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Advances of Photocatalytic Application in Water and Wastewater Treatment

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

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 2391

Special Issue Editors


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Guest Editor
Swiss Government Excellence Postdoctoral Scholar, Multi-Scale Robotics Lab (MSRL), Department of Mechanical and Process Engineering, Swiss Federal Institute of Technology in Zürich (ETH Zurich), Rämistrasse 101, 8092 Zürich, Switzerland
Interests: advanced water and wastewater treatment; emerging contaminants; environmental nanotechnology; advanced oxidation processes; photocatalysis; electrochemical processes

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Guest Editor
Environmental Research Institute, National University of Singapore, Singapore, Singapore
Interests: emerging contaminants; target and nontarget analysis; photodegradation; dissolved organic matter; degradation byproducts identification; enzymatic degradation; wastewater treatment and wastewater proteomics

Special Issue Information

Dear Colleagues,

Photocatalytic advanced oxidation processes for treating water and wastewater have been the subject of extensive research and technological advancements over the past three decades for their potential of being a low-cost, environmentally friendly, and sustainable approach. The major challenges restraining the commercialization of this technology are the low photoconversion efficiency, the cost associated with the UV source, post-recovery of photocatalysts, and the photocatalytic efficiency towards the degradation of emerging, recalcitrant contaminants. Research efforts are being made to develop novel catalytic materials with broader light absorption to utilize the sunlight effectively. Development of the hybrid catalytic materials for the advanced hybrid oxidation of contaminants is also gaining much attention due to the enhancement in reaction kinetics. The integration of photocatalysis with other conventional or advanced processes can complement each other for catalyst recovery, improved treatment efficiency and economic viability.

This Special Issue focuses on recent progress and trends in the development of engineered-photocatalytic nanomaterials, advancements in their immobilization and supports, photocatalytic reactor configurations, process optimization, its application in the removal of persistent organic pollutants including degradation byproducts from water and wastewater (domestic and industrial) and the combination of photocatalysis with other treatment technologies. We invite manuscript submissions of original research studies or review articles encompassing the recent findings and advancements in photocatalytic advanced oxidation processes for this Special Issue in Water.

Dr. Divyapriya Govindaraj
Dr. Sanjeeb Mohapatra
Guest Editors

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

  • novel photocatalytic semiconductor materials (synthesis, characterization, applications)
  • photocatalyst immobilization and supports
  • hybrid processes (sono-photocatalysis, photo-electrocatalysis, photocatalytic-fenton, photo-electro-fenton, etc.)
  • photocatalytic reactor systems (lab and field-scale trials), including the hybrid reactors
  • combination of photocatalysis with other treatment processes (biological, membrane, ozonation etc.)
  • photocatalytic degradation of emerging contaminants and disinfection in water
  • photocatalytic treatment and process optimization of domestic and industrial effluents
  • kinetics and modelling
  • fate of photocatalysts in wastewater treatment plants
  • photodegradation byproducts identification, transformation pathways and toxicity
  • role of dissolved and particulate organic matter in photocatalysis
  • economics of the photocatalytic processes in the treatment of water and wastewater

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Published Papers (1 paper)

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Research

17 pages, 4520 KiB  
Article
Removal of Carbamazepine in Aqueous Solution by TiO2 Ceramic Photo-Catalyst under Simulated Solar Light: Kinetics, Effects of Environmental Factors and Degradation Pathways
by Trinh Hoang Nghia, Vu Toan Khanh, Cam Tu Vu, Nguyen Thi Kieu Oanh, Nguyen Thi Van Anh, Le Hong Luyen, Nobuaki Negishi, Sylvain Ouillon and Bui Van Hoi
Water 2023, 15(8), 1583; https://doi.org/10.3390/w15081583 - 18 Apr 2023
Cited by 6 | Viewed by 1616
Abstract
Current research on the photocatalytic activity of TiO2 mainly focuses on its nano- or micro-particle forms, which are difficult to recycle and apply in real engineering applications. This study aims to apply a small pilot of TiO2 in the ceramic form [...] Read more.
Current research on the photocatalytic activity of TiO2 mainly focuses on its nano- or micro-particle forms, which are difficult to recycle and apply in real engineering applications. This study aims to apply a small pilot of TiO2 in the ceramic form to remove carbamazepine (CBZ) from an aqueous solution under simulated sunlight. A high removal efficiency up to >99% was shown in a 5 mg L−1 CBZ solution after 6 h of irradiation with a total energy of 150.92 kJ. The kinetic degradation was not affected in an alkaline solution (at pH 7, pH 10, and pH 13) but was faster under acidic conditions (pH 2) in which CBZ existed in the protonated form. The presence of NO3 (10–50 mg L−1) slightly affected the photodegradation of CBZ while humic acid significantly reduced the photocatalytic activity. In addition, the presence of major ions in water also had a negative effect at concentrations between 10 and 50 mg L−1. The MS/MS was used to identify the transformation products of CBZ, and a possible degradation mechanism was proposed. The toxicity of CBZ and the by-products was primarily evaluated. The results showed that TiO2 ceramics show high reusability and stability with a photocatalytic performance of >95% and a mass loss of <5% after 90 degradation cycles. Full article
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