Marcelo Ketzer
ProfessorI am a professor in sustainability sciences with focus on sedimentary and environmental geochemistry at the Department of Biology and Environmental Science. My current research interests are on the chemistry of sediments and soils (and related pore waters and gases) in their pristine state and when altered by human activities. I am also interested in the relationships between life and chemistry in geological environments.
Teaching
I am involved in teaching geosciences, climate change, and environmental science in the Environmental Analyst Programme (undergraduate level) and in the Environmental Science and Sustainability Programme (master level). Both programmes are in the Faculty of Life and Health Sciences.
Research
I am participating of several research projects with focus on the response of natural systems to climate change. We are investigating, for instance, how climate change may affect biogeochemical cycles in sediments of the Baltic Sea and, therefore, how environmental conditions (such as oxygen levels) may be modified in the future. Understanding the natural systems and how they are affected by climate change will be important to plan for remediation actions in a global warming scenario. Another important consequence of climate change to the marine environment is the stability of large reservoirs of methane trapped as gas hydrates in deep sea. The stability of such systems is sensitive to glacial- interglacial changes in water pressure (sea-level) and temperature, but also to the poorly understood dynamics of venting structures observed to release gas to the oceans. An improved understanding of gas release over time is of wide scientific and social relevance, due to its impacts on global carbon budgets, marine life, seabed slope stability and resource assessments. I am participating of research projects in the Amazon deep-sea fan and in the Rio Grande Cone (Atlantic Ocean), and in the Baltic Sea and Mediterranean Sea.
News
- Increased amount of methane gas expected to be released from seafloor as oceans get warmer due to climate change News
- Marcelo is on expedition in the Mediterranean Sea to study how gas in the ocean floor can trigger a tsunami News
- Massive release of methane gas from the seafloor linked to global warming discovered for the first time in the Southern Hemisphere News
- Environmental researchers from Linnaeus University map out marine pollution in the Baltic Sea News
My ongoing research projects
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Project: Consequences of climate change in a Baltic Sea bay exposed to 50 years of warming Today, there is little knowledge of the consequences of global warming on Baltic Sea ecosystems and aquatic…
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Project: Contamination of water resources in southern Sweden by iron and aluminium Contamination of water resources by metals is a matter of concern in areas where acid sulphate soils exist. Our…
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Project: Metal accumulation in the Baltic Sea sediments: implications for environmental monitoring programs and mitigation actions The load of trace metals to Baltic Sea waters and their accumulation…
Publications
Article in journal (Refereed)
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Seidel, L., Ketzer, J.M., Broman, E., Shahabi-Ghahfarokhi, S., Rahmati-Abkenar, M., et al. (2022). Weakened resilience of benthic microbial communities in the face of climate change. ISME Communications. 2 (1).
Status: Published -
Shahabi-Ghahfarokhi, S., Rahmati-Abkenar, M., Matson, J.G., Karimi, H., Yu, C., et al. (2022). Removal and potential recovery of dissolved metals from acid sulfate soil drainage by spent coffee-grounds and dissolved organic carbon. Environmental Advances. 8.
Status: Published -
Proenca, A.M., Oliveira, M.M., Neves, P.F.R., Giongo, A., De Oliveira, R.R., et al. (2022). Genomic, biochemical, and phylogenetic evaluation of bacteria isolated from deep-sea sediment harboring methane hydrates. Archives of Microbiology. 204 (4).
Status: Published -
Shahabi-Ghahfarokhi, S., Åström, M.E., Yu, C., Lindquist, T., Djerf, H., et al. (2022). Extensive dispersion of metals from hemiboreal acid sulfate soil into adjacent drain and wetland. Applied Geochemistry. 136.
Status: Published -
Westmeijer, G., Mehrshad, M., Turner, S., Alakangas, L., Sachpazidou, V., et al. (2022). Connectivity of Fennoscandian Shield terrestrial deep biosphere microbiomes with surface communities. Communications Biology. 5 (1).
Status: Published -
Santos, V.H.J.M.D., Engelmann, P.D.M., Marconatto, L., Borge, L.G.D.A., Palhano, P.D.L., et al. (2022). Exploratory analysis of the microbial community profile of the municipal solid waste leachate treatment system : A case study. Waste Management. 141. 125-135.
Status: Published -
Stranne, C., O’regan, M., Hong, W., Brüchert, V., Ketzer, J.M., et al. (2022). Anaerobic oxidation has a minor effect on mitigating seafloor methane emissions from gas hydrate dissociation. Communications Earth & Environment. 3 (1).
Status: Published -
Shahabi-Ghahfarokhi, S., Rahmati-Abkenar, M., Jaeger, L., Josefson, S., Djerf, H., et al. (2022). The response of metal mobilization and redistribution to reoxygenation in Baltic Sea anoxic sediments. Science of the Total Environment. 837.
Status: Published -
Rahmati-Abkenar, M., Alizadeh, M., Ketzer, J.M. (2021). A New Dynamic Modeling Approach to Predict Microbial Methane Generation and Consumption in Marine Sediments. Energies. 14 (18).
Status: Published -
Shahabi-Ghahfarokhi, S., Åström, M.E., Josefsson, S., Apler, A., Ketzer, J.M. (2021). Background concentrations and extent of Cu, As, Co, and U contamination in Baltic Sea sediments. Journal of Sea Research. 176.
Status: Published -
Shahabi-Ghahfarokhi, S., Josefsson, S., Apler, A., Kalbitz, K., Åström, M.E., et al. (2021). Baltic Sea sediments record anthropogenic loads of Cd, Pb, and Zn. Environmental Science and Pollution Research. 28. 6162-6175.
Status: Published -
Vernooij, R., Siqueira, T.D.A., Hangx, S., Spiers, C., Ketzer, J.M., et al. (2021). CO2‐water‐rock interactions in undeformed and sheared claystone caprocks from Northern Europe. Greenhouse Gases : Science and Technology. 11 (2). 232-250.
Status: Published -
Pires, J.P., Ramos, A.D.S., Mattos, C.F., Ketzer, J.M., Lourega, R.V. (2021). Analysis of the Effect of Organic Salts Derived from L-Phenylalanine Amino Acid as Kinetic Promoters/Inhibitors of CO2 Hydrates. Energy & Fuels. 35 (9). 8095-8101.
Status: Published -
Giongo, A., Dos Anjos Borges, L.G., Marconatto, L., Palhano, P.D.L., Serbent, M.P., et al. (2020). Adaption of microbial communities to the hostile environment in the Doce River after the collapse of two iron ore tailing dams. Heliyon. 6 (8). 1-16.
Status: Published -
Ketzer, J.M., Praeg, D., Rodrigues, L.F., Augustin, A., Pivel, M.A.G., et al. (2020). Gas hydrate dissociation linked to contemporary ocean warming in the southern hemisphere. Nature Communications. 11 (1). 1-9.
Status: Published -
Rodrigues, L.F., Macario, K.D., Anjos, R.M., Ketzer, J.M., Maraschin, A.J., et al. (2020). Origin and alteration of organic matter in hydrate-bearing sediments of the Rio Grande Cone, Brazil : evidence from biological, physical, and chemical factors.. Radiocarbon. 62 (1). 197-206.
Status: Published -
Giongo, A., Haag, T., Medina-Silva, R., Heemann, R., Pereira, L.M., et al. (2020). Distinct deep subsurface microbial communities in two sandstone units separated by a mudstone layer. Geosciences Journal. 24. 267-274.
Status: Published -
Braga, R., Iglesias, R.S., Romio, C., Praeg, D., Miller, D., et al. (2020). Modelling methane hydrate stability changes and gas release due to seasonal oscillations in bottom water temperatures on the Rio Grande cone, offshore southern Brazil. Marine and Petroleum Geology. 112. 1-15.
Status: Published -
Da Silva Ramos, A., Pires, J.P., Ketzer, J.M., De Araujo, G.E., Lourega, R.V. (2020). Synthesis of new CO2 hydrate inhibitors. Journal of Natural Gas Science and Engineering. 75. 1-6.
Status: Published -
Ramos, A.D.S., Pires, J.P., Ketzer, J.M., Lourega, R.V. (2020). Organic salts as kinetic and thermodynamic inhibitors for CO2 hydrate precipitation. Journal of Natural Gas Science and Engineering. 82. 1-8.
Status: Published -
Ketzer, J.M., Praeg, D., Pivel, M., Augustin, A., Rodrigues, L.F., et al. (2019). Gas Seeps at the Edge of the Gas Hydrate Stability Zone on Brazil’s Continental Margin. Geosciences. 9 (5). 1-11.
Status: Published -
Rodrigues, L., Ketzer, J.M., Oliveira, R., Dos Santos, V., Augustin, A., et al. (2019). Molecular and Isotopic Composition of Hydrate-Bound, Dissolved and Free Gases in the Amazon Deep-Sea Fan and Slope Sediments, Brazil. Geosciences. 9 (2). 1-15.
Status: Published -
Rodrigues, L.F., Ramos, A., De Araujo, G., Silveira, E., Ketzer, J.M., et al. (2019). High-Pressure and Automatized System for Study of Natural Gas Hydrates. Energies. 12 (16).
Status: Published -
Tharimela, R., Augustin, A., Ketzer, J.M., Cupertino, J., Miller, D., et al. (2019). 3D CSEM imaging of gas hydrates : insights from the Pelotas Basin, offshore Brazil.. Interpretation. 7 (4). SH111-SH131.
Status: Published -
Cedeno, D.G., Conceicao, R.V., Wilbert De Souza, M.R., Schimdt Quinteiro, R.V., Carniel, L.C., et al. (2019). An experimental study on smectites as nitrogen conveyors in subduction zones. Applied Clay Science. 168. 409-420.
Status: Published -
Stranne, C., O’regan, M., Jakobsson, M., Brüchert, V., Ketzer, J.M. (2019). Can anaerobic oxidation of methane prevent seafloor gas escape in a warming climate?. Solid Earth. 10 (5). 1541-1554.
Status: Published -
Ketzer, J.M., Augustin, A., Rodrigues, L.F., Oliveira, R., Praeg, D., et al. (2018). Gas seeps and gas hydrates in the Amazon deep-sea fan. Geo-Marine Letters. 38 (5). 429-438.
Status: Published -
Engelmann, P.D.M., Dos Santos, V.H.J.M., Barbieri, C.B., Augustin, A.H., Ketzer, J.M., et al. (2018). Environmental monitoring of a landfill area through the application of carbon stable isotopes, chemical parameters and multivariate analysis. Waste Management. 76. 591-605.
Status: Published -
Medina-Silva, R., De Oliveira, R.R., Pivel, M.A.G., Borges, L.G.A., Simao, T.L.L., et al. (2018). Microbial diversity from chlorophyll maximum, oxygen minimum and bottom zones in the southwestern Atlantic Ocean. Journal of Marine Systems. 178. 52-61.
Status: Published -
Iglesias, R.S., Ketzer, J.M., Maraschin, A.J., Sbrissa, G. (2018). Characterization and modeling of CO2‐water‐rock interactions in Hygiene Sandstones (Upper Cretaceous), Denver Basin, aimed for carbon dioxide geological storage. Greenhouse Gases : Science and Technology. 8 (4). 781-795.
Status: Published -
Da S. Ramos, A., De Araujo, G.E., Siviero, L., Ketzer, J.M., Heemann, R., et al. (2018). Comparative assessment between different sample preparation methodologies for PTGA CO2 adsorption assays—Pellet, powder, and fragment samples. Adsorption Science and Technology. 36 (7-8). 1441-1455.
Status: Published -
Schütz, M.K., Lopes, N.F., Cenci, A., Ketzer, J.M., Einloft, S., et al. (2018). Influence of Alkaline Additives and Buffers on Mineral Trapping of CO2 under Mild Conditions. Chemical Engineering & Technology. 41 (3). 573-579.
Status: Published -
Müller Bicca, M., Philipp, R.P., Jelinek, A.R., Ketzer, J.M., Dos Santos Scherer, C.M., et al. (2017). Permian-Early Triassic tectonics and stratigraphy of the Karoo Supergroup in northwestern Mozambique. Journal of African Earth Sciences. 130. 8-27.
Status: Published -
Engelmann, P.D.M., Dos Santos, V.H.J.M., Moser, L.I., Do Canto Bruzza, E., Barbieri, C.B., et al. (2017). Environmental monitoring of water resources around a municipal landfill of the Rio Grande do Sul state, Brazil. Environmental Science and Pollution Research. 24 (26). 21398-21411.
Status: Published -
Dos Santos, V.H.J.M., Ketzer, J.M., Rodrigues, L.F. (2017). Classification of Fuel Blends Using Exploratory Analysis with Combined Data from Infrared Spectroscopy and Stable Isotope Analysis. Energy & Fuels. 31 (1). 523-532.
Status: Published -
Medina-Silva, R., Oliviera, R.R., Trindade, F.J., Borges, L.G.A., Simao, T.L.L., et al. (2017). Microbiota associated with tubes of Escarpia sp. from cold seeps in the southwestern Atlantic Ocean constitutes a community distinct from that of surrounding marine sediment and water. Antonie van Leeuwenhoek. International Journal of General and Molecular Microbiology. 111 (4). 533-550.
Status: Published -
Rodrigues, L.F., Ketzer, J.M., Lourega, R.V., Augustin, A.H., Sbrissa, G., et al. (2017). The influence of methane fluxes on the sulfate/methane interface in sediments from the Rio Grande Cone Gas Hydrate Province, southern Brazil : A influência dos fluxos de metano na interface sulfato/metano em sedimentos de hidrato de gás do Cone do Rio Grande, Sul do Brasil. Brazilian Journal of Geology. 47 (3). 369-381.
Status: Published -
Siqueira, T.A., Iglesias, R.S., Ketzer, J.M. (2017). Carbon dioxide injection in carbonate reservoirs : a review of CO2-water-rock interaction studies. Greenhouse Gases : Science and Technology. 7 (5). 802-816.
Status: Published -
Dos Santos, V.H.J.M., Ramos, A.S., Pires, J.P., Engelmann, P.D.M., Lourega, R.V., et al. (2017). Discriminant analysis of biodiesel fuel blends based on combined data from Fourier Transform Infrared Spectroscopy and stable carbon isotope analysis. Chemometrics and Intelligent Laboratory Systems. 161. 70-78.
Status: Published -
Giongo, A., Haag, T., Lopes Simao, T.L., Medina-Silva, R., Utz, L.R.P., et al. (2016). Discovery of a chemosynthesis-based community in the western South Atlantic Ocean. Deep Sea Research Part I : Oceanographic Research Papers. 112. 45-56.
Status: Published -
Ramos, A.D.S., Rodrigues, L.F., De Araujo, G.E., Pozocco, C.T.M., Ketzer, J.M., et al. (2015). Geochemical Characterization of Irati And Palermo Formations (Parana Basin-Southern Brazil) for Shale Oil/Gas Exploration. Energy Technology. 3 (5). 481-487.
Status: Published -
Iglesias, R.S., Ketzer, J.M., Melo, C.L., Heemann, R., Machado, C.X. (2015). Carbon capture and geological storage in Brazil : an overview. Greenhouse Gases : Science and Technology. 5 (2). 119-130.
Status: Published -
Miller, D.J., Ketzer, J.M., Viana, A.R., Kowsmann, R.O., Freire, A.F.M., et al. (2015). Natural gas hydrates in the Rio Grande Cone (Brazil) : A new province in the western South Atlantic. Marine and Petroleum Geology. 67. 187-196.
Status: Published -
Rodrigues, L., Goudinho, F., Laroque, D., Lourega, R., Heemann, R., et al. (2014). An Alternative Gas Chromatography Setting for Geochemical Analysis.. Journal of Chemical Engineering & Process Technology. 5.
Status: Published -
Santarosa, C.S., Crandall, D., Haljasmaa, I.V., Hur, T., Fazio, J.J., et al. (2013). CO2 sequestration potential of Charqueadas coal field in Brazil. International Journal of Coal Geology. 106. 25-34.
Status: Published
Doctoral thesis, comprehensive summary (Other academic)
- Ketzer, J.M. (2002). Diagenesis and Sequence Stratigraphy : an integrated approach to constrain evolution of reservoir quality in sandstones. Doctoral Thesis. Uppsala, Acta Universitatis Upsaliensis.
Chapter in book (Refereed)
- Praeg, D., Migeon, S., Mascle, J., Unnithan, V., Ketzer, J.M. (2022). A Gas Hydrate System of Heterogeneous Character in the Nile Deep-Sea Fan. World Atlas of Submarine Gas Hydrates in Continental Margins. Springer. 437-447.
- Ketzer, J.M., Viana, A., Miller, D., Augustin, A., Rodrigues, F., et al. (2022). Gas Hydrate Systems on the Brazilian Continental Margin. World Atlas of Submarine Gas Hydrates in Continental Margins. Springer Nature. 343-352.
- Ketzer, J.M., Iglesias, R., Einloft, S. (2017). Reducing Greenhouse Gas Emissions with CO2 Capture and Geological Storage.. Handbook of climate change mitigation and adaptation.. Springer. 2197-2237.
Manuscript (preprint) (Other academic)
Patent (Other (popular science, discussion, etc.))
- Steiger, A.K., Ketzer, J.M. (2015). Equipment and process to manipulate and transfer fluid samples collected at high pressure (deep sea)..
- Silva, I., Ketzer, J.M., Steiger, A. (2014). Device for collecting sample of fluids in underwater medium..
Collection (editor) (Other (popular science, discussion, etc.))
- Ketzer, J.M., Machado, C., Rockett, G., Iglesias, R. (2016). Brazilian Atlas of CO2 Capture and Geological Storage : Atlas Brazileiro de Captura e Armazenamento Geologico de CO2. EDIPUCRS. 95.