CIM   26986
CENTRO DE INVESTIGACIONES DEL MEDIO AMBIENTE
Unidad Ejecutora - UE
artículos
Título:
Pharmaceutical emerging pollutants removal from water using powdered activated carbon: study of kinetics and adsorption equilibrium
Autor/es:
NASLY DELGADO; DAMIAN MARINO; AGUSTÍN NAVARRO; ALBERTO CAPPARELLI,; NASLY DELGADO; DAMIAN MARINO; AGUSTÍN NAVARRO; ALBERTO CAPPARELLI,
Revista:
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Editorial:
ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2019 vol. 236 p. 301 - 308
ISSN:
0301-4797
Resumen:
Pharmaceutical products and their byproducts which are presentin wastewater and superficial water are becoming an environmentalproblem. A large effort has been made to introduce new and more efficienttreatment processes for removing these emerging pollutants. Among them,activated carbon is currently being studied to be implemented inwastewater treatment plants. In the present study the equilibrium andkinetics of the adsorption of carbamazepine (Cbz) and sildenafil citrate(Sil) onto powdered activated carbon are presented. Batch experimentswere performed to assess the potential of this kind of activated carbonfor removing these recalcitrant pharmaceuticals from aqueous systems. Inaddition, its adsorption efficiency was compared with the granularactivated carbon. The isotherms of Langmuir, Freundlich, LangmuirFreundlich and Redlich-Peterson were applied. Pseudo-first and pseudosecond order models, as well as a combined model and an intraparticlediffusion model were assayed on the results obtained.Linear and non-linear analyses were carried out to compare the best fitting isotherms and kinetics. The Langmuir isotherm was a good fit for the adsorption of Sil, whereas the Redlich-Peterson isotherm described the adsorption of Cbz. The experimental results for both pharmaceuticals follow a kinetic of pseudo first order. Comparative studies preparing the solutions with distilled water, dechlorinated water and wastewater were performed. No significant differences were observed in these studies.When initial concentrations similar to those found in surface waters for both pharmaceuticals were evaluated, removal efficiencies greater than 85% were obtained. Therefore, the use of this kind of activated carbon seems to be an efficient tool for the removal of recalcitrant emerging pollutants, such as Sil and Cbz.