scholarly journals Water Purification of Classical and Emerging Organic Pollutants: An Extensive Review

2021 ◽  
Vol 5 (3) ◽  
pp. 47
Author(s):  
Simona Somma ◽  
Ernesto Reverchon ◽  
Lucia Baldino

The main techniques used for organic pollutant removal from water are adsorption, reductive and oxidative processes, phytoremediation, bioremediation, separation by membranes and liquid–liquid extraction. In this review, strengths and weaknesses of the different purification techniques are discussed, with particular attention to the newest results published in the scientific literature. This study highlighted that adsorption is the most frequently used method for water purification, since it can balance high organic pollutants removal efficiency, it has the possibility to treat a large quantity of water in semi-continuous way and has acceptable costs.

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 556
Author(s):  
Alexandru Enesca

The organic pollutants removal by conventional methods (adsorption, coagulation, filtration, microorganism and enzymes) showed important limitation due to the reluctance of these molecules. An alternative to this issue is represented by the photocatalytic technology considered as an advanced oxidation process (AOP). The photoreactors design and concepts vary based on the working regime (static or dynamic), photocatalyst morphology (powders or bulk) and volume. This mini-review aims to provide specific guidelines on the correlations between the photoreactor concept characteristics (working regime, volume and flow rate), irradiation scenarios (light spectra, irradiation period and intensity) and the photocatalytic process parameters (photocatalyst materials and dosage, pollutant type and concentration, pollutant removal efficiency and constant rate). The paper considers two main photoreactor geometries (cylindrical and rectangular) and analyses the influence of parameters optimization on the overall photocatalytic efficiency. Based on the systematic evaluation of the input data reported in the scientific papers, several perspectives regarding the photocatalytic reactors' optimization were included.


Author(s):  
Muhammad Raza Ul Mustafa ◽  
Tahir Haneef ◽  
Brenda Tan Pei Jian ◽  
Khamaruzaman Wan Yusof ◽  
Hifsa Khurshid

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