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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 220 - 228 (9page)
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In this study, the formation and physicochemical properties – such as the cation exchange capacity (CEC) and crystalline phases – of zeolite produced from coal fly ash (CFA) by the alkali hydrothermal reaction were investigated by performing XRD and SEM analyses. The hydrothermal reaction was carried out using alkali solutions with various KOH concentrations (M), liquid/solid ratio (L/S ratio; L/kg), and reaction times at a constant temperature (100°C). The results show that K-Chabazite (ca 40%) with CEC values of 220~240 meq/100 g was obtained at 3~4 M KOH concentration, 5~10 L/S ratio, and >48 h reaction time. The three steps in the alkali hydrothermal reaction for K-Chabazite formation – namely, the dissolution of Al and Si ions in CFA, condensation of the ions, and crystallization – were analyzed on the basis of the reaction time. The adsorption capacity (% removal) of the zeolite product for the removal of mixed heavy metals (Cu, Cd, Cr, and Pb; each at a concentration of 100 mg/L at pH 5.0) in a solution was also evaluated, and the efficacy of the zeolite product as an adsorbent was discussed.
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참고문헌 (20)
참고문헌 신청
C. A. Rios / 2009 / A comparative study if two methods for the synthesis of fly ash-based sodium and potassium type zeolite / Fuel 88 : 1403 ~ 1416
D. Mainganye / 2013 / Synthesis of zeolites Na-P1 from South African coal fly ash: Effect of impeller design and agitation / Materials 6 : 2074 ~ 2089
G. S. Simate / 2016 / Coal-based adsorbents for water and wastewater treatment / Journal of Environmental Chemical Engineering 4 : 2291 ~ 2312
J. Gordon / 2012 / Rapod and efficient crystallization of MIL-53(Fe) by ultrasound and microwace irradiation / Microporous Mesoporous Mater 162 : 3 ~ 43
J. P. Brassell / 2016 / Upscaling of zeolite synthesis from coal fly ash waste: Current status and future outlook / Zeolite-Useful Minerals : 3 ~ 23
D. Mainganye / 2013 / Synthesis of zeolites Na-P1 from South African coal fly ash: Effect of impeller design and agitation / Materials 6 : 2074 ~ 2089
G. S. Simate / 2016 / Coal-based adsorbents for water and wastewater treatment / Journal of Environmental Chemical Engineering 4 : 2291 ~ 2312
J. Gordon / 2012 / Rapod and efficient crystallization of MIL-53(Fe) by ultrasound and microwace irradiation / Microporous Mesoporous Mater 162 : 3 ~ 43
J. P. Brassell / 2016 / Upscaling of zeolite synthesis from coal fly ash waste: Current status and future outlook / Zeolite-Useful Minerals : 3 ~ 23
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