Erik Björn: Trace element speciation analysis-biogeochemical processes & metallomics of trace element compounds

The research concerns fundamental aspects, methodological developments and applications of speciation analysis of trace elements in environmental, biological and industrial samples.

Erik BjörnThe main objective is to provide fundamental understanding of chemical speciation, mechanisms and rate of reactions and interactions in the aquatic and terrestrial environments as well as in biological systems. The research is focused on formation of mobile and bioavailable forms of Hg in aquatic environments as well as fluxes and metabolism of Pt-containing chemotherapeutic substances in malignant cells.

Research group:
Post-doctoral researchers: Lars Lambertsson, Gbotemi Adediram, Whei Zhu, Liem Nguyen Van
Ph.D. Students: Aleksandra Skrobonja

The overall objective with the research is to develop new powerful analytical techniques and methods for studies of trace element compounds’ biogeochemical processes in aquatic environments and metabolism in human cells.

We develop analytical methods and experimental strategies to determine; molecular structures of unknown trace metal compounds, concentrations of compounds and rate constants for their formation and degradation. We carry out experimental studies on both controlled model systems of varying complexity and complex natural systems at realistic conditions. The methods are based on state of the art techniques using stable enriched isotope tracers and chromatographic separations coupled to advanced elemental and molecular mass spectrometry techniques. Further we apply, in co-operation with our partners, in-house and synchrotron based spectroscopic measurement techniques as well as thermodynamic and kinetic modeling approaches to further assess chemical speciation and reactions. We use these measurement and modeling approaches in multi-disciplinary research projects where analytical chemistry is closely integrated with biogeochemistry, ecology, biochemistry and medicine sciences for advanced studies in the various experimental systems.

Publikationer

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Eklöf, Karin
Bishop, Kevin
Bertilsson, Stefan; et al.

Formation of mercury methylation hotspots as a consequence of forestry operations
Science of the Total Environment, 613-614: 1069-1078

2018

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Herrero Ortega, Sonia
Catalan, Núria
Björn, Erik; et al.

High methylmercury formation in ponds fueled by fresh humic and algal derived organic matter
Limnology and Oceanography, 63: S44-S53

2018

Hämta

Kronberg, Rose-Marie
Schaefer, Jeffra K.
Björn, Erik; et al.

Mechanisms of Methyl Mercury Net Degradation in Alder Swamps: The Role of Methanogens and Abiotic Processes
Environmental Science and Technology Letters, 5(4): 220-225

2018

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Zhu, Wei
Song, Yu
Adediran, Gbotemi A.; et al.

Mercury transformations in resuspended contaminated sediment controlled by redox conditions, chemical speciation and sources of organic matter
Geochimica et Cosmochimica Acta, 220: 158-179

2018

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Soerensen, A. L.
Schartup, A. T.
Skrobonja, Aleksandra; et al.

Organic matter drives high interannual variability in methylmercury concentrations in a subarctic coastal sea
Environmental Pollution, 229: 531-538

2017

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Östman, Marcus
Lindberg, Richard H.
Fick, Jerker; et al.

Screening of biocides, metals and antibiotics in Swedish sewage sludge and wastewater
Water Research, 115: 318-328

2017

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Jiang, Tao
Skyllberg, Ulf
Björn, Erik; et al.

Characteristics of dissolved organic matter (DOM) and relationship with dissolved mercury in Xiaoqing River-Laizhou Bay estuary, Bohai Sea, China
Environmental Pollution, 223: 19-30

2017

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Liem-Nguyen, Van
Skyllberg, Ulf
Björn, Erik

Thermodynamic modelling of the chemical speciation of mercury and methylmercury under sulfidic conditions in boreal wetland soils

2017

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Bravo, Andrea G.
Bouchet, Sylvain
Tolu, Julie; et al.

Molecular composition of organic matter controls methylmercury formation in boreal lakes
Nature Communications, 8

2017

Hämta

Jonsson, Sofi
Andersson, Agneta
Nilsson, Mats B.; et al.

Terrestrial discharges mediate trophic shifts and enhance methylmercury accumulation in estuarine biota
Science Advances, 3(1)

2017

Hämta


Sidansvarig: Erik Björn

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