RT Journal Article
T1 Adsorption of anionic wood dyes on KOH-activated carbons from Pinus radiata sawdust
A1 Pimentel, Catarina Helena da Silveira Miranda Guedes
A1 Castro Agra, Rubén
A1 Freire Leira, María Sonia
A1 Gómez Díaz, Diego
A1 González Álvarez, Julia
K1 Pine sawdust
K1 Activated carbons 
K1 Chemical activation 
K1 Wood dyes 
K1 Adsorption
K1 Desorption
AB Chemically activated carbons synthesized from pine sawdust were applied efficiently for the elimination of wood dyes from aqueous solutions. Different proportions (1:2 and 1:4) of activating agent (KOH) and activation temperatures (600 and 850 °C) were used. Carbon surface morphology was characterized. The effect of pH (2–12), initial adsorbate concentration (5–500 mg L−1), and carbon dosage (0.1–0.5 g L−1) on dye adsorption were studied in batch mode. Langmuir model described well the adsorption equilibrium. The maximum found adsorption capacities were 1221.58, 1673.03, and 240.38 mg g−1 for blue and red at 500 mg L−1 and black at 100 mg L−1, respectively, using activated carbon at 850 °C and 1:4 (ACPS-4–850); at 25 °C, adsorbent dose 0.4 g L−1 for blue and black and 0.3 g L−1 for red dye and without change the pH for blue and red and at pH = 2 for black dye. The pseudo-second-order model explained the kinetics of adsorption except for the black dye at 100 mg L−1 using ACPS-4–850 for which it was the pseudo-first-order model. Desorption studies performed with ACPS-4–850 revealed that the adsorption was irreversible by chemical regeneration, whereas for the black dye, regeneration was efficient using H2O2 as desorbing agent
PB Springer
SN 2190-6815
YR 2024
FD 2024
LK http://hdl.handle.net/10347/34737
UL http://hdl.handle.net/10347/34737
LA eng
NO Pimentel, C.H., Castro-Agra, R., Freire, M.S. et al. Adsorption of anionic wood dyes on KOH-activated carbons from Pinus radiata sawdust. Biomass Conv. Bioref. (2024). https://doi.org/10.1007/s13399-024-05587-1
NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work was supported by the Ministerio de Ciencia, Innovación y Universidades, grant number PGC2018-101047-B-I00
DS Minerva
RD 23 abr 2026