ISSN:0323-4320    

DOI:10.1002/aheh.19850130402

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractThe hardness quotient according to WANDTas a quotient from carbonate hardness and non‐carbonate hardness is used for the characterization of groundwater by its “age” and thus as an indicator of the risk of contamination. Due to its application, statements on the risk of nitrate‐carrying groundwaters and on the age of the ammonium loading of groundwater are possible. With the aid of the hardness quotient it is proved that most of the nitrate‐carrying sites produce “air‐covered” groundwater and thus are riskful, while a high percentage of the ammonium found in the groundwater of the Neubrandenburg country is of geogenic origin and not due to fres

ISSN:0323-4320    

DOI:10.1002/aheh.19850130403

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractA relation is derived for the calculation of unknown selectivity coefficients from unknown values of tertiary reactions and its validity is proved by experimental investigations of the systems H+/Na+/Ca2+, H+/Na+/Co2+and H+/Na+/Al3+at the strongly acid cation exchanger Wofatit KPS.

ISSN:0323-4320    

DOI:10.1002/aheh.19850130404

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractThe assessment of the quality of a water is based on the findings of chemical, physical and biological investigations. The safety of statement is determined by the uncertainty of data and the stochastics of the observed conversion processes. The description of the probability distribution is the basis for the increasing of the safety of interpretation. Stationary distribution functions are determined with the aid of the results of routine investigations on selected flowing water gauge stations. For that, the frequency distributions are evaluated graphically. Moreover, the computer aided adaptation of water quality values is investigated by a power normal distribution (PN), the Johnson distribution and the LN‐3 distribution. The discussion by examples of several partly flow‐dependent water quality values leads to the recommendation of the testing of stationary distributions as a basis of the aquatic ecosystem analysis and a secured water quality managem

ISSN:0323-4320    

DOI:10.1002/aheh.19850130405

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractThe present state of the above mentioned points, inclusive of the determination of the degree of exhaustion and of the effect of regeneration is described and the respective methods of investigation are briefly explained. The statements made in this article constitute the contents of two drafts of respective special‐field standards concerning “water purification carb

ISSN:0323-4320    

DOI:10.1002/aheh.19850130406

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractAfter their extraction from water, 16 water pollutants of the families of triazines, urea herbicides, phenoxycarboxylic acids and organochlorine and organophosphorus insecticides are separated and identified by thin‐layer chromatography. The method is suitable for routine analyses and was tested on model waters, inclusive of water from the Elbe river. The rate of redetection is up to 80%, the detection limit is at 0.5… 2 μg of the individual pollut

ISSN:0323-4320    

DOI:10.1002/aheh.19850130407

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractStructure/reactivity relations are investigated experimentally and theoretically for the microbial degradation of 35 substituted phenols and anilines by adapted mixed cultures of bacteria. From the results one can conclude that the initial attack of the aromatic nucleus has an electrophilic character and is ratelimiting. The results are suitable for predictions of biodegradation rates of organic compounds and facilitate understanding of the mechanism of degradation.

ISSN:0323-4320    

DOI:10.1002/aheh.19850130408

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractThe experimental investigations were carried out on drill‐core samples in dynamical filtration tests with air‐saturated and oxygen‐gassed water. The description of the oxygen depletion, to which reactions with different rates contribute, is possible with regression equations as well as with balance equations. The first ones are suitable mainly for short‐time predictions, while the latter ones, for long‐term predictions. For a transfer to underground plants the temperature dependence of the rate of reaction should be taken int

ISSN:0323-4320    

DOI:10.1002/aheh.19850130409

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractResults of investigations on the basis of series of measurements having been performed for many years on the electrolytic conductivity in several waters with different degrees of pollution have shown a good correlation between residue from evaporation and conductivity. For concentrations of more than 2500 mg/l chloride these functional relations loose their validity. Because of this finding, the routine investigations of the residue from evaporation in the laboratory were stopped. Comparative measurements of residue from evaporation and conductivity which were repeated after a few years indicated deviations between 0.5 and 8 %. Limited artificial additions of salt, acid, base and thawing salt caused linear changes of the conductivity of the water samples, so that in continuous water quality control systems respective disturbances will be automatically signalled and transmitted and the extent of the pollution can be determined quantitatively with the aid of integral calculus.

ISSN:0323-4320    

DOI:10.1002/aheh.19850130410

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractAfter a short description of the morphology and mode of life as well as the distribution of Amoebina, ecological statements are made for 14 taxa, and for 32 species, which are depicted too, their integration in the saprobic system, inclusive of the indicative weight, is stated.

ISSN:0323-4320    

DOI:10.1002/aheh.19850130411

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY