scholarly journals Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

2021 ◽  
Vol 11 (18) ◽  
pp. 8458
Author(s):  
Domenico Leonello ◽  
Murilo Alexandre Fendrich ◽  
Francesco Parrino ◽  
Nainesh Patel ◽  
Michele Orlandi ◽  
...  
Keyword(s):  
Large Scale ◽  
Advanced Oxidation Processes ◽  
Emerging Contaminants ◽  
New Technologies ◽  
Advanced Oxidation ◽  
Research Activity ◽  
Visible Radiation ◽  
Oxidation Processes ◽  
Uv Visible ◽  
Contamination Problem

PFAS substances, which have been under investigation in recent years, are certainly some of the most critical emerging contaminants. Their presence in drinking water, correlated with diseases, is consistently being confirmed by scientific studies in the academic and health sectors. With the aim of developing new technologies to mitigate the water contamination problem, research activity based on advanced oxidation processes for PFAS dealkylation and subsequent mineralization is active. While UV radiation could be directly employed for decontamination, there are nevertheless considerable problems regarding its use, even from a large-scale perspective. In contrast, the use of cheap, robust, and green photocatalytic materials active under near UV-visible radiation shows interesting prospects. In this paper we take stock of the health problems related to PFAS, and then provide an update on strategies based on the use of photocatalysts and the latest findings regarding reaction mechanisms. Finally, we detail some brief considerations in relation to the economic aspects of possible solutions.

Advanced Oxidation Processes for Wastewater Remediation: Fundamental Concepts to Recent Advances

2021 ◽  
pp. 37-86
Keyword(s):  
Water Treatment ◽  
Organic Pollutants ◽  
Large Scale ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Potential ◽  
Wastewater Remediation ◽  
Oxidation Processes ◽  
Sludge Disposal ◽  
Different Types

Industrialization and modernization in recent times have led to a water crisis across the world. Conventional methods of water treatment like physical, chemical and biological methods which comprise of many commonly used techniques like membrane separation, adsorption, chemical treatment etc. have been in use for many decades. However, problems like sludge disposal, high operating costs etc. have led to increased focus on Advanced Oxidation Processes (AOPs) as alternative treatment methods. AOPs basically involve reactions relying on the high oxidation potential of the hydroxyl (OH•) free radical. They have the potential to efficiently treat various toxic, organic pollutants and complete degradation of contaminants (mineralization) of emerging concern. Many different types of homogenous as well as heterogenous AOPs have been studied viz: UV/H2O2, Fenton, Photo-Fenton, Sonolysis, Photocatalysis etc. for treatment of a wide variety of organic pollutants. Different AOPs are suitable for different types of wastewater and hence proper selection of the right technique for a particular type of pollutant is required. The inherent advantages offered by AOPs like elimination of sludge disposal problems, operability under mild conditions, ability to harness sunlight, non selective nature (ability to degrade all organic and microbial contamination) etc. have made it one of the most actively researched areas in recent times for wastewater treatment. Despite the benefits and intense research, commercial applicability of AOPs as a practical technique for treating wastewater on a large scale is still far from satisfactory. Nevertheless, positive results in lab scale and pilot plant studies make them a promising water treatment technique for the future. In the present chapter, an attempt has been made to discuss all aspects of AOPs beginning with the fundamental concepts, classification, underlying mechanism, comparison, commercialization to the latest developments in AOPs.

Advanced Oxidation Processes for Wastewater Remediation: Fundamental Concepts to Recent Advances

2021 ◽  
pp. 37-86
Keyword(s):  
Water Treatment ◽  
Organic Pollutants ◽  
Large Scale ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Potential ◽  
Wastewater Remediation ◽  
Oxidation Processes ◽  
Sludge Disposal ◽  
Different Types

Industrialization and modernization in recent times have led to a water crisis across the world. Conventional methods of water treatment like physical, chemical and biological methods which comprise of many commonly used techniques like membrane separation, adsorption, chemical treatment etc. have been in use for many decades. However, problems like sludge disposal, high operating costs etc. have led to increased focus on Advanced Oxidation Processes (AOPs) as alternative treatment methods. AOPs basically involve reactions relying on the high oxidation potential of the hydroxyl (OH•) free radical. They have the potential to efficiently treat various toxic, organic pollutants and complete degradation of contaminants (mineralization) of emerging concern. Many different types of homogenous as well as heterogenous AOPs have been studied viz: UV/H2O2, Fenton, Photo-Fenton, Sonolysis, Photocatalysis etc. for treatment of a wide variety of organic pollutants. Different AOPs are suitable for different types of wastewater and hence proper selection of the right technique for a particular type of pollutant is required. The inherent advantages offered by AOPs like elimination of sludge disposal problems, operability under mild conditions, ability to harness sunlight, non selective nature (ability to degrade all organic and microbial contamination) etc. have made it one of the most actively researched areas in recent times for wastewater treatment. Despite the benefits and intense research, commercial applicability of AOPs as a practical technique for treating wastewater on a large scale is still far from satisfactory. Nevertheless, positive results in lab scale and pilot plant studies make them a promising water treatment technique for the future. In the present chapter, an attempt has been made to discuss all aspects of AOPs beginning with the fundamental concepts, classification, underlying mechanism, comparison, commercialization to the latest developments in AOPs.

A Critical Evaluation of Advanced Oxidation Processes for Emerging Contaminants Removal

2017 ◽  
Vol 4 (1) ◽  
pp. 283-302 ◽  
Author(s):  
Sara Ann Fast ◽  
Veera Gnaneswar Gude ◽  
Dennis D. Truax ◽  
James Martin ◽  
Benjamin S. Magbanua
Keyword(s):  
Advanced Oxidation Processes ◽  
Emerging Contaminants ◽  
Critical Evaluation ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
Contaminants Removal

scholarly journals Strategies for selecting indicator compounds to assess attenuation of emerging contaminants during UV advanced oxidation processes

2019 ◽  
Vol 166 ◽  
pp. 115030 ◽  
Author(s):  
Hye-Weon Yu ◽  
Minkyu Park ◽  
Shimin Wu ◽  
Israel Jesus Lopez ◽  
Weikang Ji ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Emerging Contaminants ◽  
Advanced Oxidation ◽  
Oxidation Processes

scholarly journals Advanced Oxidation Processes Based on Sulfate Radicals for Wastewater Treatment: Research Trends

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2445
Author(s):  
Lizeth Urán-Duque ◽  
Julio César Saldarriaga-Molina ◽  
Ainhoa Rubio-Clemente
Keyword(s):  
Advanced Oxidation Processes ◽  
Emerging Contaminants ◽  
Advanced Oxidation ◽  
Economic Benefits ◽  
Operating Costs ◽  
Pathogen Inactivation ◽  
Oxidation Processes ◽  
Oxidizing Power ◽  
Recent Trends ◽  
Treatment Research

In this work, the recent trends in the application of the sulfate radical-based advanced oxidation processes (SR-AOPs) for the treatment of wastewater polluted with emerging contaminants (ECs) and pathogenic load were systematically studied due to the high oxidizing power ascribed to these technologies. Additionally, because of the economic benefits and the synergies presented in terms of efficiency in ECs degradation and pathogen inactivation, the combination of the referred to AOPs and conventional treatments, including biological processes, was covered. Finally, the barriers and limitations related to the implementation of SR-AOPs were described, highlighting the still scarce full-scale implementation and the high operating-costs associated, especially when solar energy cannot be used in the oxidation systems.

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