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Stockholm University

Stockholm University

366 Projects, page 1 of 74
  • Funder: European Commission Project Code: 101043485
    Overall Budget: 1,999,440 EURFunder Contribution: 1,999,440 EUR

    CO2 capture, storage and utilization is judged critical to mitigate the rapid rise in the atmospheric CO2 concentration. A key problem is the gigantic mass of CO2 emitted, which asks for robust, efficient and economically viable approaches that are currently missing and limited by the lack of suitable materials. To break through this barrier, I aim to develop metal-free dual-function porous poly(ionic liquid)s (DPPs) to capture and convert CO2 under ambient conditions into cyclic carbonates with high efficiency, and to apply them in model reactors for cost-effective processing of CO2. Poly(ionic liquid)s (PILs) are innovative ionic materials, in which ionic liquids (ILs) are covalently joined by a macromolecular backbone. ILs are known CO2-philes, and IL-derived PILs are naturally in favour of CO2 sorption, while their ions can be tailor-made for catalytic CO2 transformation. Such dual-function as sorbent and catalyst is the intrinsic merit of PILs to address the CO2 challenge, but unfortunately has been long impeded by the mismatched chemical structures in each function. Our preliminary work proved that the newly emerging 1,2,4-triazolium PILs were catalytic active and drastically more CO2-philic than common polyimidazoliums, and are believed as the game-changer materials. We envision that by structuring chemically tailor-made 1,2,4-triazolium PILs into highly porous materials, they will be able to capture and convert CO2 under ambient conditions. This ground-breaking materials concept will circumvent the complicated, harsh conditions for CO2 fixation, and cut the cost to an affordably low level. This project will radically advance scientific knowledge and technology to fixate and convert CO2 at scale into value-added chemicals that further reduces the consumption of fossil resources. Its outcome will expedite the research in PIL and dual-function materials to revolutionize the CCU routes and equip us with powerful materials tools to mitigate the global CO2 rise.

  • Funder: European Commission Project Code: 616496
  • Funder: European Commission Project Code: 101029198
    Overall Budget: 191,852 EURFunder Contribution: 191,852 EUR

    Plastic is an emerging environmental contaminant that attracts social, political, and scientific attention. However, the effect mechanisms and ecological conditions that promote the consequences of plastic littering remain elusive because of the single-species approach in ecotoxicological testing. To make regulatory decisions mitigating the problem, the potential impacts and vulnerable habitats must be identified. In aquatic ecosystems, macrophyte beds are often a templet habitat providing foraging grounds for pelagic and benthic food webs. These systems are also at the forefront of plastic littering, with high fragmentation and accumulation of microplastic. I propose to conduct a systematic study to understand the multiple interactions between the key components in a coastal habitat exposed to plastic littering. Using the keystone macroalgae species in the Baltic, Fucus vesiculosus, this project aims to evaluate the microplastic effect mechanisms that are related to the species interactions in seaweed beds, with a microbiome being the key component mediating these interactions as well as microplastic retention in the system. I will also investigate the potential of the macrophyte habitat as an entrance point for microplastic in the food web, with particular focus on the primary consumers with different feeding modes. To evaluate the ecosystem health posed by microplastics, the project will also examine effects of microplastic and their leachates on plant physiology, including its growth and metabolite production. Finally, I will evaluate the effects of microplastic exposure on the macrophyte templet functions, including energy transfer efficiency and heat wave resilience. This framework will provide an understanding of the pathways, fate and effects of plastic debris in macrophyte system as well as an approach that applies to other anthropogenic contaminants released into the environment as particulates.

  • Funder: European Commission Project Code: 200971
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  • Funder: European Commission Project Code: 865799
    Overall Budget: 2,748,920 EURFunder Contribution: 2,748,920 EUR

    Despite their abundance in the Earth’s atmosphere, cloud formation and evolution are still poorly understood. This is particularly true for the interactions clouds have with atmospheric aerosol particles and their precursor vapors, which hampers our knowledge on the role that clouds and precipitation play in the climate system and in governing air quality. I argue that a major fraction of these uncertainties stem from inconsistencies and discontinuities in treating 1) the molecular phase transitions driving the dynamic cloud formation processes; 2) the interplay between atmospheric chemical composition and atmospheric dynamics; 3) the complex role that clouds play as both sources and sinks of particulate matter, but also as subjects to changes driven by aerosol particles. INTEGRATE will address these inconsistencies, and acquire a comprehensive picture of the phase transitions leading to cloud formation over the relevant scales. INTEGRATE will fill the key knowledge gaps through work in 1) the process scale, developing, applying and evaluating descriptions of molecular phase transitions within clouds; 2) the cloud scale, integrating the relevant chemical, microphysical and dynamic phenomena in a 3-dimensional cloud simulation framework; 3) the regional and global scales, studying interactions between aerosol loadings and clouds in past, present and future climates using chemical transport and earth system modeling. Systematic approaches for bridging the gap between the various time and spatial scales will also be developed within INTEGRATE. If successful, INTEGRATE will open new avenues for 1) fundamental understanding of the physics and chemistry of atmospheric phase transitions; 2) improved climate projections and ultimately better policies for reaching the targets of the Paris agreement; 3) better predictions of factors controlling air quality, hence facilitating the design of better policies to improve the quality of the air we breathe.

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