2020 - Senior Research Assistant Mineralogy Group, University of Bern
2017 - 2020 Project Manager, Foundation ZAR
2014-2017 PhD in Environmental Geochemistry, University of Bern
2011 MSc in Earth Sciences, University of Bern
2008 BSc in Earth Sciences, University of Bern
2002 Apprenticeship as Chemical Laboratory Technician, Kantonales Laboratorium Bern

Research Interest

  • Development of recycling options for secondary raw materials
  • Optimisation of metal recovery from municipal solid waste incineration residues
  • Pollutant dynamics of bottom ash landfills
  • Elaboration of assessment criteria for legislation and enforcement based on the ecological and material-technical fundamentals.


Research group Mineralogy

Fachstelle für Sekundärrohstoffe


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Weibel, Gisela; Zappatini, Anna; Wolffers, Mirjam; Ringmann, Stefan (2021). Optimization of Metal Recovery from MSWI Fly Ash by Acid Leaching: Findings from Laboratory- and Industrial-Scale Experiments. Processes, 9(2), p. 352. MDPI 10.3390/pr9020352

Wolffers, Mirjam; Weibel, Gisela; Eggenberger, Urs (2021). Waste Wood Fly Ash Treatment in Switzerland: Effects of Co-Processing with Fly Ash from Municipal Solid Waste on Cr(VI) Reduction and Heavy Metal Recovery. Processes, 9(1), p. 146. MDPI 10.3390/pr9010146

Mehr, Jonas; Haupt, Melanie; Skutan, Stefan; Morf, Leo; Adrianto, Lugas Raka; Weibel, Gisela; Hellweg, Stefanie (2021). The environmental potential of enhanced metal recovery from dry municipal solid waste incineration bottom ash. Waste management, 119, pp. 330-341. Elsevier 10.1016/j.wasman.2020.09.001


Zucha, Wolfgang; Weibel, Gisela; Wolffers, Mirjam; Eggenberger, Urs (2020). Inventory of MSWI Fly Ash in Switzerland: Heavy Metal Recovery Potential and Their Properties for Acid Leaching. Processes, 8(12) MDPI 10.3390/pr8121668

Glauser, Andreas; Morf, Leo S.; Weibel, Gisela; Eggenberger, Urs (2020). Dataset on ten-years monitoring of MSWI bottom ashes in six MSWI plants in the Canton of Zürich, Switzerland. Data in brief, 32, p. 106261. Elsevier 10.1016/j.dib.2020.106261

Glauser, Andreas; Morf, Leo S.; Weibel, Gisela; Eggenberger, Urs (2020). Ten-years monitoring of MSWI bottom ashes with focus on TOC development and leaching behaviour. Waste management, 117, pp. 104-113. Elsevier 10.1016/j.wasman.2020.07.038


Quina, Margarida J.; Bontempi, Elza; Bogush, Anna; Schlumberger, Stefan; Weibel, Gisela; Braga, Roberto; Funari, Valerio; Hyks, Jiri; Rasmussen, Erik; Lederer, Jakob (2018). Technologies for the management of MSW incineration ashes from gas cleaning: New perspectives on recovery of secondary raw materials and circular economy. Science of the total environment, 635, pp. 526-542. Elsevier 10.1016/j.scitotenv.2018.04.150

Weibel, Gisela; Eggenberger, Urs; Dmitrii A., Kulik; Hummel, Wolfgang; Schlumberger, Stefan; Klink, Waldemar; Fisch, Martin; Mäder, Urs K. (2018). Extraction of heavy metals from MSWI fly ash using hydrochloric acid and sodium chloride solution. Waste management, 76, pp. 457-471. Elsevier 10.1016/j.wasman.2018.03.022


Weibel, Gisela; Eggenberger, Urs; Schlumberger, Stefan; Mäder, Urs (2017). Chemical associations and mobilization of heavy metals in fly ash from municipal solid waste incineration. Waste management, 62, pp. 147-159. Elsevier 10.1016/j.wasman.2016.12.004

Weibel, Gisela (2017). Optimized Metal Recovery from Fly Ash from Municipal Solid Waste Incineration. (Dissertation, Universität Bern, Philosophisch‐naturwissenschaftliche Fakultät)


Weibel, Gisela; Waber, Niklaus; Eggenberger, Urs; Mäder, Urs (2016). Influence of sample matrix on the alkaline extraction of Cr(VI) in soils and industrial materials. Environmental Earth Science, 75(7), pp. 548-562. Springer 10.1007/s12665-015-5236-3