IODIDE REMOVAL BY RESORCINOL-FORMALDEHYDE CARBON AEROGELS
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Date
2022
Authors
Domán, Andrea
Battalgazy, Bekassyl
Dobos, Gábor
Kiss, Gábor
Tauanov, Zhandos
László, Krisztina
Zorpas, Antonis A.
Inglezakis, Vassilis J.
Journal Title
Journal ISSN
Volume Title
Publisher
Materials
Abstract
The adsorption technique is widely used in water purification, and its efficiency can be
significantly improved by target-specific adsorbent design. Research on iodine and its ion removal
from water has attracted a great deal of interest due to increased concentrations in the environment
and acute toxic effects, e.g., in human thyroid cells. In this work, the iodide removal performance of
two high-surface-area resorcinol–formaldehyde-based carbon aerogels was studied under acidic conditions.
The BET surface area was 790 m2/g (RF_ac) and 375 m2/g (RMF-GO), with a corresponding
micropore ratio of 36 and 26%, respectively. Both aerogels showed outstanding adsorption capacity,
exceeding the reported performance of other carbons and Ag-doped materials. Owing to its basic
nature, the RMF-GO carbon aerogel showed higher I capacity, up to 97 mg/g, than the acidic RF_ac,
which reached a capacity of 82 mg/g. The surface chemistry of the aerogels also played a distinct
role in the removal. In terms of kinetics, RF_ac removed 60% of the iodide ions and RMF-GO 30%
within 8 h. The removal kinetics was of the first order, with a half-life of 1.94 and 1.70 h, respectively.
Description
Keywords
Type of access: Open Access, carbon aerogels, resorcinol–formaldehyde, iodide, adsorption
Citation
Domán, A., Battalgazy, B., Dobos, G., Kiss, G., Tauanov, Z., László, K., Zorpas, A. A., & Inglezakis, V. J. (2022). Iodide Removal by Resorcinol-Formaldehyde Carbon Aerogels. Materials, 15(19), 6885. https://doi.org/10.3390/ma15196885