Michael Kersten
University of Hamburg
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Michael Kersten.
Archive | 1990
Ulrich Förstner; Wolfgang Ahlf; Wolfgang Calmano; Michael Kersten
The role of sediments as carriers and potential sources of contaminants is reviewed. A program of sediment studies will normally consist of a series of objectives of increasing complexity, each drawing part of its information from the preceding data base. The study of dated sediment cores has proven particulary useful as it provides a historical record of the various influences on the aquatic system by indicating both the natural background levels and the man-induced accumulation of pollutants over an extended period of time. Since adsorption of pollutants onto particles is a primary factor in determining the transport, deposition, reactivity, and potential toxicity of these materials, analytical methods should be related to the chemistry of the particle’s surface and/or to the pollutant species highly enriched on the surface.
Archive | 1986
Ulrich Förstner; Wolfgang Ahlf; Wolfgang Calmano; Michael Kersten; Wim Salomons
Solubility, mobility, and bioavailability of sediment-bound metals can be increased by four major factors: (1) Lowering of pH; (2) changing of redox conditions; (3) formation of organic complexes; and (4) increasing salinity. While the first two factors are particularly important for on-land deposition of dredged materials, the effect of salinity is particularly important for resuspended cadmium-rich sediments in estuaries. Chemical extraction studies, which were carried out under carefully controlled conditions on both fresh and freeze-dried samples, indicate that aeration of anoxic sediments (e.g., on-land disposal) may both increase and decrease the mobility of heavy metals. Transformation from sulfidic or carbonatic associations to oxidic phases will reduce mobility of manganese, wherease the respective changes from moderately reducible forms to carbonatic and easily reducible phases will enhance the reactivity of zinc during oxidation of dredged material.
Vom Wasser | 1985
Michael Kersten; Ulrich Förstner; Wolfgang Calmano; Wolfgang Ahlf
Le depot de boues reduites dans les estuaires doit etre evite ainsi que la dispersion de sediments contamines dans des eaux peu profondes
Vom Wasser | 1989
Ulrich Förstner; Wolfgang Calmano; Wolfgang Ahlf; Michael Kersten
Developpement de criteres biologiques et chimiques pour caracteriser la qualite des sediments dans les milieux aquatiques
Archive | 1990
Ulrich Förstner; Wolfgang Ahlf; Wolfgang Calmano; Michael Kersten
Archive | 1989
Ulrich Förstner; Michael Kersten; Reinhard Wienberg
Archive | 1994
Ulrich Förstner; Wolfgang Calmano; Jihua Hong; Michael Kersten
Toxicological & Environmental Chemistry | 1986
Wolfgang Calmano; Ulrich Förstner; Michael Kersten
Archive | 1986
Wolfgang Calmano; Ulrich Förstner; Michael Kersten; D. Krause
Acta Hydrochimica Et Hydrobiologica | 1987
Ulrich Förstner; Michael Kersten; Wolfgang Calmano