RT Journal Article
T1 Acid insoluble lignin material production by chemical activation of olive endocarps for an efficient furfural adsorption-removal from aqueous solutions
A1 Cuevas, Manuel
A1 Moya, Alberto J.
A1 Hodaifa, Gassan
A1 Sánchez, Sebastián
A1 Mateo, Soledad
K1 Adsorption
K1 Chemical activation
K1 Bioadsorbent
K1 Olive endocarps
AB The present work describes a protocol of chemical activation, with acid catalyst, of olive endocarps to obtain acid insoluble lignin-rich materials with high capacities for the adsorption of furfural present in aqueous media. During biomass activation, factors such as acid concentration, reaction time and temperature, solid/liquid ratio and the presence of water extractives strongly affected both the surface characteristics of the treated bioadsorbents and their capacities for furfural retention (percentage increase close to 600% with respect to the crude biomass). Once a treated solid with good adsorbent properties was obtained, the optimal conditions for adsorption were found: stirring speed 80 rpm, temperature 303 K and adsorbent load 7.5 g solid/50 cm3. Kinetic study indicated the pseudo-second order model provided the best fit of the experimental data. At 303 K, the equilibrium adsorption capacities values ranged from 2.27 mg g−1 to 29.29 mg g−1, for initial furfural concentrations between 0.49 g dm−3 and 12.88 g dm−3. Freundlich model presented the best isotherm (R2 = 0.996 and SE = 4.7%) providing  and n values of 0.115 (mg g−1) (mg dm−3) and 0.610, respectively. Since physical interactions predominate in the adsorption of furfural on chemically activated olive endocarps, the furfural removal process could have occurred reversibly on the heterogeneous surface of the bioadsorbents.
PB Elsevier
YR 2024
FD 2024
LK https://hdl.handle.net/10433/20269
UL https://hdl.handle.net/10433/20269
LA en
NO Environmental Research Volume 248, 1 May 2024, 118243
NO Universidad Pablo de Olavide. Departamento de Biología Molecular e Ingeniería Bioquímica
DS RIO
RD May 24, 2026