Description du projet
Étudier la carbonatation des minéraux naturels pour lutter contre le changement climatique
La carbonatation minérale apparaît comme une solution prometteuse pour lutter contre le changement climatique. Cependant, peu d’attention a été accordée à la gestion et à l’amélioration de ses occurrences naturelles. Le projet OASIS, financé par le programme MSCA, vise à combler cette lacune en menant des recherches sur la désagrégation améliorée des roches (ERW pour «enhanced rock weathering») afin d’accélérer ce lent processus. En outre, le projet étudiera l’adsorption de la vapeur d’eau (AVE) dans les zones arides, ce qui pourrait constituer des puits de carbone précieux à long terme. Grâce à des expériences et à des infrastructures permettant de simuler les conditions et les changements climatiques, OASIS devrait améliorer notre compréhension de la carbonatation minérale naturelle. Enfin, l’objectif est de tirer des conclusions sur les avantages des ERW dans les zones arides. Les résultats du projet devraient fournir des arguments convaincants pour la mise en œuvre de mesures de conservation et la promotion de pratiques agricoles durables dans les régions arides.
Objectif
Mineral carbonation is based on the reaction of CO2 with metal oxide bearing materials to precipitate insoluble carbonates, with calcium being one of the most attractive metals. While the development of industrial carbonation processes has been recommended to mitigate climate change, its natural occurrence in soils and its potential enhancement through management practices has received little attention so far. Since natural carbonation is commonly considered to be a slow process, spreading powder of non-carbonated, calcium-bearing minerals over soils, a strategy known as enhanced rock weathering (ERW), is a promising way to accelerate it. While humid tropical areas are generally regarded as having the greatest potential for ERW, recent evidence suggests that carbonation may also be significant in drylands, driven by water vapour adsorption (WVA) by soil at night, potentially representing an overlooked long-term carbon sink. The general objective of the OASIS project is to assess the potential of ERW in dryland soils. Its main underlying assumption is that optimizing WVA with amendment of highly adsorbent ground rock will maximize the carbonation process while reducing the dependence of phototrophic organisms on rainfall or irrigation. To tackle this objective, OASIS will implement field and mesocosm manipulative experiments using cutting-edge infrastructure to control environmental conditions and simulate climate change. These will be coupled to state-of-the-art measurements and isotopic tracing of soil-atmosphere water vapor and CO2 fluxes. This research will contribute to filling several gaps in our understanding of natural carbonation and its interactions with WVA, organisms, and climate change. It is also expected to provide solid arguments to implement conservation measures and sustainable agricultural practices in drylands or seasonally dry lands to protect and increase water and carbon resources, in line with several European and global guidelines.
Champ scientifique
- engineering and technologycivil engineeringwater engineeringirrigation
- natural scienceschemical sciencesinorganic chemistryinorganic compounds
- natural scienceschemical sciencesinorganic chemistryalkaline earth metals
- natural sciencesearth and related environmental sciencesatmospheric sciencesclimatologyclimatic changes
- social scienceseconomics and businessbusiness and management
Mots‑clés
Programme(s)
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Régime de financement
HORIZON-TMA-MSCA-PF-GF - HORIZON TMA MSCA Postdoctoral Fellowships - Global FellowshipsCoordinateur
03690 Alicante
Espagne