Co-disposal of MSWI fly ash and spent caustic through alkaline-activation consolidation - Details

author：

Tian, Xiang (Tian, Xiang.) ^[1] | Rao, Feng (Rao, Feng.) ^[2] | León-Patiño, Carlos Alberto (León-Patiño, Carlos Alberto.) ^[3] | Song, Shaoxian (Song, Shaoxian.) ^[4]

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Abstract：

This　work　investigates　spent　caustic　as　an　alkaline　activator　for　the　consolidation　of　municipal　solid　waste　incineration　(MSWI)　fly　ash　through　the　alkaline　activation　process.　The　effects　of　comparable　alkalinity　of　NaOH　solution　and　spent　caustic,　and　the　addition　of　blast　furnace　slag　(BFS)　on　consolidation　MSWI　fly　ash　were　investigated.　Compressive　strength　measurement　for　alkali-activated　MSWI　fly　ash-based　mortars　was　characterized　to　evaluate　the　consolidation　effect.　The　microstructure　of　mortars　was　characterized　by　XRD,　FTIR,　29Si　NMR,　and　SEM　measurement.　It　was　found　that　the　compressive　strength　of　spent　caustic-activated　mortars　was　higher　than　that　of　NaOH-activated　mortars.　The　formation　of　ettringite　and　more　C-(A)-S-H,　and　the　presence　of　carbonate　and　organics　in　spent　caustic-activated　mortars　enhanced　the　compressive　strength.　This　work　found　an　emerging　cost-efficient　alkaline　activator　in　waste　management　through　alkaline　activation　and　could　achieve　environmentally　sustainable.　©　2020　Elsevier　Ltd

Keyword：

Blast furnaces Chemical activation Compressive strength Fly ash Mortar Municipal solid waste Slags Sodium hydroxide Waste incineration Waste management

Community：

[ 1 ] [Tian, Xiang]School of Zijin Mining, Fuzhou University, Fuzhou; Fujian; 350108, China
[ 2 ] [Tian, Xiang]CONACYT Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia; Mich.; 58030, Mexico
[ 3 ] [Tian, Xiang]School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan; Hubei; 430070, China
[ 4 ] [Rao, Feng]School of Zijin Mining, Fuzhou University, Fuzhou; Fujian; 350108, China
[ 5 ] [Rao, Feng]CONACYT Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia; Mich.; 58030, Mexico
[ 6 ] [León-Patiño, Carlos Alberto]CONACYT Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia; Mich.; 58030, Mexico
[ 7 ] [Song, Shaoxian]School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan; Hubei; 430070, China

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Source ：

Cement and Concrete Composites

ISSN： 0958-9465

Year： 2021

Volume： 116

9 . 9 3

JCR@2021

1 0 . 8 0 0

JCR@2023

ESI HC Threshold：142

JCR Journal Grade：1

CAS Journal Grade：1

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 35

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 1

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