Jenna Poonoosamy
Research Scientist
Peer Reviewed Publications
My research articles are focused on:

Development of proof-of-concept lab-on-chip methodologies for the investigation of coupled-hydrogeochemical processes.

  1. Santoso, R.; Lönartz, M.I.; Yang, Y.; Poonoosamy, J.; Process-based machine learning toolbox for probing transport dynamics in microfluidics devices. Submitted

  2. Santoso, R.; Guillon, L.; Deissmann, G.; Poonoosamy, J.; Machine learning-assisted droplet microfluidics experiments for investigating metastability of amorphous calcium carbonate. Rep. 2025, 15(1), 20178, doi:10.1038/s41598-025-05984-0.

  3. Poonoosamy, J.; Kaspor, A.; Schreinemachers; C., Bosbach; D., Cheong, O.; Kowalski, P.; Obaied, A. A radiochemical lab-on-a-chip paired with computer vision to unlock the crystallization kinetics of (Ba,Ra)SO4. Rep. 2024, 14(1), 9502, doi:10.1038/s41598-024-59888-6.

  4. Poonoosamy, J.; Soulaine, C.; Burmeister, A.; Deissmann, G.; Bosbach, D.; Roman, S. Microfluidic flow-through reactor and 3D Raman imaging for in situ assessment of mineral reactivity in porous and fractured porous media. Lab Chip 2020, 20, 2562-2571, doi:10.1039/D0LC00360C.

  5. Prasianakis, N.I.; Haller, R.; Mahrous, M.; Poonoosamy, J.; Pfingsten, W.; Churakov, S.V. Neural network-based process coupling and parameter upscaling in reactive transport simulations. Cosmochim. Acta. 2020, 291, 126-143, doi:10.1016/j.gca.2020.07.019.

  6. Poonoosamy, J.; Westerwalbesloh, C.; Deissmann, G.; Mahrous, M.; Curti, E.; Churakov, S.V.; Klinkenberg, M.; Kohlheyer, D.; von Lieres, E.; Bosbach, D.; Prasianakis, N.I. A microfluidic experiment and pore-scale modelling diagnostics for assessing mineral precipitation and dissolution in confined spaces. Geol. 2019, 528, 119264, doi:10.1016/j.chemgeo.2019.07.039.


 

Investigation of crystallization processes in confinement/porous media

  1. Poonoosamy, J.; Obaied, A.; Deissmann, G.; Prasianakis, N.I.; Kindelmann, M.; Wollenhaupt, B.; Bosbach, D.; Curti, E. Microfluidic investigation of pore-size dependency of barite nucleation. Chem. 2023, 6, 250, doi:10.1038/s42004-023-01049-3.

  2. Poonoosamy, J.; Mahrous, M.; Curti, E.; Bosbach, D.; Deissmann, G.; Churakov, S.V.; Geisler, T.; Prasianakis, N. A lab-on-a-chip approach integrating in-situ characterization and reactive transport modelling diagnostics to unravel (Ba,Sr)SO4 oscillatory zoning. Rep. 2021, 11, 23678, doi:10.1038/s41598-021-02840-9.

  3. Prasianakis, N.I.; Curti, E.; Kosakowski, G.; Poonoosamy, J.; Churakov, S.V. Deciphering pore-level precipitation mechanisms. Rep. 2017, 7, 13765, doi:10.1038/s41598-017-14142-0.

  4. Poonoosamy, J.; Curti, E.; Kosakowski, G.; Grolimund, D.; Van Loon, L.R.; Mäder, U. Barite precipitation following celestite dissolution in a porous medium: A SEM/BSE and μ-XRD/XRF study. Cosmochim. Acta. 2016, 182, 131-144, doi:10.1016/j.gca.2016.03.011.


 

Combining experiments and simulation to investigate the effect of mineral dissolution and precipitation on the transport properties of porous media and mineral reactivity

  1. Lönartz, M.I.; Yang, Y.; Deissmann, G.; Bosbach, D.; Poonoosamy, J. Capturing the dynamic processes of porosity clogging. Water Resour. Res. 2023, 59, e2023WR034722, doi:10.1029/2023WR034722.

  2. Deng, H.; Poonoosamy, J.; Molins, S. A reactive transport modeling perspective on the dynamics of interface-coupled dissolution-precipitation. Geochem. 2022, 137, 105207, doi: 10.1016/j.apgeochem.2022.105207.

  3. Poonoosamy, J.; Lu, R.; Lönartz, M.I.; Deissmann, G.; Bosbach, D.; Yang, Y. A lab on a chip experiment for upscaling diffusivity of evolving porous media. Energies 2022, 15, 2160, doi:10.3390/en15062160.

  4. Poonoosamy, J.; Haber-Pohlmeier, S.; Deng, H.; Deissmann, G.; Klinkenberg, M.; Gizatullin, B.; Stapf, S.; Brandt, F.; Bosbach, D.; Pohlmeier, A. Combination of MRI and SEM to assess changes in the chemical properties and permeability of porous media due to barite precipitation. Minerals 2020, 10, 226.

  5. Poonoosamy, J.; Klinkenberg, M.; Deissmann, G.; Brandt, F.; Bosbach, D.; Mäder, U.; Kosakowski, G. Effects of solution supersaturation on barite precipitation in porous media and consequences on permeability: Experiments and modelling. Cosmochim. Acta. 2020, 270, 43-60, doi: 10.1016/j.gca.2019.11.018.


Reactive transport processes with gases

  1. Wegner, L.; Pohlmeier, A.; Wang, Y.; Klinkenberg, M.; Poonoosamy J. In-situ study of coupled mineral dissolution and precipitation processes with gas production in porous media using magnetic resonance imaging. Water Resour. Res. 2025, 61, e2025WR040035, doi:10.1029/2025WR040035.

  2. Poonoosamy, J.; Santoso, R.; Kaspor, A.; Wegner, L.; Dagnelie, R.V.H.; Miron, G.D. The cauliflower effect: unravelling coupled mineral dissolution and precipitation with gas exsolution. submitted


Benchmarking against experiments or other numerical codes

  1. Lu, R.; Nagel, T.; Poonoosamy, J.; Naumov, D.; Fischer, T.; Montoya, V.; Kolditz, O.; Shao, H. A new operator-splitting finite element scheme for reactive transport modeling in saturated porous media. & Geosci. 2022, 163, 105106, doi:10.1016/j.cageo.2022.105106.

  2. Poonoosamy, J.; Wanner, C.; Alt Epping, P.; Águila, J.F.; Samper, J.; Montenegro, L.; Xie, M.; Su, D.; Mayer, K.U.; Mäder, U.; et al. Benchmarking of reactive transport codes for 2D simulations with mineral dissolution–precipitation reactions and feedback on transport parameters. Geosci. 2021, 25, 1337-1358, doi:10.1007/s10596-018-9793-x.

  3. Idiart, A.; Laviña, M.; Kosakowski, G.; Cochepin, B.; Meeussen, J.C.L.; Samper, J.; Mon, A.; Montoya, V.; Munier, I.; Poonoosamy, J.; et al. Reactive transport modelling of a low-pH concrete/clay interface. Geochem. 2020, 115, 104562, doi:10.1016/j.apgeochem.2020.104562.

  4. Poonoosamy, J.; Kosakowski, G.; Van Loon, L.R.; Mäder, U. Dissolution–precipitation processes in tank experiments for testing numerical models for reactive transport calculations: Experiments and modelling. Contam. Hydrol. 2015, 177-178, 1-17, doi:10.1016/j.jconhyd.2015.02.007.


Experiments and modelling to investigate radionuclide migration in clays

  1. Ait-Mouheb, N.; Yang, Y., Deissmann, G.; Klinkenberg, M.; Poonoosamy, J.; Vinograd, V.; Van Loon, L.R.; Bosbach, D. Retention of 226Ra in the sandy Opalinus Clay facies from the Mont Terri rock laboratory, Switzerland. Geochem. 2024, 170, 106048, doi: 10.1016/j.apgeochem.2024.106048.

  2. Yang, Y.; Churakov, S.V.; Patel, R.A.; Prasianakis, N.; Deissmann, G.; Bosbach, D.; Poonoosamy, J. Pore-scale modeling of water and ion diffusion in partially saturated clays. Water Resour. Res. 2024, 60, e2023WR035595, doi:10.1029/2023WR035595.

  3. Descostes, M.; Pointeau, I.; Radwan, J.; Poonoosamy, J.; Lacour, J.L.; Menut, D.; Vercouter, T.; Dagnelie, R.V.H. Adsorption and retarded diffusion of EuIII-EDTA through hard clay rock. Hydrol. 2017, 544, 125-132, doi:10.1016/j.jhydrol.2016.11.014.


 

Combining experiments and geochemical modelling to investigate contaminant retention or degradation processes

  1. Poonoosamy, J.; Kaspor, A.; Rudin, S.; Murphy, G.L.; Bosbach, D.; Deissmann, G. The use of microfluidic platforms with Raman spectroscopy for investigating the co-precipitation of metals and radionuclides in carbonates. Minerals 2023, 13, 636, doi:10.3390/min13050636

  2. Ferrand, K.; Klinkenberg, M.; Caes, S.; Poonoosamy, J.; Van Renterghem, W.; Barthel, J.; Lemmens, K.; Bosbach, D.; Brandt, F. Dissolution kinetics of international simple glass and formation of secondary phases at very high surface area to solution ratio in young cement water. Materials 2021, 14, 1-22, doi:10.3390/ma14051254.

  3. Brandt, F.; Klinkenberg, M.; Poonoosamy, J.; Bosbach, D. Recrystallization and uptake of 226Ra into Ba-rich (Ba,Sr)SO4 solid solutions. Minerals 2020, 10, 812, doi:10.3390/min10090812.

  4. Brandt, F.; Klinkenberg, M.; Poonoosamy, J.; Weber, J.; Bosbach, D. The effect of ionic strength and Sraq upon the uptake of Ra during the recrystallization of barite. Minerals 2018, 8, 502, doi:10.3390/min8110502.

  5. Klinkenberg, M.; Weber, J.; Barthel, J.; Vinograd, V.; Poonoosamy, J.; Kruth, M.; Bosbach, D.; Brandt, F. The solid solution–aqueous solution system (Sr,Ba,Ra)SO4 + H2O: A combined experimental and theoretical study of phase equilibria at Sr-rich compositions. Geol. 2018, 497, 1-17, doi: 10.1016/j.chemgeo.2018.08.009.

  6. Poonoosamy, J.; Brandt, F.; Stekiel, M.; Kegler, P.; Klinkenberg, M.; Winkler, B.; Vinograd, V.; Bosbach, D.; Deissmann, G. Zr-containing layered double hydroxides: Synthesis, characterization, and evaluation of thermodynamic properties. Clay Sci. 2018, 151, 54-65, doi:10.1016/j.clay.2017.10.013.


Nuclear waste forms: (Thermodynamic modelling and experimental investigation)

  1. Lender, T.; Murphy, G.; Bazarkina, E.; Bukaemskiy, A.; Gilson, S.; Henkes, M.; Hennig, C.; Kaspor, A.; Marquardt, J.; Nießen, J.; Peters, L.; Poonoosamy, J.; Rossberg, A.; Svitlyk, V.; Kvashnina, K.O.; Huittinen, N. Investigation of radiation damage in the monazite-type solid solution La1–xCexPO4. Chem. 2024, 63, 17525-17535, doi:10.1021/acs.inorgchem.4c02041.

  2. Chollet, M.; Martin, P.; Degueldre, C.; Poonoosamy, J.; Belin, R.C.; Hennig, C. Neptunium characterization in uranium dioxide fuel: Combining an XAFS and a thermodynamic approach. Alloys Compd. 2016, 662, 448-454, doi:10.1016/j.jallcom.2015.12.005.

  3. Degueldre, C.; Pin, S.; Poonoosamy, J.; Kulik, D.A. Redox state of plutonium in irradiated mixed oxide fuels. Phys. Chem. Solids 2014, 75, 358-365, doi:10.1016/j.jpcs.2013.11.001.


Position/ Review /State of the Art Articles

  1. Roman, S.; Rembert, F.; Kovscek, A.; Poonoosamy, J. Microfluidics for geosciences: metrological developments and future challenges. Lab Chip. 2025,org/10.1039/d5lc00108k.

  2. Lei, W.; Yang, Y.; Yang, S.; Zhang, G.; Poonoosamy, J.; Juel, A.; Meheust, Y.; Bagheria, S.; Wang, M. Advancing sustainable energy solutions with microfluidic porous media. Lab Chip 2025, 25, 3374-3410, doi:10.1039/D5LC00206K.

  3. Claret et al. EURAD state-of-the-art report: Development and improvement of numerical methods and tools for modeling coupled processes in the field of nuclear waste disposal. Nucl. Eng. 2024, 3, 1437714, doi:10.3389/fnuen.2024.1437714.

  4. Maes et al. EURAD state-of-the-art report on the understanding of radionuclide retention and transport in clay and crystalline rocks. Nucl. Eng. 2024, 3, 1417827, doi:10.3389/fnuen.2024.1417827.

Book Chapter

  1. He, W., Poonoosamy, J., Kosakowski, G., Van Loon, L.R., Mäder, U., Kalbacher, T., 2016. Chapter 10, Reactive Transport, in: Kolditz, O., Görke, U.J., Wang, W., Shao, H., Bauer, S. (eds.), Thermo-Hydro-Mechanical-Chemical Processes in Fractured Porous Media: Modeling and Benchmarking. Springer International Publishing.


 
Conference Proceedings

  1. Poonoosamy, J.; Lönartz, M.I.; Yang, Y.; Deissmann, G.; Kosakowski, G.; Bosbach, D. Reactive transport modeling for assessing coupled hydrogeochemical processes at interfaces in deep geological repositories: from the laboratory to the real world. Nucl. Waste Disposal 2023, 2, 123-124, doi:10.5194/sand-2-123-2023.

  2. Brandt, F.; Klinkenberg, M.; Caes, S.; Poonoosamy, J.; Van Renterghem, W.; Barthel, J.; Lemmens, K.; Bosbach, D.; Ferrand, K. Dissolution of simplified nuclear waste glass and formation of secondary phases. Nucl. Waste Disposal 2021, 1, 143-144, doi:10.5194/sand-1-143-2021.

  3. Lönartz, M.I.; Poonoosamy, J.; Yang, Y.; Ait-Mouheb, N.; Deissmann, G.; Bosbach, D. Deciphering porosity clogging at barrier interfaces in deep geological repositories for radioactive waste. Saf. Nucl. Waste Disposal 2021, 1, 181-182, doi:10.5194/sand-1-181-2021.

  4. Poonoosamy, J.; Klinkenberg, M.; Lönartz, M.; Yang, Y.; Deissmann, G.; Brandt, F.; Bosbach, D. Combining innovative experimental approaches and cross-scale reactive transport modelling for assessing coupled hydrogeochemical processes at interfaces in deep geological repositories for radioactive waste. Saf. Nucl. Waste Disposal 2021, 1, 105-107, doi:10.5194/sand-1-105-2021.

  5. Degueldre, C.; Cozzo, C.; Martin, M.; Grolimund, D.; Poonoosamy, J.; Kulik, D. Redox behaviour of americium in mixed oxide fuels. Proceedings of the LWR Fuel Performance Meeting, Top Fuel 2013, 2013; 1195-1200.