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AuthorAl-Ghouti M.A.
AuthorKhan M.
AuthorNasser M.S.
AuthorAl Saad K.
AuthorHeng O.E.
Available date2022-05-31T19:01:13Z
Publication Date2021
Publication NameJournal of Cleaner Production
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.jclepro.2020.125039
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85096530073&doi=http://dx.doi.org/10.1016%2fj.jclepro.2020.125039&partnerID=40&md5=d4ed281bdbbc343d7d3e94a19f479568
URIhttp://hdl.handle.net/10576/31767
AbstractThis paper investigated the development and evaluation of an extraction process for copper, chromium, cobalt, iron, manganese, zinc, lead, cadmium, barium, magnesium, and vanadium from municipal solid waste incineration ash (bottom and fly ashes) based on microwave-assisted acid extraction method. In this study, a novel conventional microwave-mediated technique was applied by using various acidic extracting agents, namely, hydrochloric acid, nitric acid, and phosphoric acid. Several experimental conditions and parameters were modified and optimized to determine the most effective conditions for maximizing metal extraction. The results were also compared with our preliminary research, which investigated the optimization of conventional heating for extracting the same metals. The current study concluded that the microwave-assisted acid extraction method was much more effective than conventional heating. The metals from the bottom ash were much easier to extract in contrast with the fly ash. For the bottom ash, 71 wt% of Co, 75.69 wt% of Cr, 56.19 wt% of Cd, 35.23 wt% of Ba, 30.2 wt% of Pb, and 5.41 wt% of Mn were effectively extracted using the protocol C (2 M HCl and 3 M H3PO4). 13.87 wt% of Al, http://dx.doi.org/10.59 wt% of Cu, 7.2 wt% of Fe, 5.25 wt% of Mg were also extracted using the protocols D and E (3 M HNO3 and 3 M H2O2) from MSW-BA. On the other hand, for the fly ash, 2.27 wt% of Cu, 0.93 wt% of Fe, 2.32 wt% of Zn, 6.28 wt% of Cd, 1.98 wt% of Ba, 3.46 wt% of Mg and 4.7 wt% of V were extracted by using the protocol A (5 M HCl and 5 M HNO3). 1.48 wt% of Cr, 0.93 wt% of Fe, 1.19 wt% of Mn, and 1.18 wt% of Al were extracted using the protocol C (2 M HCl and 3 M H3PO4). It was also confirmed that higher microwave power levels had a positive effect on the metal extraction, and longer contact times had an adverse effect. When comparing the cost analyses for both methods, it was found that the microwave-assisted acid extraction was less expensive than the conventional heating. The present study offers a promising method, which is simple and cost-effective and presents a minimal environmental risk to extract metals from municipal solid waste incineration ash.
Languageen
PublisherElsevier Ltd
SubjectBottom ash
Fly ash
Metal extraction
Microwave-assisted acid extraction method
Municipal solid waste
TitleA novel method for metals extraction from municipal solid waste using a microwave-assisted acid extraction
TypeArticle
Volume Number287
dc.accessType Abstract Only


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