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Using the Response Surface Methodology to Optimize the Extraction of Silica and Alumina from Coal Fly Ash for the Synthesis of Zeolite Na-A

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dc.citedby18
dc.contributor.authorMatlob A.S.en_US
dc.contributor.authorKamarudin R.A.en_US
dc.contributor.authorJubri Z.en_US
dc.contributor.authorRamli Z.en_US
dc.contributor.authorid35753601600en_US
dc.contributor.authorid23067175400en_US
dc.contributor.authorid35778292400en_US
dc.contributor.authorid8626374500en_US
dc.date.accessioned2023-12-29T07:47:37Z
dc.date.available2023-12-29T07:47:37Z
dc.date.issued2012
dc.description.abstractResponse surface methodology and inductively coupled plasma-optical emission spectroscopy were used to analyze the silicon (Si) and aluminum (Al) ion concentrations extracted from microwave-assisted hydrothermal fusion reactions between coal fly ash (CFA) and sodium hydroxide solution. The extracts containing Si and Al ions were successfully converted to zeolites by hydrothermal treatment at 95�C for 72 h. Fifteen experimental conditions for the extraction process were obtained using Box-Behnken design through the manipulation of three independent variables. These variables include NaOH concentration (2, 4 and 6 M), power level of microwave irradiation (10, 50 and 100 W)+++ and exposure time (1, 3.5 and 6 min). The statistical analysis result indicated a significant interaction effect with a p value of 0.001. Increasing the values of all the three variables led to an increase in the concentration of Si and Al ions in the CFA extract. The optimized combinations of the three variables within the experimental range for Si and Al extraction were 5.6 M for NaOH concentration, 5.5 min time of exposure to microwave irradiation and 100 W of microwave power level. Based on the extracted concentration values of Si and Al, three products were isolated; zeolite Na-A, sodalite octahydrate and gibbsite which were characterized by their XRD images. Plots of percent yield of the final products versus [Si 4+] and [Al 3+] revealed a trend of the types of product for various ranges of concentrations of the ions in the extracts prior to hydrothermal treatment at 95�C. � 2011 King Fahd University of Petroleum and Minerals.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1007/s13369-011-0149-2
dc.identifier.epage40
dc.identifier.issue1
dc.identifier.scopus2-s2.0-84855702758
dc.identifier.spage27
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84855702758&doi=10.1007%2fs13369-011-0149-2&partnerID=40&md5=42ef89e6d6ad7e533c7e73516cdde6aa
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/30418
dc.identifier.volume37
dc.pagecount13
dc.sourceScopus
dc.sourcetitleArabian Journal for Science and Engineering
dc.subjectAlumina
dc.subjectFly ash
dc.subjectMicrowave
dc.subjectResponse Surface Methodology
dc.subjectSilica
dc.titleUsing the Response Surface Methodology to Optimize the Extraction of Silica and Alumina from Coal Fly Ash for the Synthesis of Zeolite Na-Aen_US
dc.typeArticleen_US
dspace.entity.typePublication
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