Hydrothermal processing of MSWI Fly Ash-towards new stable minerals and fixation of heavy metals

Bayuseno, A.P.; Schmahl, Wolfgang W.; Müllejans, Th.

doi:10.1016/j.jhazmat.2008.12.119

Cited by 76 publications

(69 citation statements)

References 31 publications

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“…The formation of hydroxysodalite zeolite, Al-substituted tobermorite and katoite have been shown to be consistent and in agreement with previous studies about alkaline hydrothermal treatment using waste materials with the similar chemical composition to that of FGD [20], [23].…”

Section: Figure8 Xrd Patterns Of the Products Of The Hydrothermal Trsupporting

confidence: 90%

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Alkaline Hydrothermal Treatment of the Waste Produced in the Semi-Dry Flue Gas Desulfurization System

2018

International Journal of Advanced Research in Chemical Science

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Section: Figure8 Xrd Patterns Of the Products Of The Hydrothermal Trsupporting

confidence: 90%

“…In general, the formation of hydrocalumite was favoured at lower temperature ranges between 80 and 90 ˚C, while the formation of Al-substituted tobermorite and katoite increases as the temperature increases [20].…”

Section: Figure8 Xrd Patterns Of the Products Of The Hydrothermal Trmentioning

confidence: 91%

Alkaline Hydrothermal Treatment of the Waste Produced in the Semi-Dry Flue Gas Desulfurization System

2018

International Journal of Advanced Research in Chemical Science

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“…because of high Na, K content (Jin et al, 2013). In contrast, the concentration of Ca in FA were quite higher at 38.24%, much more than that of fly ash from electrostatic precipitator (ESP) (Bayuseno et al, 2009) and even more than that of fly ash from the same bag filter in Japan (Yao et al, 1999) and China (Jin et al, 2013). Ca was found to be significantly enriched in fly ash, because excess Ca(OH) 2 is used to scrub acid flue gases (Bogush et al, 2015).…”

Section: Characteristics Of Fa and Silicon-aluminum Additivesmentioning

confidence: 99%

“…For the hydrothermal experiment, batches of 20 g of the pretreated samples were collected and then mixed with an alkali solution (0.5 mol/L NaOH) in a 300 mL Teflon vessel, of which the liquid/solid (L/S) ratio was adjusted to be 10 ml/g (Bayuseno et al, 2009). The mixture was further stirred with a magnetic stirrer at 500 rpm for 12 h. The hydrothermal experiment was conducted without stirring in a Teflon-line autoclave under an autogenous pressure at reaction temperature of 150°C (Bayuseno et al, 2009).…”

Section: Hydrothermal Processmentioning

confidence: 99%

“…The mixture was further stirred with a magnetic stirrer at 500 rpm for 12 h. The hydrothermal experiment was conducted without stirring in a Teflon-line autoclave under an autogenous pressure at reaction temperature of 150°C (Bayuseno et al, 2009). For further study on effect of seed-induced HT on formation of minerals, different reaction time was elected, including 3h, 6h, 9h, 12h, 24h and 48 h, respectively.…”

Section: Hydrothermal Processmentioning

confidence: 99%

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Seed-induced Hydrothermal Synthesis of Tobermorite from Municipal Solid Waste Incinerator Fly Ash

Shi¹,

Zhang²,

Li³

2017

JRST

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Resource recovery of municipal solid waste (MSW) incinerator fly ash is widely concerned. Tobermorite, an important but rare naturally mineral, could not be directly hydrothermal synthesized from it owing to its high content of Ca but low concentration of Si and Al. The selected external silicon-aluminum additives including coal fly ash (Cfa), bentonite, kaolin and diatomite were solely or combined added. With the addition of 30% mass composite additive in which the ratio of quality for Cfa and diatomite is 1:1, tobermorite could be synthesized most effectively in 48h at 150°C, mainly attributing to the proper element proportion adjusted by additives. Tobermorite seed added could not only promote the large formation of tobermorite, but also inhibit the production of hibschite and kaotoite. Since Ca/(Si + al) = 1.20 and al/(Si + al) = 0.20, addition of 30% mass of composite additive and 3% mass of tobermorite seed would be the recommended technological parameter.

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Synthesis of low‐costing 4A‐zeolite and stabilization of heavy metals from municipal solid waste incineration fly ash and activated red mud

Zhao

Liu

et al. 2022

Asia-Pacific J Chem Eng

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To handle the increasing environmental issues caused by red mud and municipal solid waste incineration (MSWI) fly ash, an integrated technology for its comprehensive utilization was developed through the activation of red mud followed by synthesis of 4A‐zeolite. Three influencing factors on the thermal‐alkali activation effect of red mud were investigated. Afterwards, activated red mud was combined with fly ash to synthesize 4A‐zeolite and solidify heavy metal simultaneously. The results indicated that the maximum extraction ratios of Si (57.77%) and Al (76.34%) from red mud were achieved at the NaOH/red mud mass ratio of 1.8, alkali fusion temperature of 800°C, and alkali fusion time of 120 min. Furthermore, the mixture of activated red mud and MSWI fly ash could be served as low‐costing raw materials to synthesize zeolite products with a compact structure. The solidification effect of typical heavy metals could meet GB 16889–2008 and HJ/300–2007 completely. Especially, the solidification efficiency for Cu, Zn, Pb, and Cd could reach 98.23%, 99.09%, 99.72%, and 98.21%, respectively. This paper not only solved the red mud accumulation and heavy metal pollution caused by fly ash under a relatively low‐temperature environment but also synthesized zeolite products containing huge economic benefits.

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Hydrothermal processing of MSWI Fly Ash-towards new stable minerals and fixation of heavy metals

Cited by 76 publications

References 31 publications

Alkaline Hydrothermal Treatment of the Waste Produced in the Semi-Dry Flue Gas Desulfurization System

Alkaline Hydrothermal Treatment of the Waste Produced in the Semi-Dry Flue Gas Desulfurization System

Seed-induced Hydrothermal Synthesis of Tobermorite from Municipal Solid Waste Incinerator Fly Ash

Synthesis of low‐costing 4A‐zeolite and stabilization of heavy metals from municipal solid waste incineration fly ash and activated red mud

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