By Georg Matthess (auth.), Professor Dr. G. Matthess, Professor Dr. F. Frimmel, Professor Dr. P. Hirsch, Professor Dr. H. D. Schulz, Professor Dr. H.-E. Usdowski (eds.)
Earth scientists, who've labored jointly for six years within the precedence seasoned gram "Hydrogeochemical tactics within the Hydrological Cycle in the Unsaturated and Saturated Zones", have summarized the result of their learn during this quantity. this can be the party to take inventory after which glance forward. the concern application used to be manage through the Senate of The Deutsche Forschungsgemeinschaft in October 1981. This was once preceded via long and cautious practise through a software Committee, and used to be eventually recom mended by means of the Senate fee for Joint study in Earth Sciences. the most goal was once the interdisciplinary examine of geochemical tactics in typical platforms within the overall underground water cycle, wherein water pollutants used to be to not be thought of. formally all started on 1 September 1982, this system has got a provide of DM 10. nine Mio. from the DFG, and this has enabled it to aid a complete of fifty initiatives. even supposing firstly, practice-oriented tasks, that have been funded in different places, weren't to be incorporated, the various effects are acceptable. The 4 different types offered have been investigated with differ ing depth. An early focus on definite consultant fields of size and examine components proved to be the appropriate method - this shunned a waste of attempt in different fields. through the interval of the concern software, new and topical questions arose, e. g.
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Additional info for Progress in Hydrogeochemistry: Organics — Carbonate Systems — Silicate Systems — Microbiology — Models
The practical aspects of this research have demanded the development of special hydrochemical methods, such as methods for the analysis of silicic acid derivatives, carbon and nitrogen compounds and organic metal complexes, and methods for the characterization of thin sediment layers (coatings) on mineral surfaces. In addition, methods had to be developed and tested for recording the number and activity of the various groups of geochemically significant microorganisms. The aim of this priority programme was to coordinate the work of scientists from different disciplines in order to produce a combined effort to develop material transport and material change models based on hydraulic, physico-chemical and microbiological principles which will allow the study of the flow of materials in the subsurface sections of the water cycle.
Differences are also found for soil samples which were extracted with different procedures. So the spectral absorbance in the range of 300 to 200 nm is steeper for MUC 1 FA, MUC 2-1 FA and MUC 2-2 FA. The shapes ofthe UV spectra ofMUC 2-2 FA and MUC 2-2 GRA FA are fairly similar. In addition, the spectra of BOC 1 are steeper in UV region compared with BOC 3. The extraction procedures obviously mobilize different substances responsible for different UV absorption because all spectra were obtained for samples with similar DOC concentrations.
HS can interact with a number of inorganic and organic water constituents. Synthetic organic compounds (SYOC) as environmental pollutants can be complexed. As a consequence, there is a change in their physical and chemical properties which leads to a changed behaviour in the environment. For example, the water solubility of micropollutants can be enhanced by HS (Chiou et al. 1990). Even though there are practically no data available, it is reasonable to assume that the toxicity of organics to microorganisms will also be influenced by HS.