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dc.creatorRadovanović, Dragana
dc.creatorKamberović, Željko
dc.creatorKorać, Marija
dc.creatorRogan, Jelena
dc.date.accessioned2021-03-10T13:11:52Z
dc.date.available2021-03-10T13:11:52Z
dc.date.issued2016
dc.identifier.issn1093-4529
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/3402
dc.description.abstractThe presented study investigates solidification/stabilization process of hazardous heavy metals/arsenic sludge, generated after the treatment of the wastewater from a primary copper smelter. Fly ash and fly ash with addition of hydrated lime and Portland composite cement were studied as potential binders. The effectiveness of the process was evaluated by unconfined compressive strength (UCS) testing, leaching tests (EN 12457-4 and TCLP) and acid neutralization capacity (ANC) test. It was found that introduction of cement into the systems increased the UCS, led to reduced leaching of Cu, Ni and Zn, but had a negative effect on the ANC. Gradual addition of lime resulted in decreased UCS, significant reduction of metals leaching and high ANC, due to the excess of lime that remained unreacted in pozzolanic reaction. Stabilization of more than 99% of heavy metals and 90% of arsenic has been achieved. All the samples had UCS above required value for safe disposal. In addition to standard leaching tests, solidificates were exposed to atmospheric conditions during one year in order to determine the actual leaching level of metals in real environment. It can be concluded that the EN 12457-4 test is more similar to the real environmental conditions, while the TCLP test highly exaggerates the leaching of metals. The paper also presents results of differential acid neutralization (d-AN) analysis compared with mineralogical study done by scanning electron microscopy and X-ray diffraction analysis. The d-AN coupled with Eh-pH (Pourbaix) diagrams were proven to be a new effective method for analysis of amorphous solidified structure.en
dc.publisherTaylor & Francis Inc, Philadelphia
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/34033/RS//
dc.rightsrestrictedAccess
dc.sourceJournal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engine
dc.subjectSolidification/stabilizationen
dc.subjectleaching testsen
dc.subjectheavy metalsen
dc.subjectarsenicen
dc.subjectacid neutralization capacityen
dc.subjectdifferential acid neutralization analysisen
dc.subjectEh-pH diagramsen
dc.titleSolidified structure and leaching properties of metallurgical wastewater treatment sludge after solidification/stabilization processen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage43
dc.citation.issue1
dc.citation.other51(1): 34-43
dc.citation.rankM23
dc.citation.spage34
dc.citation.volume51
dc.identifier.doi10.1080/10934529.2015.1079104
dc.identifier.pmid26457922
dc.identifier.scopus2-s2.0-84947613158
dc.identifier.wos000365284700004
dc.type.versionpublishedVersion


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