The effect of bentonite/cement mortar for the stabilization/solidification of sewage sludge containing heavy metals

Katsioti, M; Katsiotis, N; Rouni, G; Bakirtzis, D; Loizidou, M

dc.contributor.author	Katsioti, M	en
dc.contributor.author	Katsiotis, N	en
dc.contributor.author	Rouni, G	en
dc.contributor.author	Bakirtzis, D	en
dc.contributor.author	Loizidou, M	en
dc.date.accessioned	2014-03-01T01:29:19Z
dc.date.available	2014-03-01T01:29:19Z
dc.date.issued	2008	en
dc.identifier.issn	0958-9465	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19218
dc.subject	Bentonite	en
dc.subject	Cement	en
dc.subject	Heavy metals	en
dc.subject	Leaching tests	en
dc.subject	Stabilization/solidification	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.other	Bentonite	en
dc.subject.other	Cements	en
dc.subject.other	Compressive strength	en
dc.subject.other	Copper	en
dc.subject.other	Heavy metals	en
dc.subject.other	Leaching	en
dc.subject.other	Lead	en
dc.subject.other	Metals	en
dc.subject.other	Mortar	en
dc.subject.other	Plaster	en
dc.subject.other	Sewage	en
dc.subject.other	Sewage sludge	en
dc.subject.other	Strength of materials	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Zinc	en
dc.subject.other	Building Blocks	en
dc.subject.other	Characterization techniques	en
dc.subject.other	Electron scanning microscopies	en
dc.subject.other	High organic	en
dc.subject.other	Hydration reactions	en
dc.subject.other	Infrared analysis	en
dc.subject.other	Instrumental analysis	en
dc.subject.other	Landfill liners	en
dc.subject.other	Leachability	en
dc.subject.other	Leaching tests	en
dc.subject.other	S/S techniques	en
dc.subject.other	Slurry walls	en
dc.subject.other	Stabilization/solidification	en
dc.subject.other	Thermal analysis	en
dc.subject.other	Toxicity Characteristic Leaching procedures	en
dc.subject.other	Viable solutions	en
dc.subject.other	Metal analysis	en
dc.title	The effect of bentonite/cement mortar for the stabilization/solidification of sewage sludge containing heavy metals	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cemconcomp.2008.03.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cemconcomp.2008.03.001	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	This study examines stabilization/solidification (S/S) techniques using a bentonite/cement mortar. These techniques are usually applied for the stabilization of sewage sludge, containing heavy metals such as Cu, Zn, Pb. Due to the high organic content of sludge, bentonite had been added in order to stabilize the system. For this purpose, 4 x 4 x 16 cm mortar prism samples were prepared. Their composition was: 50% w/w sewage sludge (primary sewage sludge from Psyttalia Athens and secondary biological sewage sludge from Metamorphosis Athens), 30% w/w cement CEMI 42.5 and finally 20% w/w bentonite. The samples were cured for 28 days at 25 degrees C and compressive strength was tested. Highest strength and lowest leachability were the criteria for selection of the optimum product by the S/S technique. An extensive study using several characterization techniques focusing on hydration reactions was carried out. The instrumental analysis included: X-ray diffraction analysis, thermal analysis (TGA, DTA), electron scanning microscopy (SEM), infrared analysis (FT-IR) as well as tests for the toxicity characteristic leaching procedure (TCLP). The S/S products had been proven throughout the study as a viable solution for stabilizing heavy metals. They can be used in many applications such as in landfill liners, slurry walls and building blocks. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Cement and Concrete Composites	en
dc.identifier.doi	10.1016/j.cemconcomp.2008.03.001	en
dc.identifier.isi	ISI:000262010000019	en
dc.identifier.volume	30	en
dc.identifier.issue	10	en
dc.identifier.spage	1013	en
dc.identifier.epage	1019	en