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Application of a Combined Adsorption−Ozonation Process for Phenolic Wastewater Treatment in a Continuous Fixed-Bed Reactor.

Authors :
Ferreiro, Cristian
de Luis, Ana
Villota, Natalia
Lomas, Jose María
Lombraña, José Ignacio
Camarero, Luis Miguel
Source :
Catalysts (2073-4344). Aug2021, Vol. 11 Issue 8, p1014. 1p.
Publication Year :
2021

Abstract

This work studied the removal of phenol from industrial effluents through catalytic ozonation in the presence of granular activated carbon in a continuous fixed-bed reactor. Phenol was chosen as model pollutant because of its environmental impact and high toxicity. Based on the evolution of total organic carbon (TOC) and phenol concentration, a kinetic model was proposed to study the effect of the operational variables on the combined adsorption–oxidation (Ad/Ox) process. The proposed three-phase model expressed the oxidation phenomena in the liquid and the adsorption and oxidation on the surface of the granular activated carbon in the form of two kinetic constants, k1 and k2 respectively. The interpretation of the constants allow to study the benefits and behaviour of the use of activated carbon during the ozonisation process under different conditions affecting adsorption, oxidation, and mass transfer. Additionally, the calculated kinetic parameters helped to explain the observed changes in treatment efficiency. The results showed that phenol would be completely removed at an effective contact time of 3.71 min, operating at an alkaline pH of 11.0 and an ozone gas concentration of 19.0 mg L−1. Under these conditions, a 97.0% decrease in the initial total organic carbon was observed. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20734344
Volume :
11
Issue :
8
Database :
Academic Search Index
Journal :
Catalysts (2073-4344)
Publication Type :
Academic Journal
Accession number :
152102524
Full Text :
https://doi.org/10.3390/catal11081014