Investigations Concerning Mechanisms and Kinetics of the Inorganic Sulfur-Bonding in Acidified Forest Soils and Identification of the Solid-Phases of Sulfur - Part S9

Description: 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 sulfate-retention-kinetics in water-saturated environments with various pH and various concentrations of Al3+ and SOtief4hoch2-. Temperature is kept constant at 10 degC. 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 degC 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).

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Origins: /Bund/UBA/UFORDAT

Tags: Fichtelgebirge ? Aluminiumsulfat ? Schwefelverbindung ? Sulfat ? Sand ? Laser ? Schwefelsäure ? Schwefel ? Chemische Analyse ? Anorganische Verbindung ? Waldboden ? Anorganische Säure ? Bodenbelastung ? Analyseverfahren ? Bodenprobe ? Bodenuntersuchung ? Bodenversauerung ? Terrestrisches Ökosystem ? pH-Wert ? Studie ? Bodenschadstoff ? Mineral ? Schadstoffakkumulation ? Wald ? Laboruntersuchung ? Differential-Thermal-Analysis ? IR-Spektroskopie ? Atomic-Force-Microscopy ? Ionen ? Nordostbayern ? Reaktionskinetik ? Retention [Wasserwirtschaft] ? Scanning-Electron-Microscopy ? Schwefel-Festphase ? Secondary-Ion-Mass-Spectrometry ? Speziation [Chemie] ? X-Ray-Diffraction ? X-Ray-Fluorescence-Analysis ? X-Ray-Photoelectron-Spectroscopy ?

Region: Bavaria

Bounding boxes: 11.5° .. 11.5° x 49° .. 49°

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License: cc-by-nc-nd/4.0

Language: Englisch/English

Organisations

• Bundesministerium für Forschung, Technologie und Raumfahrt (Finanzielle Förderung)
• Umweltbundesamt (Bereitstellung)
• Universität Bayreuth, Bayreuther Institut für Terrestrische Ökosystemforschung, Abteilung für Bodenphysik (Mitwirkung)
• Universität Bayreuth, Fakultät für Biologie, Chemie und Geowissenschaften, Fachgruppe Geowissenschaften, Lehrstuhl für Hydrologie (Mitwirkung)
• Universität Bayreuth, Lehrstuhl für Bodenkunde und Bodengeographie (Projektverantwortung)

Time ranges: 1995-01-01 - 1997-12-31

Status

Aktiv

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