Suchergebnisse

Die Selbstreinigung der Flüsse -- Die Landberieselung -- Die intermittierende Bodenfiltration -- Das künstliche biologische Verfahren -- Mechanische und chemisch-mechanische Reinigung -- Getrennte Behandlung von Abwässern -- Verarbeitung der Abwässer auf verwertbare Stoffe -- Beseitigung des Schlammes.

Inhalts-Verzeichniss -- I. Allgemeine, bei der Verunreinigung eines Gewässers zu berücksichtigende Verhältnisse -- II. Gesetzliche Bestimmungen, betreffend die Reinhaltung der Flüsse -- III. Die verschiedenen Arten der Verunreinigung der Gewässer -- IV. Anforderungen an ein Wasser für verschiedene Nutzungszwecke -- Reinigung des Wassers -- Verfahren im Allgemeinen -- Reinigung des Trinkwassers -- Vorbemerkungen -- I. Reinigung des Trinkwassers im Grossen -- II. Reinigung des Trinkwassers im Kleinen durch Hausfilter -- III. Reinigung des Trinkwassers durch Kochen -- IV. Reinigung des Trinkwassers durch Chemikalien -- V. Reinigung des Trinkwassers durch Elektricität -- VI. Lüftung und Enteisenung von Trinkwasser -- VII. Das Weichmachen des Wassers -- Reinigung der Schmutzwässer -- A. Die Reinigung in den Gewässern selbst, die Selbstreinigung der Flüsse -- B. Reinigung der Schmutzwässer durch Berieselung -- C. Reinigung der Schmutzwässer durch Filtration -- D. Reinigung der Schmutzwässer auf biologischem Wege -- E. Reinigung der Schmutzwässer auf chemisch-mechanischem Wege -- F. Reinigung der Schmutzwässer durch Elektricität.

This article traces the personal and cultural voices expressed in the life-story interview of a former politically violent militant regarding her engagement with and disengagement from the armed struggle. Rather than looking at the macro and meso aspects related to politically motivated violence, we examine micro-narratives which express individual arguments, sociocultural discourses, and negotiations within and between them, These are voiced in the dynamics that take place within the self-system at times of key identity transitions (e.g., from being a committed militant to becoming a former militant). In this vein, we highlight how the embodied emotional chords of personal positions, the development of meta-positions, and the positioning and repositioning movements within the dialogical self, facilitate the emergence of new and more adaptive meanings in the personal meaning system of former militants. ; info:eu-repo/semantics/acceptedVersion

AbstractDespite recent achievements in reducing the contribution of road traffic to air pollution, agreed pollutant standards are exceeded frequently in large parts of Europe. Previous studies assessed the effectiveness of traffic interventions in improving local air quality. However, little research exists on the effect of closures of short road sections over longer periods. The multi-week maintenances on the Theodor Heuss Bridge, the main connection over the river Rhine between the German cities Mainz and Wiesbaden, offered the opportunity to investigate its effect on local air pollution. We measured ambient concentrations of major air pollutants and meteorological parameters at the Theodor Heuss Bridge before, during, and after its closure on 800 m in early 2020. We carried out time-series and closure-dependent evaluations of pollutant concentrations at the bridge accounting for wind direction. Furthermore, we performed regression analyses accounting for wind speed additionally. We compared the results with data from surrounding monitoring stations. We recorded higher concentrations at the Theodor Heuss Bridge compared to outside the closure, especially for particulate matter, nitric oxide, and black carbon. Only with wind from specific directions, we could detect reductions of concentrations during the closure for many pollutants as nitrogen dioxide (− 9.8%; 95% confidence interval: − 10.8– − 8.7%), but not for particulate matter. Since we found similar meteorology-dependent pollution reductions during the closure at both the bridge and the surrounding monitoring stations, we assume that regional meteorological factors overlaid a potential closure-related effect on local air quality. These factors must be accounted for in accountability studies on interventions focusing on short roads.