Treatment of Liquid and Gaseous Effluents by Advanced Catalytic Oxidation Processes

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Environmental Catalysis".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 3718

Special Issue Editors


E-Mail Website
Guest Editor
Department of Chemical Engineering; Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
Interests: wastewater treatment; gas stream treatment; homogeneous and heterogeneous Fenton and photo-Fenton catalysts; persulfate oxidation; catalytic wet peroxidation; combining advanced oxidation processes (AOPs) with biological degradation and/or coagulation/flocculation processes.

E-Mail Website
Guest Editor
LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
Interests: multifunctional reactors; membrane reactors; hybrid adsorption–reaction processes; CO2 capture and valorization; H2 production and purification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The treatment of liquid and gaseous effluents for the abatement of refractory, non-biodegradable, and/or toxic organic and inorganic pollutants and/or inactivation of pathogenic microorganisms, especially those resistant to antibiotics, are priorities nowadays, with the goals of minimizing their negative effects on the environment and preserving public health. Advanced oxidation processes (AOPs) are responsible for the partial or total elimination of these contaminants and microorganisms through their oxidation by the highly oxidative radicals that are formed. Such radicals are generated from different species, including hydrogen peroxide, oxygen, ozone, chlorine, and persulfate (among others), particularly through catalyzed processes or by the simple use of radiation. The application of such technologies has shown promise in the decontamination of liquid and gaseous effluents and the inactivation of bacteria and viruses. For this Special Issue of Catalysts, we encourage you to submit an original research article or review paper that focuses on any AOP and addresses at least one of the following issues:

  • abatement of organic pollutants in water/wastewater;
  • treatment of gas streams containing organic or inorganic contaminants;
  • application of AOPs in the disinfection of water/wastewater;
  • new catalysts or photocatalytic materials for the removal of pollutants;
  • catalyst or semiconductor materials for the inactivation of pathogenic and antibiotic-resistant microorganisms.

Dr. Carmen S. D. Rodrigues
Prof. Dr. Luis M. Madeira
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. Catalysts is an international peer-reviewed open access monthly 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 2700 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

  • advanced oxidation processes;
  • heterogeneous catalysis;
  • photocatalysis;
  • water/wastewater treatment;
  • gaseous effluent treatment;
  • removal of organic and inorganic pollutants;
  • disinfection.

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

12 pages, 1966 KiB  
Article
Evaluation of Heterogeneous Catalytic Ozonation for Micropollutants Removal from Wastewater: Application of a Pre-Industrial-Scale Unit
by Efthimia Kaprara, Savvina Psaltou, Maria Salapasidou, Stefanos Kalandaridis, Panagiota-Aikaterini Palasantza, Georgios Germanidis, Panagiotis Diamantopoulos, Manassis Mitrakas and Anastasios Zouboulis
Catalysts 2024, 14(4), 227; https://doi.org/10.3390/catal14040227 - 28 Mar 2024
Viewed by 610
Abstract
The present study evaluates the application of heterogeneous catalytic ozonation for the removal of micropollutants from wastewater effluent in a pre-industrial-scale unit, consisting of a post-filtration, an ozone dilution, a catalytic ozonation, and a final biological stabilization step. The important step of ozone [...] Read more.
The present study evaluates the application of heterogeneous catalytic ozonation for the removal of micropollutants from wastewater effluent in a pre-industrial-scale unit, consisting of a post-filtration, an ozone dilution, a catalytic ozonation, and a final biological stabilization step. The important step of ozone dilution is optimized by the use of a hollow fiber membrane that minimizes the loss of ozone gas due to the transfer of ozone to the liquid phase mainly by diffusion. It is observed that the efficiency of this sub-system is maximized for the dead-end operation of the membrane and the introduction of ozone gas to the shell side and liquid phase to the lumen side of the membrane module. Under these conditions, the concentration of dissolved ozone is directly dependent on the ratio of ozone gas feed to the wastewater flow subjected to post-treatment. Regarding the removal of MPs, part of their degradation already takes place at this stage (i.e., during ozone dilution), while after the post-treatment of wastewater effluent in the catalytic ozonation bed, the MP degradation yield ranges from 35% up to complete removal, depending on the type and properties of the specific MP. The addition of a final biological filtration bed to the overall treatment unit significantly increased its performance, regarding the removal of MPs, enhancing it by an additional removal rate that can reach up to 30%. Full article
Show Figures

Figure 1

15 pages, 1486 KiB  
Article
UV/Vis-Based Persulphate Activation for p-Nitrophenol Degradation
by Valentin Dubois, Carmen S. D. Rodrigues, Ana S. P. Alves and Luis M. Madeira
Catalysts 2021, 11(4), 480; https://doi.org/10.3390/catal11040480 - 8 Apr 2021
Cited by 7 | Viewed by 2380
Abstract
In the present work, the degradation of p-nitrophenol (PNP) and its mineralization by a UV/Vis-based persulphate activation process was investigated. Firstly, a screening of processes as direct photolysis, persulphate alone and persulphate activated by radiation was performed. The incidence of radiation demonstrated [...] Read more.
In the present work, the degradation of p-nitrophenol (PNP) and its mineralization by a UV/Vis-based persulphate activation process was investigated. Firstly, a screening of processes as direct photolysis, persulphate alone and persulphate activated by radiation was performed. The incidence of radiation demonstrated to have an important role in the oxidant activation, allowing to achieve the highest PNP and total organic carbon (TOC) removals. The maximum PNP oxidation (100%) and mineralization (61.6%)—both after 2 h of reaction time—were reached when using T = 70 °C, (S2O82−) = 6.4 g/L and I = 500 W/m2. The influence of radiation type (ultraviolet/visible, visible or simulated solar light) was also evaluated, being found that the source with the highest emission of ultraviolet radiation (UV/visible) allowed to achieve the best oxidation efficiency; however, solar radiation also reached very-good performance. According to quenching experiments, the sulphate radical is key in the activated persulphate oxidation process, but the hydroxyl radical also plays an important role. Full article
Show Figures

Graphical abstract

Back to TopTop