Functionalized adsorbents resulting from the transformation of fly ash: characterization, modification, and adsorption of pesticides

Andrunik, Magdalena; Skalny, Mateusz; Bajda, Tomasz

doi:10.1016/j.seppur.2023.123106

Cited by 17 publications

(1 citation statement)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to their properties, including a uniform porous structure that forms cavities, channels, and tunnels of nanometric size, thermal and hydrothermal stability, and easy ion exchange, zeolites have found numerous applications [ 16 , 17 ]. The application of zeolites as catalyst supports [ 18 ], in the adsorption processes of various pollutants, both organic [ 19 , 20 ] and inorganic [ 21 ], and soil amendment [ 22 ] are the most common pathways of their use. In the papers of Fedyna et al [ 18 , 23 ], the researchers investigated BEA–zeolite composite materials with AlSBA-15 to improve the share of multibranched or monobranched alkanes in the hydroisomerization of n-heptane or n-hexadecane, respectively.…”

Section: Introductionmentioning

confidence: 99%

Zeolite Composite Materials from Fly Ash: An Assessment of Physicochemical and Adsorption Properties

et al. 2023

Self Cite

View full text Add to dashboard Cite

Waste fly ash, with both low (with the addition of vermiculite) and high contents of unburned coal, were subjected to hydrothermal syntheses aiming to obtain zeolite composite materials—zeolite + vermiculite (NaX–Ver) and zeolite + unburned carbon (NaX–C). The composites were compared with parent zeolite obtained from waste fly ash with a low content of unburned carbon (NaX–FA). In this study, the physicochemical characteristics of the obtained materials were evaluated. The potential application of the investigated zeolites for the adsorption of ammonium ions from aqueous solutions was determined. Composite NaX–Ver and parent zeolite NaX–FA were characterized by comparable adsorption capacities toward ammonium ions of 38.46 and 40.00 mg (NH4+) g−1, respectively. The nearly 2-fold lower adsorption capacity of composite NaX–C (21.05 mg (NH4+) g−1) was probably a result of the lower availability of ion exchange sites within the material. Adsorbents were also regenerated using 1 M NaCl solution at a pH of 10 and subjected to 3 cycles of adsorption–desorption experiments, which proved only a small reduction in adsorption properties. This study follows the current trend of waste utilization (fly ash) and the removal of pollutants from aqueous solutions with respect to their reuse, which remains in line with the goals of the circular economy.

show abstract