2026-06-01T04:37:40Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/311352026-02-03T10:59:23Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Gutierrez, Maria del Carmen author García-Mateos, Francisco José author Ruiz-Rosas, Ramiro Rafael author Rosas-Martínez, Juana María author Rodríguez-Mirasol, José author Cordero-Alcántara, Tomás author 2024-07-01 In this study, the removal of two emerging pollutants (EPs), antipyrine and acetanilide, through adsorption on activated carbons (ACs) prepared by chemical activation of Organosolv lignin with H3PO4 were evaluated. ACs with different pore size distribution were obtained at different impregnation ratios (H3PO4/lignin, 0.5–3.0 w/w) and activating temperatures (500–900 ◦C). The porosity and surface chemistry of the ACs were determined, and a bimodal size distribution of micropores and narrow mesopores was observed for the different ACs. These ACs were tested for antipyrine and acetanilide adsorption in aqueous solutions in a batch system at 20 ◦C and low concentration levels (0.5–10 ppm). In general, the ACs exhibited higher adsorption affinity to acetanilide than to antipyrine due to its smaller molecular size. Langmuir adsorption isotherm was able to describe the adsorption equilibrium data. A new Linear Driving Force (2-LDF) kinetic model, based on the bimodal size distribution of micropores and narrow mesopores observed for the ACs has been developed. The new model provided a more accurate description of the batch adsorption rates than that obtained from conventional kinetic models, and also enabled to relate the pore size distribution of the adsorbent with the adsorption kinetics. The validity of this model was checked in small-scale column fixed bed adsorption for the AC showing the highest affinity for both EP. The kinetic model and equilibrium adsorption isotherm obtained from the batch experiments were suc- cessfully used to provide an accurate description of the bed service time and the full breakthrough profile of acetanilide and antipyrine. María del Carmen Gutiérrez, Francisco José García-Mateos, Ramiro Ruiz-Rosas, Juana María Rosas, José Rodríguez-Mirasol, Tomás Cordero, Evaluation of acetanilide and antipyrine adsorption on lignin-derived activated carbons, Environmental Research, Volume 252, Part 2, 2024, 118918, ISSN 0013-9351, https://hdl.handle.net/10630/31135 10.1016/j.envres.2024.118918 Química Contaminantes Acetanilida - Absorción y adsorción Antipiréticos - Absorción y adsorción Carbón activado Lignina Evaluation of acetanilide and antipyrine adsorption on lignin-derived activated carbons.