ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Bentonites have been used for several purposes, due to their excellent physical, chemical,and structural properties. The main applications of bentonites in Brazil are, among others, asagglomerants for foundry molds, in iron ore pelletizing, as drilling mud in oil and water wells, aswine clarifiers, in catalysis, at the chemical and pharmaceutical industries, for pollutants removal inwater treatment plants, and in cosmetics. Since the 1980’s, bentonites have been used as barriers inlandfills, thanks to the attractive characteristics of the montmorillonite, the principal clay mineral inthe smectitic clays (popularly called bentonites). The inadequate accumulation of residues in soilsand waters is identified as one of the most serious current problems. Nowadays, geosynthetic clayliners, or GCL’s, have been used as a geo-synthetic hydraulic barrier. They are constituted by asodium or calcium bentonite layer encapsulated in geo-textiles or attached to geo-membranes,which are secured together by physical or chemical methods. This paper discusses GCL’s, theiruses, the influences of the type of clay, the working principles, the related aspects to landfillsprojects, and also the main Brazil’s bentonite exploitation areas
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.791.pdf
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