RT Journal Article
T1 Evaluation of the adsorptive and catalytic properties of sludge-based carbon materials for the efficient removal of antibiotics listed in the European Decision 2020/1161/EU
A1 Álvarez Torrellas, Silvia
A1 Segura, Yolanda
A1 de Mora, A.
A1 Gutiérrez Sánchez, Pablo
A1 Sanz Santos, Eva
A1 Corrochano, Noelia
A1 Larriba Martínez, Marcos
A1 Pariente, M. I.
A1 Martínez, Fernando
A1 García, Juan José
AB In this work, sludge from an oily refinery and urban wastewater treatment plant have been used for the synthesis of activated carbons using ZnCl2 and KOH as activating agents. The materials were used as adsorbents and catalysts for the removal of three antibiotics, e.g., sulfamethoxazole (SMX), trimethoprim (TMP) and ciprofloxacin (CPX). The activated carbons have been fully characterized. Thus, the BET surface area of the materials ranged from 183 to 784 m2/g. Qe values of 127.3 mg/g for SMX onto U-ZnCl2; 168.5, and 179.6 mg/g for TMP and CPX, respectively, onto R-KOH were obtained. The best fitting of kinetic data was found by using pseudo-second order (PSO) model, while Freundlich and Liu models successfully fitted the equilibrium adsorption isotherms. SMX, TMP and CPX adsorption mechanisms were governed by pore filling, π-π interactions and H-bonds. R-KOH material was used for wastewater treatment, finding that the adsorption capacity decreased due to a competitive effect. Regarding the Fenton process, the U-ZnCl2 carbon achieved the total SMX degradation after 60 min. In contrast, TMP and CPX showed the highest depletion in only 20 min. The higher performances of the U-ZnCl2 material may be due to a higher C/O ratio and high N and Zn contents. In the experiments with a real aqueous matrix, similar conversions were achieved, although the kinetic constants resulted in slightly lower values. So, it could be stated that adsorption and Fenton oxidation performance were influenced by the different properties of the carbon materials.
PB Elsevier
SN 2213-3437
YR 2023
FD 2023-10
LK https://hdl.handle.net/20.500.14352/105112
UL https://hdl.handle.net/20.500.14352/105112
LA eng
NO S. Álvarez-Torrellas, Y. Segura, A. de Mora, P. Gutiérrez-Sánchez, E. Sanz-Santos, N. Corrochano, M. Larriba, M.I. Pariente, F. Martínez, J. García, Evaluation of the adsorptive and catalytic properties of sludge-based carbon materials for the efficient removal of antibiotics listed in the European Decision 2020/1161/EU, Journal of Environmental Chemical Engineering, Volume 11, Issue 5, 2023, 110743, ISSN 2213-3437,
DS Docta Complutense
RD 23 jul 2024