Abstract
Tobermorite was synthesized successfully from waste incineration fly ash by hydrothermal treatment in the presence of sodium hydroxide solution. The tobermorite synthesis was examined as a function of reaction temperature, time, and NaOH concentration. The formation of tobermorite was identified in all of the fly ash treated with NaOH at 180 °C, followed by the minor generations of sodalite and cancrinite phases with increasing NaOH concentration and extending reaction time. The NaOH-treated fly ash revealed the uptake behaviors for Cs+ and NH4 +, whereas the fly ash untreated with NaOH solution did not show that. The uptake amounts of resulting products were also determined: 0.40 mmol/g for Cs+ and 0.35 mmol/g for NH4 + in the fly ash treated with 2.0 M NaOH at 180 °C for 20 h.
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Yao, Z., Tamura, C., Matsuda, M. et al. Resource recovery of waste incineration fly ash: Synthesis of tobermorite as ion exchanger. Journal of Materials Research 14, 4437–4442 (1999). https://doi.org/10.1557/JMR.1999.0601
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DOI: https://doi.org/10.1557/JMR.1999.0601