Publications de Luca Loreggian

Pentavalent U reactivity impacts U isotopic fractionation during reduction by magnetite

Rizlan Bernier-Latmani, Barbora Bártová, Luca Loreggian, Zezhen Pan

Meaningful interpretation of U isotope measurements relies on unraveling the impact of reduction mechanisms on the isotopic fractionation. Here, the isotope fractionation of hexavalent U [U(VI)] was investigated during its reductive mineralization by magne ...

2024

Role of Iron Sulfide Phases in the Stability of Noncrystalline Tetravalent Uranium in Sediments

Rizlan Bernier-Latmani, Luca Loreggian

Uranium (U) in situ bioremediation has been investigated as a cost-effective strategy to tackle U contamination in the subsurface. While uraninite was believed to be the only product of bioreduction, numerous studies have revealed that noncrystalline U(IV) ...

AMER CHEMICAL SOC2020

Effect of Aging on the Stability of Microbially Reduced Uranium in Natural Sediment

Rizlan Bernier-Latmani, Barbora Bártová, Agnès Novotny, Yuheng Wang, Sophie Louise Bretagne, Luca Loreggian

Reductive immobilization of uranium has been explored as a remediation strategy for the U-contaminated subsurface. Via the in situ biostimulation of microbial processes, hexavalent U is reduced to less soluble tetravalent species, which are immobilized wit ...

2019

Microbially Mediated Release of As from Mekong Delta Peat Sediments

Rizlan Bernier-Latmani, Manon Frutschi, Yuheng Wang, Karen Elda Viacava Romo, Luca Loreggian, Maria Pilar Asta Andres

Peat layers within alluvial sediments are considered effective arsenic (As) sinks under reducing conditions due to the binding of As(III) to thiol groups in natural organic matter (NOM) and the formation of As-bearing sulfide phases. However, their possibl ...

2019

H2-fuelled microbial metabolism in Opalinus Clay

Rizlan Bernier-Latmani, Luca Loreggian, Carla Perez Mon, Niels Burzan, Aislinn Ann Boylan

In Switzerland, the Opalinus Clay formation is considered the most likely host rock for a deep geological repository for nuclear waste. In deep geological repositories, H2 is expected to be the most abundant gas formed from the degradation of waste and fro ...

2019

Non-crystalline tetravalent uranium species in the subsurface: formation and stability

Luca Loreggian

Uranium (U) contamination of ground and surface waters poses an acute hazard on the ecosystem and human health. Since the discovery of microbial U(VI) reduction, U bioremediation has been explored as a promising and cost-effective method compared to tradit ...

EPFL2019

The stability of non-crystalline U(IV) under oxic and anoxic conditions

Rizlan Bernier-Latmani, Agnès Novotny, Sophie Louise Bretagne, Luca Loreggian

AMER CHEMICAL SOC2018

Removal of pharmaceuticals in pre-denitrifying MBBR Influence of organic substrate availability in single- and three-stage configurations

Luca Loreggian

Due to the limited efficiency of conventional biological treatment, innovative solutions are being explored to improve the removal of trace organic chemicals in wastewater. Controlling biomass exposure to growth substrate represents an appealing option for ...

Pergamon-Elsevier Science Ltd2017