2012
DOI: 10.1021/ie203040d
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Solidification of MSWI Ash at Low Temperature of 100 °C

Abstract: Municipal solid waste incineration (MSWI) bottom ash could be solidified with fly ash addition at 100 °C, and the flexural strength of solidified specimens reached almost 20 MPa. The strength development was found to be due mainly to C–S–H gel formation. Leaching tests were conducted to determine the amount of heavy metals dissolved from the solidified specimens, and the results showed that, under the hydrothermal conditions of this study, the leaching of heavy metals was very low. As such, it is possible to s… Show more

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Cited by 18 publications
(4 citation statements)
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“…A low-temperature (≤200 °C) hydrothermal method has been developed to synthesize mesoporous earthen materials , and other materials. , Previous work found that a mesoporous material from diatomaceous earth could be hydrothermally synthesized with slaked lime addition, , although the addition of too much slaked lime could destroy the original microstructure of material, that is, the porous structure of sepiolite . The hardening mechanism for the hydrothermal synthesis of earthen materials showed that tobermorite exerts the most important effects as a strength-producing constituent of the synthesized materials. , The molar ratio of CaO to SiO 2 (C/S) is regarded as the most important factor.…”
Section: Introductionmentioning
confidence: 99%
“…A low-temperature (≤200 °C) hydrothermal method has been developed to synthesize mesoporous earthen materials , and other materials. , Previous work found that a mesoporous material from diatomaceous earth could be hydrothermally synthesized with slaked lime addition, , although the addition of too much slaked lime could destroy the original microstructure of material, that is, the porous structure of sepiolite . The hardening mechanism for the hydrothermal synthesis of earthen materials showed that tobermorite exerts the most important effects as a strength-producing constituent of the synthesized materials. , The molar ratio of CaO to SiO 2 (C/S) is regarded as the most important factor.…”
Section: Introductionmentioning
confidence: 99%
“…A new low-temperature (≤200 °C) hydrothermal solidification/synthesis technology is developed to obtain a material with properties and performance between the sun-dried brick (room temperature) and ceramics (≥1000 °C), which might be suitable to manufacture tough materials that sustain the inherent porous property of the raw materials. This technology has been used to solidify clay minerals and wastes. …”
Section: Introductionmentioning
confidence: 99%
“…This behavior is in good consistency with the calculated Na/Al data (Table 1) and has also been reported elsewhere. 37 In general, Na + ions from the alkali activator (e.g., NaOH) can reduce the electrostatic repulsion between the dissolved anions through the formation of ion-pairing complexes (e.g., Si/Al−O − ‧‧‧ Na + ), by which to accelerate the geopolymer gel formation. 31 As mentioned above, 0.01 -0.05 wt.% of As V was added to the geopolymer mixtures in the form of sodium arsenate to evaluate the immobilization performance in this study.…”
Section: Effect Of Fa Asv and Gy Contents On Ucs As Shown Inmentioning
confidence: 99%