Scaled-up electrochemical reactor with a fixed bed three-dimensional cathode for electro-Fenton process: Application to the treatment of bisphenol A

Abstract

To cite this version:Ayman Chmayssem, Samir Taha, Didier Hauchard. Scaled-up electrochemical reactor with a fixed bed three-dimensional cathode for electro-Fenton process: Application to the treatment of bisphenol A. Electrochimica Acta, Elsevier, 2017Elsevier, , 225, pp.435-442. <10.1016Elsevier, /j.electacta.2016 AbstractIn this study, we report on the development of an open undivided electrochemical reactor with a compact fixed bed of glassy carbon pellets as three-dimensional cathode for the application of electro-Fenton process. Bisphenol A (BPA) was chosen as model molecule in order to improve its efficiency to the treatment of persistent pollutants. The study of the BPA removal efficiency in function of the applied current intensity was investigated in order to determine the limiting current of O2 reduction (optimal conditions of H2O2 production at flow rate of 0.36 m 3 .h -1 ) which was 0.8 A (0.5 A / 100 g of glassy carbon pellets). Many parameters have been carried out using this electro-Fenton reactor namely degradation kinetics, influence of anodic reactions on DSA, effect of initial pollutant concentration. In the optimal current condition, the global production rate of H2O2 and • OH was investigated. The yield of electro-Fenton reaction (conversion of H2O2 to • OH) was very high (> 90 %). The absolute rate of BPA degradation was determined as 4.3 × 10 9 M -1 s -1 . COD, TOC and BOD5 measurements indicated that only few minutes of treatment by electro-Fenton process were needed to eliminate BPA for dilute solutions (10 and 25 mg.L -1 ). In this case, the biodegradability of the treated solutions occurred rapidly. For higher concentration levels, an efficient removal of BPA appeared for treatment time higher than 1 hour and more than 90 minutes were necessary to obtain the biodegradability of BPA solutions. In optimum conditions, the scale-up of the electrochemical reactor applied to electro-Fenton process was suggested and depended on the concentration level of the pollutant. The operating parameters of the scaled-up reactor might be deduced from the new section of each fixed bed exposed to the flow, from values of liquid flow velocity and from the corresponding limiting current density obtained with the reactor at laboratory scale. The compact fixed bed cathode in an open undivided electrochemical reactor appears as an appropriate solution as pre-treatment electro-Fenton process followed by the biological treatment of persistent pollutant.

Influence of Aqueous Chloride and Bromide Anions on the Reactivity of ZnO&nbsp;on Bisphenol a Degradation

“…studied. Chemical oxidation is widely used for wastewater treatment, such as Fenton process (Chmayssem et al 2017) and ozone treatment (Akbari et al 2016) could effectively oxidize the organic contaminants in the aquatic system. Electrochemical method (Gui et al 2018) is to apply electrolysis for contaminant removal.…”

“…In China, up to 144 ng/mL of bisphenol analogues was detected in serum samples from pregnant women (Li et al 2020) studied. Chemical oxidation is widely used for wastewater treatment, such as Fenton process (Chmayssem et al 2017) and ozone treatment (Akbari et al 2016) could effectively oxidize the organic contaminants in the aquatic system. Electrochemical method (Gui et al 2018) quickly dissolute silver nanoparticles in the solution, therefore PVA was further immobilized to stabilize the nanoparticle.…”

Bisphenol A Removal From Aqueous Phase via Polymeric Microbeads/ Polimerik Mikroküreler ile Bisfenol A Uzaklaştırılması

“…Up to the present, various techniques have been used to remove BPA from aqueous solutions such as adsorption [5][6][7], biodegradation [8][9][10], electrochemical techniques [11,12] and advanced oxidation techniques [13][14][15]. Adsorption is very simple and effective due to its ease of operation and relatively low cost.…”

Novel arrangement for an electro-Fenton reactor that does not require addition of iron, acid and a final neutralization stage. Towards the development of a cost-effective technology for the treatment of wastewater

“…In this communication, we are reporting a preliminary study on a novel reactor arrangement designed to overcome these important drawbacks. It is hoped that this reactor arrangement could constitute the basis for the development of efficient and cost effective electro-Fenton water treatment processes well suited for a wide variety of polluted wastewaters ( Ma et al., 2016 , Roth et al., 2016 , Chmayssem et al., 2017 ).…”