@misc{10481/108515,
year = {2025},
month = {12},
url = {https://hdl.handle.net/10481/108515},
abstract = {This study presents a comparative analysis of the adsorption behavior of three industrial
ionic dyes—Indigo Carmine (IC), Congo Red (CR), and Evans Blue (EB)—using two adsorbent materials with distinct physicochemical and textural properties: bone char (BC)
and activated carbon cloth (ACC). The main objective was to evaluate and compare the
adsorption equilibrium and kinetics of these dyes on both materials. Equilibrium behavior
was analyzed using the Prausnitz–Radke isotherm model, while adsorption kinetics were
evaluated using PVSDM. The results showed that adsorption onto BC was primarily driven
by electrostatic interactions, enhanced by the presence of hydroxyapatite. The maximum
adsorbed amounts were determined to be 0.296, 0.107, and 0.0614 mmol g−1
for CR, IC,
and EB, respectively. In contrast, adsorption on ACC was influenced by both electrostatic
and hydrophobic forces due to its carbonaceous composition. IC exhibited significantly
higher adsorption on ACC (1.087 mmol g−1
), whereas CR and EB only 0.269 mmol g−1
and 0.028 mmol g−1
, respectively. Kinetic studies revealed that intraparticle transport was
the rate-limiting step across all systems. Specifically, pore volume diffusion controlled the
adsorption rate on ACC, with mean diffusion coefficients of 9.72 × 10−8
, 1.83 × 10−9
, and
1.48 × 10−10 cm2
s
−1
for IC, CR and EB, respectively. Conversely, for BC, adsorption surface
diffusion played a dominant role in the adsorption of IC and CR, with mean diffusion
coefficients of 1.62 × 10−9 and 7.28 × 10−10 for IC and CR, respectively. These findings
underscore the importance of considering both equilibrium and kinetic parameters in the
design of efficient wastewater treatment systems.},
organization = {MCIN/AEI/10.13039/501100011033 (PID2022-142169OBI00 project)},
organization = {Secretariat of University, Research and Innovation of the Andalusian Government (EMERGIA20 EMC21_00396)},
organization = {Secretariat of Science, Humanities, Technology,
and Innovation, SECIHTI, Mexico (scholarship 1034192)},
publisher = {MDPI},
keywords = {Bone char},
keywords = {Activated carbon cloth},
keywords = {Industrial dyes},
title = {A Comparative Study of the Adsorption of Industrial Anionic Dyes with Bone Char and Activated Carbon Cloth},
doi = {10.3390/w17233422},
author = {Aguirre-Contreras, Samuel and López Ramón, María Victoria and Velo Gala, Inmaculada and Álvarez Merino, Miguel Ángel and Aguilar-Aguilar, Angélica and Ocampo-Pérez, Raúl},
}