Abstract
Fly ash is considered one of the major hazardous pollutants around the globe. Every year a million tonnes of fly ash is disposed of into the fly ash ponds which are major sites of pollution. The major fractions of fly ash are silicates, aluminates, and ferrous substances followed by minor traces element oxides. The aluminates and silicates comprise of 70% of the fly ash. The aluminates and silicates are present in fly ash in the form of crystalline mullites and sillimanites. Mullites being inert and crystalline are retractile to mineral acids. So, here the authors have reported a novel and simple step for the recovery of all the major elements of fly ash along with recovery of mullites by using hydrofluoric acid at room temperature. The method comprises of treatment of fly ash with diluted hydrofluoric acid for 12 hours under agitation. The recovered white color mullite powder, rod shaped of size 90-300 nm, was analyzed by the sophisticated instruments for the confirmation of the mullite particles.
Highlights
Mullite is an exceptionally advanced solid solution of aluminum silicate (3Al2O. 2SiO2), which is developed by the sintering of rare raw minerals that consists of alumino-silicate under extreme temperature and low pressure (Wang & Sacks, 2005)
In the present research work, we have reported the one step extraction of mullite from fly ash by using hydrofluoric acid at room temperature
Besides this the band at 464 cm-1 is attributed to the Fe-O band present in the magnetite and hematite in the fly ash
Summary
Mullite is an exceptionally advanced solid solution of aluminum silicate (3Al2O. 2SiO2), which is developed by the sintering of rare raw minerals that consists of alumino-silicate under extreme temperature and low pressure (Wang & Sacks, 2005). Mullite is an exceptionally advanced solid solution of aluminum silicate Mullites are crystalline compositions prominently, comprising of elements like Al, Si, and O They are non-stoichiometric compounds structurally similar to impure magnetite which belong to the compositional series of orthorhombic alumino-silicates with the general composition Al2(Al2+2xSi2‐2x) O10‐x (Li & Thomson, 1991)(Fischer, Gaede-Köhler, Birkenstock, & Schneider, 2012).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: International Journal of Applied Nanotechnology Research
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.