Potential industrial utilization of pre-treated municipal solid waste incineration fly ash

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dc.contributor.authorYakubu, Yahaya
dc.contributor.authorZhou, Jun
dc.contributor.authorShu, Zhu
dc.contributor.authorTan, Yigen
dc.contributor.authorZhao, Zhengliang
dc.contributor.authorMbululo, Yassin
dc.date.accessioned2021-05-19T17:50:48Z
dc.date.available2021-05-19T17:50:48Z
dc.date.issued2018
dc.descriptionJournal Articleen_US
dc.description.abstractThis study sought to establish the effectiveness of water washing pre-treatment on the quality of municipal solid waste incineration (MSWI) fly ash (FA) for reuse and solidification or stabilization (S/S). Initial analysis of the FA sample shows that it did not meet the USEPA-1311 toxicity characteristic leaching procedure (TCLP) regulatory limits of 2011. As a result, a two-stage water washing process was carried out an attempt to improve the quality of the MSWI FA. After the washing pre-treatment, the heavy metals in the FA sample met the regulatory limits, thereby making it non-toxic for reuse or safe disposal. The leachate from the washing process also passed regulatory standards of China (GB 8978 – 1996) and the 2011 USEPA-1311. The washing process successfully removed more than 98% of each heavy metal under study. The process was excellent at removing cadmium (99.99%) and very good at removing the rest of the heavy metals. The 28-day compressive strength increased as the quantity of FA decreased. Also, all the heavy metals in the samples prepared with the pre-treated FA met the USEPA-1311 TCLP regulatory limit for reuse and safe disposal. The heavy metals leachability and compressive strength tests showed that the effect of cement-based S/S was largely influenced by its quantity in the samples. The highest compressive strength was attained by using 55% of the FA as replacement for cement. However, FA replacements of up 70% also yielded good results that met the 1989 USEPA standard of 0.34 MPa (50 psi)en_US
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/123456789/3540
dc.language.isoenen_US
dc.subjectFly ashen_US
dc.subjecthazardous wasteen_US
dc.subjectheavy metalen_US
dc.subjectmunicipal solid wasteen_US
dc.subjectreuseen_US
dc.subjectsolidification/stabilizationen_US
dc.titlePotential industrial utilization of pre-treated municipal solid waste incineration fly ashen_US
dc.typeArticleen_US

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