| dc.description.abstract | This study analyzes the use of fly ash, from an electrical power plant, to be used as adsorbent
material in an aqueous solutions o chromium and copper ions, to use in treatment of waste water from
mining operations. The fly ash analyses of FRX and DRX, mainly showed Si, Al, Fe and O.
The above components are primarily responsible for the surface patterns, with a pH of 10.66 for the full
sample and 3.7 point of zero charge. Therefore, adsorption of Cr (VI) as HCrO4-(anionic) is favored at pH2
with a removal of 67.98%. This removal increases as the concentration of the metal is reduced, reaching a
79.30% at 10 [mg /L] chromium. In the case of copper (cationic character), an adsorption of 100% is
obtained at pH 4, independent of the contact time, 1 hour of exposure peaks removal. It is concluded that
the fly ash of coal, currently, considered a waste material. It can be used as unconventional adsorbent
material of metal ions under acid pH 4, attributed mainly to the presence of SiO2, Al2O3 and Fe2O3. | |
