The applications of inorganic and organic acids for the treatment of heavy polluted sewage sludge and the evaluation of the remaining metal with sequential chemical extraction

Zorpas, AA; Loizidou, M

dc.contributor.author	Zorpas, AA	en
dc.contributor.author	Loizidou, M	en
dc.date.accessioned	2014-03-01T01:32:02Z
dc.date.available	2014-03-01T01:32:02Z
dc.date.issued	2009	en
dc.identifier.issn	1944-3994	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20034
dc.subject	Acid extraction	en
dc.subject	Inorganic acid	en
dc.subject	Metals speciation	en
dc.subject	Organic acid	en
dc.subject	Sewage sludge	en
dc.subject	Sludge management	en
dc.subject.other	NATURAL ZEOLITE	en
dc.subject.other	TREATMENT-PLANT	en
dc.subject.other	REMOVAL	en
dc.subject.other	SPECIATION	en
dc.subject.other	FRACTIONATION	en
dc.subject.other	MUNICIPAL	en
dc.subject.other	SOILS	en
dc.subject.other	COMPOST	en
dc.subject.other	SAMPLES	en
dc.subject.other	FORMS	en
dc.title	The applications of inorganic and organic acids for the treatment of heavy polluted sewage sludge and the evaluation of the remaining metal with sequential chemical extraction	en
heal.type	journalArticle	en
heal.identifier.primary	10.5004/dwt.2009.936	en
heal.identifier.secondary	http://dx.doi.org/10.5004/dwt.2009.936	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Sludge is classified as difficult solid waste that requires special arrangements for disposal because of its noxious properties. The acid extraction method is characterized by fast removal of metals. Following this, this paper examined how the concentration and the contact time of the acids affect the removal of metals from the sludge. The sludge was further treated with HNO3, HCl and CH3COOH in different concentrations and different contact times. 5%, 10% 15%, 20% and 30% v/v of HNO3, HCl and CH3COOH for 10, 20 and 30 min of contact time were applied. The final result indicates that a sufficient metal amount, about 60%, is removed by the application of HNO3 (using 20% v/v HNO3), 50% is removed by the application of HCl (using 20 v/v HCl) and 30% is removed by the application of CH3COOH (using 20% v/v CH3COOH). Also, this paper presents the result of the sequential chemical extraction procedure (SCEP) which was applied in order to observe the partitioning of Cd, Cu, Cr, Fe, Ni, Pb and Zn. SCEP was applied as well in the treated samples in order to observe where the remaining metals load. The final results indicated that the remaining metal is further stabilized. © 2009 Desalination Publications.	en
heal.publisher	DESALINATION PUBL	en
heal.journalName	Desalination and Water Treatment	en
dc.identifier.doi	10.5004/dwt.2009.936	en
dc.identifier.isi	ISI:000273424700031	en
dc.identifier.volume	12	en
dc.identifier.issue	1-3	en
dc.identifier.spage	229	en
dc.identifier.epage	237	en