Seminars with external speakers will be once or twice a month. On other weeks, seminars are held by the internal AMGC researchers, students, and guests.
For more information, contact Pieter Rodts, Sybrien Lievens, or Maxwell Thiemens.
Program 2024-2025
THURSDAY 27 March 2025, 4 PM CET
Dr. Stefan Wagner
Chair of General and Analytical Chemistry, Montanuniversität Leoben (Austria)
Tracing the labile: Advancing diffusion spectrometry via DGT and ICP-MS to assess solute dynamics across scales and disciplines
Solutes are crucial in biogeochemical and technological processes, yet their dynamic behavior is often hard to capture due to their labile nature. Historically, the lack of suitable methods to assess the dynamic spatial and temporal variations of labile solute species in situ has limited our understanding. Diffusion spectrometry – combining Diffusive Gradients in Thin films (DGT) with advanced ICP-MS techniques – is transforming solute analysis. This method provides high-resolution, multi-element, and isotopic insights into solute fluxes, even at ultra-trace levels.
This presentation will showcase key advances in diffusion spectrometry through three case studies. First, a novel DGT-MC-ICP-MS approach enables simultaneous quantification of labile strontium (Sr) and lead (Pb) concentrations and isotope ratios in natural waters, offering fresh perspectives on their mobility and bioavailability in aquatic and terrestrial systems. Next, the application of DGT with LA-ICP-MS reveals localized metal ion dynamics in corrosion processes, advancing our understanding of material degradation. Finally, the development of diffusion spectrometry as an innovative diagnostic tool for medical applications will be presented. Specifically, skin patches based on selective DGT binding layers have been designed to determine a range of trace element solutes and copper (Cu) isotope ratios in sweat on human skin. This non-invasive approach potentially opens new ways towards early disease detection in personalized medicine.
FRIDAY 4 April 2025, (time TBD)
Prof. Dr. Ivan Kourtchev
Associate Professor in Environmental Analytical Chemistry at Coventry University, UK.
Unseen but Ubiquitous: The Overlooked Atmospheric Pathways of Emerging Contaminants
Emerging contaminants (ECs), including industrial chemicals and pharmaceuticals, are a growing concern due to their persistence and potential impacts on human health. Per- and polyfluoroalkyl substances (PFAS), a subset of ECs known as "forever chemicals," have dominated headlines for their widespread contamination, yet their presence in the atmosphere remains largely overlooked. Our study in the Amazon rainforest provided the first evidence of PFAS in a pristine environment, raising new questions about their transport through the air and sources of emissions.
This talk examines the overlooked role of the atmosphere in EC distribution, using case studies from their observation in Amazon to industrial processes that contribute to their airborne transport. These findings challenge conventional views on pollution pathways and emphasise the need for integrated air and water monitoring.
THURSDAY 24 April 2025, (time TBD)
Prof. Dr. Helen Williams
Professor of Geochemistry and Planetary Science at the University of Cambridge
From Hard Rock to Heavy Metal - how high-mass metal stable isotopes are helping us understand the Earth’s mantle
The silicate mantles of terrestrial planets constitute the vast proportion of their mass and govern the chemical and geodynamic evolution of these bodies. Understanding the physical and chemical interplay between the solid Earth’s main chemical reservoirs - mantle, crust and core - is a fascinating subject that has challenged geochemists for decades. In this talk, I will discuss how the development of a vast spectrum of high mass (> 20 amu) stable isotope systems has contributed to the field of mantle geochemistry over the last decade and the new opportunities and challenges that the application of these tracers has provided, with a particular focus on rocks formed in the first billion years of Earth’s history and modern mantle plumes.
THURSDAY 15 May 2025, 4 PM CET
Prof. Dr. Maikel Kuijpers
TBD
TBD
PREVIOUS SEMINARS
THURSDAY 13 February 2025, 3 PM CET
Kelle Moreau
Science communicator of the Royal Belgian Institute of Natural Sciences
Science that is not communicated has not happened. The why and how of science communication
Kelle Moreau is biologist and science communicator at the Royal Belgian Institue for Natural Sciences. He is enthusiastic about talking with us on how to translate scientific research in the broad field of Earth Studies to a broader, non-specialist audience.
THURSDAY 27 February 2025, 1 PM CET - INTERNAL AMGC SEMINAR
Dr. Maxwell Thiemens(1) | Pieter Rodts(2) | Sybrien Lievens(3)
1. Senior postdoctoral researcher AMGC-VUB
2. Doctoral researcher AMGC-VUB, Innoviris mandate
3. Doctoral researcher AMGC-VUB, OZR4347 mandate
Ongoing research in AMGC
Today’s seminar dives into the exciting research of our 2025 seminar team! From environmental chemistry (e.g. microplastics) to archaeology (e.g. human-animal relations in the Sonian Forest) and planetology, discover what their work is about on 27/02! 🧪🌍🏺
Maxwell Thiemens will give an overview of his research, and what “planetology” is.
One of the key questions in that field regard the origins of water in the Earth-Moon system, particularly with the need for water resources in the race to establish lunar bases. The candidate origins of lunar water are an indigenous lunar component, solar wind water production, and the delivery of meteoritic and cometary material. Characterizing the oxygen isotopic composition of water provides information on lunar oxygen sources. In our recent study, we used an exciting technique to determine where this water might be coming from, by analyzing a suite of samples from the Apollo mission. Excitingly, this found the first measurements of cometary water.
Pieter Rodts will give an overview of his research on human-animal interactions in the Sonian forest.
The landscapes we move through today are shaped by long histories of human-animal interactions. Paths, earthen walls, clearings, and other forms of infrastructure often emerge not solely from human intention, but through the entangled movements, behaviours, and needs of multiple species. In this lecture, Pieter Rodts, PhD candidate in art science and archaeology, will introduce his ongoing doctoral research on the Sonian Forest, exploring how past human-animal relations have left material traces that continue to influence the landscape and the experience of the forest today. By studying these material traces, we can not only reconstruct the past multispecies ‘conversations’ that shaped these infrastructures, but also rethink the role of humans, animals, and (old) infrastructure in the Sonian Forest today, shaping a new understanding of and interaction with the landscape that fosters a more sustainable engagement with the rich biodiversity of Sonian.
Sybrien Lievens will give an overview of her research on "Hg-analysis" and microplastic characterization techniques.
Understanding Hg cycling is crucial, as its bioavailability and toxicity depend on its speciation, yet highly complex due to interactions with other environmental accumulators like microplastics (MPs, 1 μm to 5 mm in size). These MPs, pervasive pollutants in aquatic ecosystems, undergo aging and biofilm formation which alter their surface properties and pollutant interactions. However, the potential role of MPs in driving Hg transformations and transportation remains unexplored. Through a combination of in situ and controlled laboratory experiments, Sybrien integrates advanced Hg analysis ((GC-)CVAFS,
(CT-)GC-ICP-MS) and MP characterization techniques (FTIR, SEM) to: 1) assess the freshwater pollution state of MPs and Hg species, 2) simulate environmental aging to evaluate their effects on Hg interactions, 3) determine to what extent the biofilm influences Hg transformations and its possible amplification by abiotic factors (light and aging) and 4) apply a mass balance approach to contextualize MP-Hg dynamics in the Scheldt estuary. She will give an overview of the current experiments and data of this new project.
TUESDAY 4 March 2025, 1 PM CET
Em. Prof. Dr. Tim Ingold
Professor Emeritus of Social Anthropology, University of Aberdeen
The stone in my pocket: towards a science of correspondence
This talk begins with a flint stone in the author’s collection, in which is embedded the fossil of a scallop shell. Wrapped up in the stone are stories of earth formation, marine life, climate change and agriculture. But what of the biography of the author-collector? According to mainstream science, the book of nature was closed long before people arrived to read it. It is for science to dig down, to retrieve nature’s secrets. But this also means bringing up what is found there. What nature deposits, science extracts. The author’s stone, with its fossil, was not however dug up. It rose to the surface in the turn of a ground formed where the earth meets the sky, in the cycle of organic growth and atmospheric erosion. To walk this ground is to interpolate one’s own life into the cycle, and to experience nature in its original sense – not as a closed book but as a power of renewal. Here, humans and other-than-humans carry on their lives together, responding to one another as they go. Might we find in this correspondence the germs of a new science?