Details zur Publikation

Kategorie Textpublikation
Referenztyp Berichtartikel
URL http://www.geotechnologien.de/portal/cms/Geotechnologien/Ressourcen/Docs/Science+Report/SR16_2?binary=true&status=300&language=de
Titel (primär) MicroActiv - Optimization of water purification technology for arsenic and antimony scavenging by microbially-activated Fe-oxide minerals
Titel (sekundär) Mineral surfaces - from atomic processes to industrial application : status seminar, 26-27 October 2010, Johannes-Gutenberg-Universität, Mainz ; programme & abstracts
Autor Kersten, M.; Bahr, C.; Daus, B.; Driehaus, W.; Kappler, A.; Karabacheva, S.; Kolbe, F.; Posth, N.; Reich, T.Y.; Schurk, K.; Stanjek, H.; Wennrich, R.
Herausgeber Munch, U.; Dransch, W.
Journal / Serie Geotechnologien Science Report
Erscheinungsjahr 2010
Department ANA; GWS
Band/Volume 16
Seite von 170
Seite bis 181
Sprache englisch
Abstract The main research activity of this collaborative research effort is the optimization of water treatment technology on basis of granulated Fe hydroxides (= GFH, or in German GEH). GEHR is applied by the SME-Partner, the GEH Wasserchemie GmbH & Co. KG established in 1997 and now one of the leading providers of ironbased high-capacity adsorbents for use in fixed bed filter process. Over 2000 plants have yet been delivered into more than 20 countries worldwide. Main purpose is treatment of Asand Sb-tainted waters, providing e.g. in India more than half million people with treated tap water. GEH. is based on pure synthetic iron hydroxide (b-FeOOH, akaganeite) with a large effective surface area (>250 m2/g) and an adsorption capacity of up to 50 g/kg As if applied on waters containing only As. This enables a simple, low maintenance removal procedure with capacities of up to 300,000 bed volumes over years without producing hazardous Asloaded sludge to be costly deposited. The main practical problem is the yet less well understood efficiency degradation with different groundwater milieus; with more or less reduced bed volume capacity. Our experiments revealed that these effects are mainly due to competing inorganic oxyanion species (e.g., silicate). An open question to be solved for the SME partner was whether a specific biogenic functionalization of the surface may help in optimizing towards a more versatile and smooth filter technology, but our preliminary experiment results were not thus promising towards this task. Instead, we found a severe inhomogeneity in adsorption efficiency and competing effects by inorganic oxyanion species on an individualgrain scale which may become unexpected and new key information how to improve on the GEH production process.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=10152
Kersten, M., Bahr, C., Daus, B., Driehaus, W., Kappler, A., Karabacheva, S., Kolbe, F., Posth, N., Reich, T.Y., Schurk, K., Stanjek, H., Wennrich, R. (2010):
MicroActiv - Optimization of water purification technology for arsenic and antimony scavenging by microbially-activated Fe-oxide minerals
In: Munch, U., Dransch, W. (eds.)
Mineral surfaces - from atomic processes to industrial application : status seminar, 26-27 October 2010, Johannes-Gutenberg-Universität, Mainz ; programme & abstracts
Geotechnologien Science Report 16
Koordinierungsbüro Geotechnologien, Potsdam, p. 170 - 181