title: Tetracycline adsorption onto activated carbons produced by KOH activation of tyre pyrolysis char.
abstract: Tyre pyrolysis char (TPC), produced when manufacturing pyrolysis oil from waste tyre, was used as raw material to prepare activated carbons (ACs) by KOH activation. KOH to TPC weight ratios (W) between 0.5 and 6, and activation temperatures from 600 to 800 °C, were used. An increase in W resulted in a more efficient development of surface area, microporosity and mesoporosity. Thus, ACs derived from TPC (TPC-ACs) with specific surface areas up to 814 m(2) g(-1) were obtained. TPC, TPC-ACs and a commercial AC (CAC) were tested for removing Tetracycline (TC) in aqueous phase, and systematic adsorption studies, including equilibrium, kinetics and thermodynamic aspects, were performed. Kinetics was well described by the pseudo-first order model for TPC, and by a pseudo second-order kinetic model for ACs. TC adsorption equilibrium data were also fitted by different isotherm models: Langmuir, Freundlich, Sips, Dubinin-Radushkevich, Dubinin-Astokov, Temkin, Redlich-Peterson, Radke-Prausnitz and Toth. The thermodynamic study confirmed that TC adsorption onto TPC-ACs is a spontaneous process. TC adsorption data obtained in the present study were compared with those reported in the literature, and differences were explained in terms of textural properties and surface functionalities. TPC-ACs had similar performances to those of commercial ACs, and might significantly improve the economic balance of the production of pyrolysis oil from waste tyres.
authors: INTERFASE, Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27 # 9 Ciudadela Universitaria, Bucaramanga AA674, Colombia.
authors: R
authors: R
authors: Acosta
authors: Institut Jean Lamour, UMR CNRS-Université de Lorraine n 7198, ENSTIB, 27 rue Philippe Seguin, CS 60036, 88026 Epinal Cedex, France. Electronic address: Vanessa.Fierro@univ-lorraine.fr.
authors: V
authors: V
authors: Fierro
authors: Institut Jean Lamour, UMR CNRS-Université de Lorraine n 7198, ENSTIB, 27 rue Philippe Seguin, CS 60036, 88026 Epinal Cedex, France.
authors: A
authors: A
authors: Martinez de Yuso
authors: INTERFASE, Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27 # 9 Ciudadela Universitaria, Bucaramanga AA674, Colombia.
authors: D
authors: D
authors: Nabarlatz
authors: Institut Jean Lamour, UMR CNRS-Université de Lorraine n 7198, ENSTIB, 27 rue Philippe Seguin, CS 60036, 88026 Epinal Cedex, France.
authors: A
authors: A
authors: Celzard
mesh_terms: D000327:Adsorption; D002244:Carbon; D002606:Charcoal / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D007700:Kinetics; D017680:Potassium Compounds / Q000737:chemistry*; D013696:Temperature; D013752:Tetracycline / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D006878:Hydroxides; D017680:Potassium Compounds; D014874:Water Pollutants, Chemical; C009139:pyrolytic carbon; D002606:Charcoal; D002244:Carbon; D013752:Tetracycline; C029943:potassium hydroxide
keywords: Activated carbon; Adsorption modelling; Antibiotics removal; Tetracycline; Waste tyre recycling; Wastewater treatment