Evolution of zeolite crystals in geopolymer-supported zeolites: effects of composition of starting materials

Cited 2 time in webofscience Cited 0 time in scopus
  • Hit : 138
  • Download : 0
The role of the characteristics of raw materials and starting mix proportion on geopolymerization and evolution of zeolitic crystals from an amorphous geopolymeric gel was investigated. Different types and compositions of metakaolin, fly ash, and slag were activated using same waterglass and NaOH-based alkali activator. The test results showed that the reactivity of alkali-activated raw materials greatly depends on the Si/Al and Si/Na ratios of the starting mix, which affected the strength development and zeolite formation. It was further found that low-Ca class F fly ash was the most suitable to obtain zeolite Na-P1 crystals. Alternatively, high-Ca class C fly ash promoted the synthesis of hydroxysodalite and calcite. Higher porosity (52%) and surface area (99.5 m2/g) were achieved for the geopolymer-supported zeolites. These materials can be potentially used as membranes/filters for removal of hazardous contaminants (colloidal foulants, macromolecules, heavy metals/radionuclides) from water owing to their porous structure and affinity of zeolites towards cations.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2019-03
Language
English
Article Type
Article
Citation

MATERIALS LETTERS, v.239, pp.33 - 36

ISSN
0167-577X
DOI
10.1016/j.matlet.2018.12.044
URI
http://hdl.handle.net/10203/248970
Appears in Collection
CE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 2 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0