics and mass transfer in a photocatalytic reactor. The effects of two different light configurations on light distribution and degradation were also evaluated. A 2D computational fluid dynamics (CFD) model was developed to simulate the continuous flow photocatalytic reactor with TiO2-coated spheres and validated with experimental measurements by observing the degradation of methyl orange. The experimental setup consists of a tube containing an equal number of TiO2-coated glass spheres. The case with radiation from one wall shows a non-uniform light distribution compared with the case with radiation from both walls. The CFD simulations focused on analyzing the velocity streamlines and turbulence characteristics (turbulent kinetic energy (TKE) and turbulence dissipation rate (TDR)). These parameters showed significant variations in each studied case. The case with larger spheres reached the highest velocity of 38 m/s of the pollutant solution. The highest TKE and TDR values of 0.47 m2/s2 and 12.2 m2/s2, respectively, were also observed in the same case, indicating enhanced mixing and mass transfer to the catalyst surfaces, ultimately leading to a more efficient degradation process. The results show that an optimized design of photocatalytic reactors can significantly improve mass transfer and, thus, degradation efficiency. Full article
(This article belongs to the Special Issue Photocatalytic Wastewater Treatment: Recent Advances and Prospects for Sustainable Clean Water Supply)
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Review

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36 pages, 4168 KiB  
Review
In-Depth Photocatalytic Degradation Mechanism of the Extensively Used Dyes Malachite Green, Methylene Blue, Congo Red, and Rhodamine B via Covalent Organic Framework-Based Photocatalysts
by Abdul Haleem, Mohib Ullah, Saif ur Rehman, Afzal Shah, Muhammad Farooq, Tooba Saeed, Ishan Ullah and Hao Li
Water 2024, 16(11), 1588; https://doi.org/10.3390/w16111588 - 1 Jun 2024
Cited by 1 | Viewed by 1128
Abstract
Photocatalytic degradation technology has received much attention from researchers in the last few decades, due to its easy and cost-effective nature. A lot of review articles have been published on dyes via photocatalytic degradation, but most of the review articles lack a detailed [...] Read more.
Photocatalytic degradation technology has received much attention from researchers in the last few decades, due to its easy and cost-effective nature. A lot of review articles have been published on dyes via photocatalytic degradation, but most of the review articles lack a detailed and in-depth photocatalytic degradation mechanism of dyes. Numerous review articles are available on photocatalysis. Here, in this review article, we are mainly focused on the complete and in-depth photocatalytic degradation mechanism of four commonly used dyes such as Malachite Green, Methylene Blue, Congo Red and Rhodamine B, which will be highly useful for the new researchers that work on dyes’ photocatalytic degradation. Initially, various aspects of dyes have been included in this review article, comprehensively. The main focus was on the covalent organic framework-based photocatalysts for dyes’ photocatalytic degradation, due to their porous nature and various unique properties. Various synthesis routes and the photocatalytic performance of covalent organic frameworks and composite of covalent organic frameworks have been highlighted in this review article. In the last section of this review article, the main stimulus was the four mentioned dyes’ properties, uses, and toxicity, and the photocatalytic degradation mechanism through various paths into environmentally friendly and less-harmful compounds in the presence of photocatalysts. Factors effecting the photocatalytic degradation, economic cost, challenges and future aspects of photocatalytic technology were also included in this review article. This review article will be highly useful for those researchers that work on the photocatalytic degradation of various dyes and search for the complete degradation of complex dye molecules. Full article
(This article belongs to the Special Issue Photocatalytic Wastewater Treatment: Recent Advances and Prospects for Sustainable Clean Water Supply)
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