European Environmental Research Organization (EERO)     

Alexander J. B. Zehnder 《GeoJournal》1990,22(4):438-438

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Hydrophobic and electrostatic parameters in bacterial adhesion   总被引：5，自引：0，他引：5  

Mark C. M. van Loosdrecht  Willem Norde  Johannes Lyklema  Alexander J. B. Zehnder 《Aquatic Sciences - Research Across Boundaries》1990,52(1):103-114

Recently it has been shown that the initial stages of bacterial adhesion to a model-surface of sulphated polystyrene can best be described using hydrophobic and electrostatic parameters. In the present study it is tested whether these parameters can generally be applied to predict bacterial adhesion by using (i) glass, as a model for hydrophilic and natural surfaces of silicates and oxides, (ii) polystyrene coated with proteins, as a model for a surface coated with an organic layer, and (iii) river Rhine sediment, as an example of a natural surface. Adhesion to glass was dominated by electrostatic interaction, whereas adhesion to polystyrene coated with various types of proteins depended on the surface characteristics of the bacteria and the type of protein. By relating Van der Waals interactions to hydrophobicity of the interacting species, the adhesion of bacteria to the various surfaces including the river Rhine sediments could be interpreted in terms of the DLVO-theory. It is therefore concluded that the conceptual principles of the DLVO-theory (interplay of Van der Waals and electrostatic interactions) are suitable to describe, at least qualitatively, the initial processes of bacterial adhesion to a wide range of surfaces.  相似文献   

DEUTSCHE GESELLSCHAFT FÜR ERD- und GRUNDBAU e. V.: Empfehlungen des Arbeitskreises “Geotechnik der Deponien und Altlasten - GDA”. Berlin,Ernst & Sohn, 1990, 84 S., 10 Abb., 12 Tab., DM 58,-, ISBN 3-433-01189-3     

H.-J. Walther 《洁净——土壤、空气、水》1991,19(2):180-180

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H. H. HAHN und R. KLUTE (Eds.): Chemical Water and Wastewater Treatment. Berlin,Heidelberg, Springer-Verlag, 1990, 560 S., 335 Abb., 110 Tab., 178,- DM,ISBN: 3-540-53181-5     

H.-J. Walther 《洁净——土壤、空气、水》1991,19(6):702-702

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Autorenkollektiv: Biotechnologie – Herausforderung und Entwicklungschancen. Berlin,Akademie Verlag, 1988, 241 S., 38 Tab. u. Schemata,M 18,–, ISBN 3-05-000282-4     

H.-J. Walther 《洁净——土壤、空气、水》1989,17(4):486-486

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Zum Leistungsvermögen makroporöser Adsorberpolymere bei der Elimination organischer Mikroverunreinigungen     

H.-J. Walther  J. Kaeding  P. Fechner 《洁净——土壤、空气、水》1984,12(2):173-181

In laboratory experiments the adsorption of eleven different organic substances in water is individually tested in the range of concentration of 0.2… 5.0 mg/l on EP 60 and EP 61 (styrene-divinylbenzene, non-polar) and EP 62 and Y 59 (acrylic-acid-ester-divinylbenzene, polar). In batch experiments the elimination at 1… 2 g/l adsorber quantity was 35… 80%, strongly dissociated anionic substances as benzoic acid being adsorbed only to a low degree and weakly cationic and undissociated substances being adsorbed well. Within a homologous series adsorption increases with the molar mass until the pore diameter will become too small for the taking up of substances. Under dynamic conditions (filtration technology) an elimination of 90… 100% can be expected. As a whole, the adsorption on activated carbon was better in all cases than the adsorption on the polymers. The desorption for the regeneration of the polymers is the more difficult the better the substance contained is adsorbed. By repeated loading and regeneration only a slight influence on the adsorption and desorption of a substance was found.  相似文献   

Description and interpretation of the composition of fluid and alteration mineralogy in the geothermal system,at Svartsengi,Iceland     

Kristín Vala Ragnarsdóttir  John V Walther  Stefán Arnórsson 《Geochimica et cosmochimica acta》1984,48(7):1535-1553

The bulk composition and mineralogy of hydrothermally altered tholeiite, along with the composition and speciation of fluid, have been determined for a well-defined alteration zone at 240°C and 110 bars at Svartsengi, Iceland. Mass balances between the geothermal fluid and altered tholeiite, relative to a seawater/fresh water mixture and unaltered tholeiite, indicate the overall reaction per 1000 cm³ is: 1325 gm plagioclase + 1228 gm pyroxene + 215 gm oxide-minerals break down to form 685 gm chlorite + 636 gm albite + 441 gm quartz + 249 gm epidote + 266 gm calcite + 201 gm oxide-minerals + 15 gm pyrite, requiring an influx of 123 gm CO₂, 10 gm H₂S and 4 gm Na₂O and a release of 57 gm SiO₂, 35 gm FeO, 21 gm CaO, 8 gm MgO and 4 gm K₂O.Principal reactions, deduced from textural evidence, include Na-Ca exchange in plagioclase, precipitation of quartz, calcite and anhydrite, and formation of chlorite and epidote by reactions between groundmass minerals and fluid.Thermodynamic analyses of authigenic minerals and downhole fluid indicate that the fluid maintains a state close to equilibrium with the secondary mineral phases chlorite, epidote, albite, quartz, calcite, prehnite, anhydrite, pyrite and magnetite, whereas remnant primary labradorite and augite are out of equilibrium with the fluid.Water/rock ratios for the system are determined under a variety of assumptions. However, the open nature of the system makes comparisons with experimental and theoretical closed system studies ambiguous.  相似文献   

Lehr- und Handbuch der Abwassertechnik. 3. Aufl., Bd. IV: Biologisch-chemische und weitergehende Abwasserreinigung. Hrsgb. v. d. ABWASSERTECHNISCHEN VEREINIGUNG e. V. in St. Augustin,Berlin, Ernst & Sohn, 1985, 877 S., 458 Abb., 91 Tab., DM 278,–; ISBN 3-433-00905-8     

H.-J. Walther 《洁净——土壤、空气、水》1987,15(2):124-124

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Lehr- und Handbuch der Abwassertechnik. 3. Aufl., Bd. V: Organisch verschmutzte Abwässer der Lebensmittelindustrie. Hrsgb. v. d. ABWASSERTECHNISCHEN VEREINIGUNG e. V. in St. Augustin,Berlin, Ernst & Sohn, 1985, 660 S., 178 Abb., 229 Tab., DM 198,–, ISBN 3-433-00906-6     

H.-J. Walther 《洁净——土壤、空气、水》1987,15(2):148-148

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Festschrift zur Emeritierung von Professor Dr.-Ing., Dr. h. c. Botho Böhnke am 31. März 1987. Gewässerschutz – Wasser – Abwasser 95, Aachen 1987, 506 S., 124 Abb., 48 Tab., DM 45,–, ISSN 0342-2-6068     

H.-J. Walther 《洁净——土壤、空气、水》1987,15(6):687-687

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