Аннотации:
Removal of mercury (II) from aqueous phase is of utmost importance, as it is highly toxic
and hazardous to the environment and human health. A promising method for the removal of
mercury (II) ions from aqueous solutions is by using adsorbents derived from coal fly ash (CFA),
such as synthetic zeolites. In this work we present the hydrothermal production of synthetic
zeolites from CFA followed by a modification for impregnation of silver nanoparticles, in solid
concentrations from 0.15 to 4.71 wt.%. All produced zeolites and parent materials are characterized
by XRD, XRF, BET and PSA to obtain morphological and microstructural data. Moreover, mercury
(II) ions removal from aqueous solutions with initial concentration of 10 ppm is studied. According
to results, zeolites and Ag-nanocomposites demonstrate much higher removal than parent CFA
(up to 98%). In addition to this, we could observe a distinct adsorption behavior depending on the
loading of Ag NPs in nanocomposites. A possible removal mechanism for both zeolites and
Ag-nanocomposites is discussed.