11:00 〜 11:15
[AHW20-02] Real time on-site gas analysis - a ballad of (noble) gases, Arsenic and trees
★Invited Papers
Water and other terrestrial fluids crucially impact processes in the deep surface and in the environment, including some that have significant social implications: fracking, nuclear waste disposal, geological CO2 sequestration, natural gas and heat production.
However, our current understanding of (geological) fluid dynamics is rather limited as traditional techniques for gas analysis are time-consuming and involve the laborious analysis of very few samples in high-specialized laboratories. To conclude, available experimental methods fall short in tracking fluid dynamics in real time and under field conditions.
To address these technical limitations that impede real-time gas analysis in environmental and geological systems in the last few years analytical methods were developed to quantify (noble) gas concentrations in terrestrial fluids under real-world conditions [1]. Our second-generation self-contained and portable mass spectrometer miniRUEDI [2] can be operated in the field permitting the quasi-continuous quantification of He, Ne, Ar, Kr, N2, O2, CH4, CO2 and H2 at high temporal resolution (seconds (gases) - minutes (liquids)). Recent tailored technical adjustments empower the instrument to be operated even under harsh conditions such as high temperatures and high water vapor pressures and enable for targeted sampling of rare species for later laboratory analysis.
Our contribution discusses results of on-site gas measurements identifying gas production to modulate geogenic Arsenic mobilization [3] and allowing water and gas transport to be analyzed in-vivo in trees.
[1] ES&T 2012, 46, 8288-8296; ES&T 2016, 50, 13455-13463; ES&T 2017, 51, 846-854; [2] www.gasometrix.com; [3] Water Res. 214, 118199.
However, our current understanding of (geological) fluid dynamics is rather limited as traditional techniques for gas analysis are time-consuming and involve the laborious analysis of very few samples in high-specialized laboratories. To conclude, available experimental methods fall short in tracking fluid dynamics in real time and under field conditions.
To address these technical limitations that impede real-time gas analysis in environmental and geological systems in the last few years analytical methods were developed to quantify (noble) gas concentrations in terrestrial fluids under real-world conditions [1]. Our second-generation self-contained and portable mass spectrometer miniRUEDI [2] can be operated in the field permitting the quasi-continuous quantification of He, Ne, Ar, Kr, N2, O2, CH4, CO2 and H2 at high temporal resolution (seconds (gases) - minutes (liquids)). Recent tailored technical adjustments empower the instrument to be operated even under harsh conditions such as high temperatures and high water vapor pressures and enable for targeted sampling of rare species for later laboratory analysis.
Our contribution discusses results of on-site gas measurements identifying gas production to modulate geogenic Arsenic mobilization [3] and allowing water and gas transport to be analyzed in-vivo in trees.
[1] ES&T 2012, 46, 8288-8296; ES&T 2016, 50, 13455-13463; ES&T 2017, 51, 846-854; [2] www.gasometrix.com; [3] Water Res. 214, 118199.