Description

Persistent organic pollutants (POPs) are hazardous compounds that bioaccumulate throughout the food chain and may exert adverse effects on human health. Several processes, including adsorption, photocatalysis and electrocoagulation, have been investigated to address this issue; however, none of these approaches enables the efficient and complete degradation of POPs. Owing to its efficiency, operational simplicity and accessibility, electro-oxidation (EO) has attracted increasing attention for the treatment of POP-contaminated media. Nevertheless, despite its advantages, this technology remains relatively costly, mainly due to the high energy demand and the nature of the electrode materials. The rational selection of electrode materials is therefore crucial, as it directly affects the overall efficiency of the process.
The objective of this PhD thesis is to synthesize and design innovative, environmentally friendly electrodes for the efficient removal of POPs. Novel electrodes based on layered double hydroxides (LDHs) will be synthesized using polysaccharides, which offer several advantages in terms of biodegradability, porosity and cost-effectiveness. The polymerization process will be initiated through the use of non-toxic crosslinking agents under environmentally benign conditions.
This PhD project will also aim to evaluate POP degradation using these electrodes, which are expected to facilitate electron transfer and generate reactive radical species involved in the formation of intermediate compounds. Electro-oxidation treatments are expected to promote the complete mineralization of POPs into CO₂ and H₂O under standard temperature and pressure conditions.

Skills required

The candidate must hold a Master’s degree in materials chemistry or materials science, or an engineering degree in chemistry and/or materials science. A strong background in materials synthesis, chemical surface modification and functionalization of bio-based materials is expected. Previous experience with naturally derived materials, polymers, polysaccharides, hybrid materials or functional systems for environmental or electrochemical applications will be particularly appreciated. The recruited candidate should be able to conduct experimental work with rigor, participate to the establishment of reproducible protocols, critically analyze the results obtained and propose relevant methodological adjustments. Skills in the physicochemical characterization of materials, particularly through spectroscopy, thermal analysis or electrochemical techniques, will be considered an important asset. Knowledge of electrochemistry and environmental chemistry will be highly valued. The candidate should also demonstrate strong motivation for scientific research, progressive autonomy, organizational skills, as well as a genuine ability to work as part of a team within a collaborative and interdisciplinary research environment. Good written and oral communication skills in French and/or English will also be expected for the dissemination of results through reports, scientific communications and publications.

Bibliography

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Keywords

Persistent organic pollutant, Bio-based materials, Electrochemistry