In this internship, we propose a study of the dynamics of CO2 transfer and capture through a single film. The approach will be essentially experimental, while theoretical development could also be considered through advection-diffusion models for transport. The study configuration envisaged is as follows: a single soap film, potentially seeded with algae, will be produced in a microfluidic chip. Mixtures of CO2 and air will be injected on both side of the film. The liquid phase may be renewed by imposing a flow between two of its extremities, as would be the case in a foam through the action of gravity-induced drainage or injection of fresh liquid by the operators. Several quantities will be monitored over time: the CO2 content on each side of the film, the quantity of trapped algae, their organization, their flow, and the CO2 concentration in the liquid phase. These experiments will be carried out for different gas proportions, liquid flows, and types and concentrations of algae. The biological aspects will be dealt with in collaboration with the Cell & Plant Physiology Laboratory (LPCV), that is hosted in CEA Grenoble