Photocatalysis (TiO2/Solar) in Water and Wastewater Treatment

2019 ◽  
pp. 171-199
Author(s):  
Nurul Aiin Ab Aziz ◽  
Puganeshwary Palaniandy
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Organic Contaminants ◽  
Advanced Oxidation ◽  
Heterogeneous Photocatalysis ◽  
Complete Oxidation ◽  
Water And Wastewater Treatment ◽  
Oxidation Processes ◽  
Process Characteristics ◽  
Water And Wastewater

Advanced oxidation processes (AOPs) have gained growing importance for the removal of organic pollutants from water. Heterogeneous photocatalysis has been rapidly expanding for water treatment. This approach has economic and sustainability advantages compared with other processes. The main advantage of this process is its capability to gain complete oxidation or mineralization of organic contaminants at conditions of near ambient temperature and pressure. This chapter aims to review the mechanism involved in this process, characteristics of semiconductor photocatalyst, difference between suspended and immobilized photocatalyst system, comparison between the use of natural sunlight and commercial lamp, also the reactor involved. Potential advantages and limitations, as well as the application of photocatalysis in water and wastewater are also discussed.

Evaluation of advanced oxidation processes for water and wastewater treatment – A critical review

2018 ◽  
Vol 139 ◽  
pp. 118-131 ◽  
Author(s):  
David B. Miklos ◽  
Christian Remy ◽  
Martin Jekel ◽  
Karl G. Linden ◽  
Jörg E. Drewes ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Critical Review ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Water And Wastewater Treatment ◽  
Oxidation Processes ◽  
Water And Wastewater

scholarly journals Assessment of Sulfate Radical-Based Advanced Oxidation Processes for Water and Wastewater Treatment: A Review

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1828 ◽  
Author(s):  
Sonia Guerra-Rodríguez ◽  
Encarnación Rodríguez ◽  
Devendra Singh ◽  
Jorge Rodríguez-Chueca
Keyword(s):  
Wastewater Treatment ◽  
Thermal Activation ◽  
Advanced Oxidation Processes ◽  
State Of The Art ◽  
Advanced Oxidation ◽  
Oxidation Potential ◽  
Water And Wastewater Treatment ◽  
Widespread Application ◽  
Oxidation Processes ◽  
Water And Wastewater

High oxidation potential as well as other advantages over other tertiary wastewater treatments have led in recent years to a focus on the development of advanced oxidation processes based on sulfate radicals (SR-AOPs). These radicals can be generated from peroxymonosulfate (PMS) and persulfate (PS) through various activation methods such as catalytic, radiation or thermal activation. This review manuscript aims to provide a state-of-the-art overview of the different methods for PS and PMS activaton, as well as the different applications of this technology in the field of water and wastewater treatment. Although its most widespread application is the elimination of micropollutants, its use for the disinfection of wastewater is gaining increasing interest. In addition, the possibility of combining this technology with ultrafiltration membranes to improve the water quality and lifespan of the membranes has also been discussed. Finally, a brief economic analysis of this technology has been undertaken and the different attempts made to implement it at full-scale have been summarized. As a result, this review tries to be useful for all those people working in that area.

Advanced Oxidation Processes for Water and Wastewater Treatment

2019 ◽  
pp. 46-69 ◽  
Author(s):  
Ahmed Hisham Hilles ◽  
Salem S. Abu Amr ◽  
Hamidi Abdul Aziz ◽  
Mohammed J. K. Bashir
Keyword(s):  
Hydrogen Peroxide ◽  
Wastewater Treatment ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Fenton Oxidation ◽  
Water And Wastewater Treatment ◽  
Oxidation Processes ◽  
Water And Wastewater ◽  
Persulfate Activation ◽  
Pre Treatment

Advanced oxidation processes (AOPs) have recently received attraction for treatment of different wastewaters. AOPs have an ability to oxidize a high quantity of refractory organic matters, traceable organic, or to increase wastewater biodegradability as a pre-treatment prior to an ensuing biological treatment. In this chapter, the fundamental mechanisms of different AOPs such as ozonation, hydrogen peroxide, UV, persulfate, and Fenton oxidation are summarized. The combination of different oxidation processes such as O3/H2O2, O3/UV, O3/Fenton+, O3/persulfate are evaluated. Several persulfate activation techniques are also summarized.

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