Mineralogy and technical properties of clayey diatomites from north and central Greece

Ilia, I; Stamatakis, M; Perraki, T

dc.contributor.author	Ilia, I	en
dc.contributor.author	Stamatakis, M	en
dc.contributor.author	Perraki, T	en
dc.date.accessioned	2014-03-01T01:31:06Z
dc.date.available	2014-03-01T01:31:06Z
dc.date.issued	2009	en
dc.identifier.issn	18961517	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19745
dc.subject	Absorption	en
dc.subject	Clays	en
dc.subject	Diatomite	en
dc.subject	FT-IR	en
dc.subject	Kaolinite	en
dc.subject	TG/DTG	en
dc.subject	Vermiculite	en
dc.subject	XRD	en
dc.title	Mineralogy and technical properties of clayey diatomites from north and central Greece	en
heal.type	journalArticle	en
heal.identifier.primary	10.2478/v10085-009-0034-3	en
heal.identifier.secondary	http://dx.doi.org/10.2478/v10085-009-0034-3	en
heal.publicationDate	2009	en
heal.abstract	Two bulk samples of clayey diatomite of Upper Miocene age originated from Western Macedonia, northern Greece and Thessaly central Greece were examined for their efficiency to be used as industrial absorbents. The samples were characterized using X-Ray Diffraction, Thermo-Gravimetric and Fourier Transform Spectroscopy, Scanning Electron Microscopy and ICP-MS analytical methods. The absorption capability of the clayey samples in oil and water were also examined. The mineralogy of both samples is predominated by the presence of clay minerals and amorphous silica. The clay minerals prevailed in the Klidi (KL) bulk sample, with muscovite being the dominant phase, and kaolinite and chlorite occurring in minor amounts. In the Drimos (DR) bulk sample, vermiculite was the predominant clay phase. Smectite was not found in either sample, whereas detrital quartz and feldspars were present in significant amounts. The amorphous silica phase (opal-A) occurs mainly with the form of disck-shaped diatom frustules. The chemistry of the samples is characterized by the predominance of silica, alumina, and iron, whereas all the other major and the trace elements are in low concentrations. Both clayey diatomite rocks exhibited sufficiently good oil and water absorption capacity, ranging between 70 to 79% in the clay-rich sample KL and 64 to 70% in the opal-A-rich sample DR. Comparing the properties of the rocks studied with other commercial absorbents, it is concluded that they may find applications as absorbents in industrial uses.	en
heal.journalName	Central European Journal of Geosciences	en
dc.identifier.doi	10.2478/v10085-009-0034-3	en
dc.identifier.volume	1	en
dc.identifier.issue	4	en
dc.identifier.spage	393	en
dc.identifier.epage	403	en