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Improving the treatment efficiency of constructed wetlands with zeolite-containing filter sands
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 694005
Author(s) Bruch, Ingo; Fritsche, Johannes; Bänninger, Dominik; Alewell, Ulrike; Sendelov, Michael; Hürlimann, Heinz; Hasselbach, Ralf; Alewell, Christine
Author(s) at UniBasel Alewell, Christine
Fritsche, Johannes
Year 2011
Title Improving the treatment efficiency of constructed wetlands with zeolite-containing filter sands
Journal Bioresource technology
Volume 102
Number 2
Pages / Article-Number 937-41
Keywords Constructed wetlands, Wastewater purification, Zeolite, Lava sand
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. (C) 2010 Elsevier Ltd. All rights reserved.
Publisher Elsevier
ISSN/ISBN 0960-8524
edoc-URL http://edoc.unibas.ch/dok/A5843784
Full Text on edoc No
Digital Object Identifier DOI 10.1016/j.biortech.2010.09.041
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/20933388
ISI-Number WOS:000286782700071
Document type (ISI) Journal Article
 
   

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