Investigations concerning mechanisms and kinetics of the inorganic sulfur-bonding in acidified forest soils and identification of the solid-phases of sulfur


From 01/1995 to 12/1997

Principal Investigator: Stefan Peiffer
Grant: 0339476 B Vorhersage und Erklärung des Verhaltens und der Belastbarkeit von Ökosystemen unter veränderten Umweltbedingungen

Inorganic sulfur retention is an important process of acid-base chemistry of acid forest soils, yet the binding forms of retained S are not completely understood. Column experiments with the sand fraction of two rockforming minerals (albite and gibbsite) have been set up to study sulphate-retention-kinetics in water-saturated environments with various pH and various concentrations of Al3+ and SO42-. Temperature is kept constant at 10°C. We applied several instrumental analytical methods to identify solid phases of inorganic sulfur in acid forest soils. In preliminary experiments we successfully tested: Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), and Infrared Spectroscopy (IR). For these experiments we used untreated material and pretreated material that was allowed to react at 100°C for two hours with 0.1 N sulfuric acid. Additional methods are to be applied: Secondary Ion Mass Spectrometry (SIMS), Differential Thermal Analysis (DTA), X-ray Fluorescence Analysis (XFA), Atomic Force Microscopy (AFM) and Laser Microprobe Mass Analysis (LAMMA).

Upcoming ...

BayCEER Colloquium:
Th. 2023-04-06
Human-Wildlife Conflicts (HWC) in Southern Africa
We. 2023-03-01 now
Main FlussFilmFest 2023
We. 2023-03-22
Workshop Wassersensible Ernährung
Su. 2023-03-26
Aktionstag "Mein Main"
Ecological-Botanical Garden:
Su. 2023-04-02
Führung | Rosen-Seide & Soja-Kaschmir: Textilien von morgen
Weather research site
Luftdruck (356m): 974.9 hPa
Lufttemperatur: 10.9 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 9.2 km/h
Wind (Max.): 20.9 km/h
Windrichtung: W

Globalstrahlung: 88 W/m²
Lufttemperatur: 6.4 °C
Niederschlag: 0.4 mm/24h
Wind (Höhe 32m): 5.8 km/h

This site makes use of cookies More information