Sorption Properties of Fly Ash Microspheres of Thermal Power Plants

Abstract

The sorption characteristics of aluminosilicate microspheres of fly ash from thermal power plants with respect to heavy metal ions were studied with a view to their subsequent use for integrated treatment of household and industrial wastewater. The mechanism and kinetics of the sorption of total iron ions from aqueous solutions are studied, quantitative characteristics of the sorption capacity and adsorption equilibrium constants are obtained. It has been established that aluminosilicate microspheres of fly ash possess sorption properties with respect to common iron ions. The sorption isotherm of iron ions from water by the material under study is characteristic of microporous sorbents. The quantitative characteristics of the sorption process allow us to conclude about the possibility of using aluminosilicate fly ash microspheres without any additional treatment for the purification of waste water from heavy metal ions.

Fly Ash as a Potential Adsorbent for Removing Radionuclides from Aqueous Solutions in an Adsorption-Membrane Assisted Process Compared to Batch Adsorption

“…Although fly ash is not evidently a material that may be used as a sorbent of the toxic heavy metals present in aqueous solutions, the bibliography of its use forms quite an extensive collection (see Scopus database, e.g., [ 6 , 7 , 8 , 9 , 10 , 11 ]). Zeolites and geopolymers, materials traditionally used as sorbents, are also often obtained from the FY.…”