Till umu.se

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

Författare

Titel

År sorteringsordning

Fulltext

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(Supplement C): 531-538

2017

-

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

-

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

-

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

-

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

-

Liem-Nguyen, Van
Skyllberg, Ulf
Björn, Erik

Thermodynamic Modeling of the Solubility and Chemical Speciation of Mercury and Methylmercury Driven by Organic Thiols and Micromolar Sulfide Concentrations in Boreal Wetland Soils
Environmental Science and Technology, 51(7): 3678-3686

2017

-

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

-

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

-

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

-


Sidansvarig: Erik Björn

Utskriftsversion