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Content Provider | World Health Organization (WHO)-Global Index Medicus |
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Author | Alewell, Christine Fritsche, Johannes Bruch, Ingo Sendelov, Michael Bänninger, Dominik Alewell, Ulrike Hasselbach, Ralf Hürlimann, Heinz |
Spatial Coverage | Germany |
Description | Country affiliation: Germany Author Affiliation: Bruch I ( Büro Bruch, 67822 Schmalfelderhof, Germany.) |
Abstract | In this study the physical and chemical properties of three different lava sands used in constructed wetlands for municipal wastewater treatment were investigated. The aim was to identify those properties and mechanisms that render lava sands as highly efficient filter media which could substitute conventional, fluviatile sands. It was shown that although lava sands per se may be suitable filter materials, the presence of zeolite minerals within the lava sands enhances the purification efficiency tremendously. Zeolites not only increase the sorption capacity, but even more important, they are able to absorb water in large amounts, which in turn leads to stronger swelling. The latter reduces hydrological conductivity considerably, resulting in a longer contact time to eliminate pollutants. A simple mineralogical survey of filter materials for the presence of zeolites may render many installations of constructed wetlands successful. |
ISSN | 09608524 |
Issue Number | 2 |
Volume Number | 102 |
e-ISSN | 18732976 |
Journal | Bioresource Technology |
Language | English |
Publisher | Elsevier |
Publisher Date | 2011-01-01 |
Publisher Place | Great Britain (UK) |
Access Restriction | Subscribed |
Subject Keyword | Filtration Instrumentation Silicon Dioxide Chemistry Water Purification Methods Biological Oxygen Demand Analysis Germany Phosphorus Analysis Water Wetlands Zeolites Journal Article Research Support, Non-u.s. Gov't Discipline Bioresource |
Content Type | Text |
Resource Type | Article |
Subject Domain (in MeSH) | Inorganic Chemicals Investigative Techniques Biological Phenomena Environment and Public Health Geographic Locations |
Subject | Bioengineering Renewable Energy, Sustainability and the Environment Waste Management and Disposal Environmental Engineering Medicine |
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