Regenerative Energie
Coal tar, as a by-product from coal gasifi cation in municipal or manufactured gas plants (MGP), has been used for numerous industrial purposes including wood impregnation and as a raw material for ointments. Initially valued for its antibiotic properties, the constituents of coal tar constituents, when released into the environment, now pose considerable threats to soil and groundwater quality in many industrialized countries.
Coal tar is a complex mixture; its aromatic and phenolic constituents are amongst the most worrisome substances from an environmental viewpoint. Understanding abiotic and enzymatically mediated pollutant transformation processes, involving complex contaminant, geochemical and microbial matrices, is required to control and, if desired, enhance biogeochemical reactions that contribute to site detoxification. In this context, one of the aspects less well understood is the role of poorly soluble electronacceptors, including Fe(III) and Mn(IV) minerals, in anaerobic contaminant transformation processes. Despite their poor aqueous solubility and thus poor bio-accessibility, these species participate in microbe-driven geochemical cycles. Several mechanisms, including electrochemically conductive pilus-like assemblages expressed by Geobacter species, or Shewanella’s chelatingagents, enable for extracellular electron transport to practically insoluble Fe(III) surfaces serving as terminal electron acceptors in contaminant oxidation, have been ‘devised’ by nature.
| Copyright: | © Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben |
| Quelle: | Depotech 2014 (November 2014) |
| Seiten: | 1 |
| Preis: | € 0,00 |
| Autor: | Kerstin Scherr Dr. Manfred Nahold |
| Artikel nach Login kostenfrei anzeigen | |
| Artikel weiterempfehlen | |
| Artikel nach Login kommentieren | |
Hochlauf der Wasserstoffwirtschaft
© Lexxion Verlagsgesellschaft mbH (8/2024)
Überblick über und Diskussion der Maßnahmen zum beschleunigten Ausbau
der Wasserstoffinfrastruktur in Deutschland
Die innerstaatliche Umsetzung des Pariser Klimaschutzübereinkommens
- ein Rechtsvergleich
© Lexxion Verlagsgesellschaft mbH (8/2024)
Like all public international law treaties, the Paris Climate Accords rely on national law for their implementation. The success of the agreement therefore depends, to a large extent, on the stepstaken or not taken by national governments and legislators as well as on the instruments and mechanisms chosen for this task. Against this background, the present article compares different approaches to the implementation of the Paris Agreement, using court decisions as a means to assess their (legal) effectiveness.
Klimaschutzrecht und Erzeugung erneuerbarer Energien in der Schweiz
© Lexxion Verlagsgesellschaft mbH (8/2024)
Verschachtelte Gesetzgebung unter politischer Ungewissheit