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

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

2017

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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

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Kronberg, Rose-Marie
Drott, Andreas
Jiskra, Martin; et al.

Forest harvest contribution to Boreal freshwater methyl mercury load
Global Biogeochemical Cycles, 30(6): 825-843

2016

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Hakobyan, Shoghik
Rzhepishevska, Olena
Björn, Erik; et al.

Influence of Chelation Strength and Bacterial Uptake of Gallium Salicylidene Acylhydrazide on Biofilm Formation and Virulence by Pseudomonas aeruginosa
Journal of Inorganic Biochemistry, 160: 24-32

2016

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Kozyatnyk, Ivan
Bouchet, Sylvain
Björn, Erik; et al.

Fractionation and size-distribution of metal and metalloid contaminants in a polluted groundwater rich in dissolved organic matter
Journal of Hazardous Materials, 318: 194-202

2016

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Isidorova, Anastasija
Bravo, Andrea G.
Riise, Gunnhild; et al.

The effect of lake browning and respiration mode on the burial and fate of carbon and mercury in the sediment of two boreal lakes
Journal of Geophysical Research - Biogeosciences, 121(1): 233-245

2016

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Kronberg, Rose-Marie
Jiskra, Martin
Weiderhold, Jan. G; et al.

Methyl Mercury Formation in Hillslope Soils of Boreal Forests: the Role of Forest Harvest and Anaerobic Microbes
Environmental Science and Technology, 50(17): 9177-9186

2016

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Liem-Nguyen, Van
Jonsson, Sofi
Skyllberg, Ulf; et al.

Effects of Nutrient Loading and Mercury Chemical Speciation on the Formation and Degradation of Methylmercury in Estuarine Sediment
Environmental Science and Technology, 50(13): 6983-6990

2016

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Edo, Mar
Björn, Erik
Persson, Per-Erik; et al.

Assessment of chemical and material contamination in waste wood fuels: a case study ranging over nine years
Waste Management, 49: 311-319

2016

Hämta

Ramstedt, Madeleine
Hedlund, Tomas
Björn, Erik; et al.

Rethinking chemistry in higher education towards technology-enhanced problem-based learning
Education Inquiry, 7(2): 115-135

2016

Hämta


Sidansvarig: Erik Björn
2017-01-27

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