Potential application of pre-treated municipal solid waste incineration fly ash as cement supplement

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dc.creatorYahaya, Yakubu
dc.creatorJun, Zhou
dc.creatorZhu, Shu
dc.creatorZhang, Yi
dc.creatorWang, Wenbin
dc.creatorMbululo, Yassin
dc.date2021-05-17T10:01:23Z
dc.date2021-05-17T10:01:23Z
dc.date2018
dc.date.accessioned2022-10-25T08:51:16Z
dc.date.available2022-10-25T08:51:16Z
dc.descriptionResearch Article
dc.descriptionPre-treatment process carried out on raw municipal solid waste incineration (MSWI) fly ash (FA) sample that did not comply initially with the USEPA method 1311 toxicity characteristic leaching procedure (TCLP) regulatory limits of 2011 reduced its chloride and heavy metal content appreciably, thereby making it compliant with the aforementioned regulatory requirement. More than 98% of each heavy metal was successfully removed. The process was excellent in removing cadmium (Cd) (99.99%) and very good at removing the rest. About 99.96% of Cu was eliminated, 99.96% of cobalt (Co), 99.95% of Zn, 98.61% of Cr, and 98.12% of nickel (Ni). Also, the leachate resulting from these pre-treatment steps met the China (GB 16889-2008) and USEPA method 1311 regulatory standards for safe discharge. The density and compressive strength of all the samples prepared increased as the FA content decreased. The compressive strength of all the samples passed the 1989 USEPA-recommended value of 0.34 MPa (50 psi), thereby making them suitable for industrial application. The sample that attained the highest compressive strength (2.08 MPa) after 28 days of curing incorporated 55% fly ash (FACS55), while the one with the least compressive strength (0.65 MPa) after the same period was made from only fly ash (FACS100). Moreover, the concentration of heavy metals in all the samples generally decreased with the FA content. Chromium was not detected in all the samples, thereby making this an excellent method for its immobilization. From the leachability test results, all the samples prepared met the USEPA method 1311 TCLP regulatory limits
dc.formatapplication/pdf
dc.identifierhttps://www.suaire.sua.ac.tz/handle/123456789/3532
dc.identifier.urihttp://hdl.handle.net/123456789/91183
dc.languageen
dc.publisherSpringer
dc.subjectMunicipal solidwaste incineration fly ash
dc.subjectSolidification/stabilization
dc.subjectLeachability
dc.subjectHeavymetal
dc.subjectHazardouswaste
dc.subjectPotential reuse
dc.subjectToxicity characteristic leaching procedure
dc.titlePotential application of pre-treated municipal solid waste incineration fly ash as cement supplement
dc.typeArticle

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