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  • 1
    Unbekannt
    Basel, Beijing, Wuhan : MDPI
    Schlagwort(e): water and wastewater management ; sediment pollution ; soil ; air quality ; LCA ; environmental assessment ; environmental materials
    Beschreibung / Inhaltsverzeichnis: Environmental quality is crucial to our health, our economy and our living. However, it faces several serious challenges, not least those of climate change, unsustainable consumption and production, as well as various forms of pollution. This Special Issue invites research papers aimed at a wide range of environmental issues: Water and wastewater management, water and sediment pollution control and remediation, soil degradation, conservation and remediation, waste management, landscape management, air quality and indoor environment, environmental impacts of buildings and materials, and LCA (Life-cycle assessment).
    Seiten: Online-Ressource (X, 150 Seiten) , Illustrationen, Diagramme
    Ausgabe: Printed Edition of the Special Issue Published in Environments
    ISBN: 9783038970026
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Journal of materials synthesis and processing 8 (2000), S. 265-270 
    ISSN: 1573-4870
    Schlagwort(e): Ultrafine milling ; milling environment ; mechanically induced surface oxidation ; wear ; contamination
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Changes in particle size, surface state, and composition brought about by planetary and vibration milling of silicon and quartz in various permittivity liquids were investigated. Using a variety of spectroscopic techniques (IRS, XPS, and Mössbauer spectroscopy) the changes in quality of the superficial layers of milled particles have been determined. During energy-intensive milling, the material being milled intensively interacts with the media and milling environment. The nature of the interaction and quality of the surface shell covering the milled particles depend on the reactivity and hardness of the interacting solids and of the milling environment. During planetary milling of silicon with tungsten carbide media, the superficial layers are formed by silicon suboxides and silicon oxide. The thickness of the superficial layer and the share of SiO2 increase with increasing permittivity of liquids. Milling with steel media results in a more complicated composition of the superficial layer. According to Mössbauer spectra, the iron is present in two main forms: as a magnetically ordered form identical with basic material of balls and in a paramagnetic form as a product of a mechanically stimulated surface reaction between Si and Fe. The presence of the superficial layers on the milled particles of silicon and quartz markedly influences the values of the specific surface area. This influence should be taken into consideration when calculating the specific contamination of the milled powder.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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