We warmly invite you to participate in the SCIENTÍFika series of seminars organised by the User Office at MAX IV
Where – Virtual format by Zoom call https://lu-se.zoom.us/j/61349123545
When – Mondays 13:45 CET
Format – 30 minutes of presentation followed by 15 minutes of discussion, chaired by MAX IV staff
Monday 11 October 2021, 13:45 CET
Direct visualisation of nano-particle aggregation and retention inside porous media
Speaker: Dr Henning Osholm Sørensen, Senior Researcher, Department of Physics, Technical University of Denmark
Host: Dr Innokenty Kantor, manager at DANMAX beamline
Keywords: X-ray tomography, nanoparticles, porous media, environmental remediation
Engineered nanoparticles are increasingly being used for different applications. Over time they will be released into the environment. Some of the engineered nanoparticles are developed and introduced into the environment on purpose in order to perform e.g. remediation of soils contaminated by chlorinated organic compounds. Whether realised consciously or unintentionally introduced to the environment they can constitute an environmental risk. Therefore, we need to understand, and in turn be able to predict, the fate of the nanoparticles hereunder how they are transported and retained in porous media. Currently, very little is known about the basic processes involved in retaining nanoparticles during transport in porous media. We have, recently, started to study these processes that occur when injecting sulfidised zerovalent iron nanoparticles (S-nZVI) into porous media. We image the nanoparticles retained in porous sands directly at various stages and under different injection conditions. Here, we will present the first results showing the feasibility of studying nanoparticle retention mechanisms in porous materials using X-ray tomography and some outline some future ideas of using DanMAX at MAX-IV to perform in situ 3D imaging at different scales.
We look forward to see you online and hope you enjoy the talk!
Full Programme of the series available here.