Treatment of Effluent Containing p-Cresol through an Advanced Oxidation Process in a Batch Reactor: Kinetic Optimization

Julierme G. C. Oliveira, Yana B. Brandão, Dinaldo C. Oliveira, Jailson R. Teodosio, Cristiane M. Moraes, Attilio Converti, Alessandro Alberto Casazza (), Leonie Asfora Sarubbo and Mohand Benachour
Additional contact information
Julierme G. C. Oliveira: Department of Chemical Engineering, Catholic University of Pernambuco (UNICAP), Rua do Príncipe, 526, Recife 50050-900, Brazil
Yana B. Brandão: Department of Engineering, Federal Rural University of Pernambuco (UFRPE), UACSA, Cabo de Santo Agostinho 54518-430, Brazil
Dinaldo C. Oliveira: Department of Chemical Engineering and Clinical Medicine, Federal University of Pernambuco (UFPE), Av. dos Economistas, s/n, Recife 50740-590, Brazil
Jailson R. Teodosio: Department of Chemical Engineering, Catholic University of Pernambuco (UNICAP), Rua do Príncipe, 526, Recife 50050-900, Brazil
Cristiane M. Moraes: Department of Chemical Engineering and Clinical Medicine, Federal University of Pernambuco (UFPE), Av. dos Economistas, s/n, Recife 50740-590, Brazil
Attilio Converti: Department of Civil, Chemical and Environmental Engineering, University of Genoa (UNIGE), I-16145 Genoa, Italy
Alessandro Alberto Casazza: Department of Civil, Chemical and Environmental Engineering, University of Genoa (UNIGE), I-16145 Genoa, Italy
Leonie Asfora Sarubbo: Department of Chemical Engineering, Catholic University of Pernambuco (UNICAP), Rua do Príncipe, 526, Recife 50050-900, Brazil
Mohand Benachour: Department of Chemical Engineering and Clinical Medicine, Federal University of Pernambuco (UFPE), Av. dos Economistas, s/n, Recife 50740-590, Brazil

Energies, 2023, vol. 16, issue 13, 1-23

Abstract: The present research is related to the study of p-cresol oxidation reaction in aqueous phase. Firstly, the conventional advanced oxidation process (AOP) in a lab-scale batch reactor was used, seeking to identify the most impacting process variables and then to propose an optimization approach for ensuring the complete p-cresol degradation and the highest total organic carbon (TOC) conversion. In the AOP with the use of hydrogen peroxide as the oxidizing agent, the oxidation reaction was optimized with the aid of a factorial design, and a maximum TOC conversion of 63% was obtained. The Lumped Kinetic Model (LKM) was used to describe the profile of residual TOC concentration due to chemical species, which were categorized into two groups (refractory and non-refractory compounds). The model was able to satisfactorily describe the profile of the residual fractions of these two classes of organic compounds and allowed estimating the related kinetic constants ( k ) at two different temperatures, namely (a) 3.19 × 10 −1 and 2.82 × 10 −3 min −1 for non-refractory and refractory compounds at 80 °C and (b) 4.73 × 10 −1 and 5.09 × 10 −3 min −1 for the same compound classes at 90 °C, while the activation energy ( E a ) of the process was 42.02 and 62.09 kJ mol −1 , respectively. The kinetic modeling of organic pollutants oxidation in liquid effluents would allow to perform in situ seawater treatment on vertical reactors installed in offshore platforms and to properly release treated water into the oceans. In this way, ocean contamination caused by the exploration on offshore platforms of oil and natural gas, the main energy sources and vectors in the current world, may be remarkably reduced, thus favoring a more eco-friendly energy production.

Keywords: p-cresol; HPLC; total organic carbon; advanced oxidation process; Lumped Kinetic Model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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