Publication Type Journal Article
Title Steam Activation of Acid-Chars for Enhanced Textural Properties and Pharmaceuticals Removal
Authors Tetiana S. Hubetska Ana S. Mestre Natalia G. Kobylinska Ana P. Carvalho
Groups Chem4Env
Journal NANOMATERIALS
Year 2022
Month
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Volume 12
Number 19
Pages
Abstract The present work aims to explore steam activation of sisal or glucose-derived acid-chars as an alternative to KOH activation to prepare superactivated carbons, and to assess the adsorption performance of acid-chars and derived activated carbons for pharmaceuticals removal. Acid-chars were prepared from two biomass precursors (sisal and glucose) using various H2SO4 concentrations (13.5 M, 12 M, and 9 M) and further steam-activated at increasing burn-off degrees. Selected materials were tested for the removal of ibuprofen and iopamidol from aqueous solution (kinetic and equilibrium assays) in single-solute conditions. Activated carbons prepared from acid-char carbonized with 13.5 M and 12 M H2SO4 are mainly microporous solids composed of compact rough particles, yielding a maximum surface area and a total pore volume of 1987 m(2) g(-1) and 0.96 cm(3) g(-1), respectively. Solid state NMR reveals that steam activation increased the aromaticity degree and amount of C=O functionalities. Steam activation improved the acid-chars adsorption capacity for ibuprofen from 20-65 mg g(-1) to higher than 280 mg g(-1), leading to fast adsorption kinetics (15-20 min). The maximum adsorption capacities of selected activated samples for ibuprofen and iopamidol were 323 and 1111 mg g(-1), respectively.
DOI http://dx.doi.org/10.3390/nano12193480
ISBN
Publisher MDPI
Book Title
ISSN
EISSN 2079-4991
Conference Name
Bibtex ID WOS:000868010700001
Observations
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