Geochemistry - GEUS

Så er første runde overstået ved Naturmødet , hvor jeg har deltaget som fagekspert sammen med Jörg Schullehner og Brian Jacobsen i en session om drikkevand og grundvand. Mine pointer var bl.a.: ➡️ Hvis der er stoffer, man ikke ønsker i grundvandet, så giver det fagligt mening at undlade at bruge dem på overfladen. ➡️ Hvis man er nødt til at prioritere, hvor man gør en særlig indsats og særligt ønsker at beskytte det grundvand, der anvendes til drikkevand, så vil en indsats i de sårbare grundvandsdannende have størst effekt. ➡️ At vi i Danmark også skal huske, at vi som samfund har en forpligtelse til at sørge for, at det øvrige grundvand er af god kvalitet. Et fokus på sårbare grundvandsdannede områder må derfor ikke forværre den eksisterende generelle grundvandsbeskyttelse eller betyde, at vi holder op med at blive klogere. Spændende at følge den efterfølgende debat med Pil Christensen, Steffen Helledie, Carl-Emil Larsen og Carl Christian Pedersen. Anden runde på Thunderdome i morgen kl. 14:00 🙂

💧 Så er den 24. VAP-rapport på gaden! 💧 VAP (Varslingssystem for udvaskning af pesticider til grundvandet), som er unikt for Danmark, har siden 1999 systematisk efterprøvet, om den teoretiske risikovurdering, der bruges ved godkendelse af pesticider, holder stik i praksis, eller om der alligevel sker udvaskning af godkendte pesticider og deres nedbrydningsprodukter til grundvandet over den tilladte grænseværdi. Resultaterne anvendes i myndighedernes risikovurdering og efterregulering af pesticider – både i Danmark og i flere andre europæiske lande. Læs nyheden her: https://lnkd.in/eEVm6Rmm Gå i dybden med de nyeste resultater her: https://lnkd.in/eEq96vax #VAP #PLAP #grundvand #groundwater #pesticider #pesticides #GEUS

Claus Kjøller interviewet af DR - Danmarks Radio i forbindelse med Miljø- og Ligestillingsministeriet udgivelse af deres analyse af reguleringsmuligheder i sårbare grundvandsdannede områder:

Så er vi i gang med det nye år 2026 🎇. Nora Badawi (GEUS) og Kirsten Kørup (AGRO) deltog på Plantekongressen i Herning og præsenterede noget af det arbejde, der bliver lavet i danske Varslingssystem for udvaskning af pesticider til grundvand (VAP). Læs mere her:

💫 We are happy to share that Meththika Vithanage, our new Professor of Water Quality Assessment, has received a prestigious Start-up Grant from the Novo Nordisk Foundation 💫   The grant is about Rethinking biochar in CO₂ sequestration: Unexplored redox-driven transformations and their impact on contaminant fate in agricultural soils. 💡🌱   Biochar is increasingly promoted as a tool for climate action through CO₂ sequestration in soils. Yet, important questions remain about its long-term environmental effects – particularly how it interacts with pollutants and affects groundwater quality.   Through the project #BioReCo (Biochar, Redox, and Contaminant fate in CO₂ sequestration), Professor Vithanage and her team will investigate how redox-driven transformations of biochar influence the fate of contaminants such as PFAS and other harmful chemicals in agricultural soils. 🧪🌱   The research will connect climate mitigation with groundwater protection, aiming to ensure that biochar-based solutions are both effective and environmentally safe. ♒ 🌍🛟   “Biochar holds great promise for both carbon sequestration and soil health, but we need to understand its complex chemistry and its impact on emerging contaminants. Adding biochar can alter soil redox conditions, which in turn may influence how emerging contaminants are released or retained, sometimes more strongly than under natural conditions. With this grant, we can explore those unknowns and contribute to more sustainable climate solutions,” says Professor Meththika Vithanage.   Meththika Vithanage specialises in environmental chemistry and the fate and transport of pollutants in groundwater. With a strong research background, she has published extensively, making significant contributions to our understanding of how pollutants transform and behave in the environment, and how biochar can mitigate their effects.💡   An essential part of the project is also to train and mentor early-career researchers, including a PhD and a Postdoc, helping to build new expertise at the intersection of environmental chemistry and climate research.   The grant of nearly 8 million DKK will support the project for four years (2026–2029).   We look forward to following the progress of #BioReCo and its contribution to advancing knowledge on climate-smart and groundwater-safe technologies. Stay tuned. 💡   #Research #Biochar #Groundwater #EnvironmentalChemistry #dkforsk  

Our recent work published in ERL, focused on estimating groundwater denitrification in Denmark using long-term monitoring data. We presented a new concept relying on assessment of nitrate trends in oxic and anoxic nitrate-reducing groundwater using up to 35 years of groundwater monitoring data on nitrate content and groundwater age, dated with CFC or the 3H/3He method. Assessing denitrification in groundwater is essential for more targeted nitrogen regulation of agriculture. Link to the paper: https://lnkd.in/dHaJDDtM This research was part of the geochemical developments for the newly updated map on nitrogen retention in Danmark developed by GEUS and Aarhus University and founded by the Danish Ministry of Green Transition: https://lnkd.in/dFRjZyif #retention #kvælstofretention #DenNationaleKvælstofmodel #dkforsk #GEUS