Capacidad de adsorción de plomo con intercambiadores catiónicos de carbón xantado

This study describes the adsorption of lead (Pb2+) in aqueous solutions of modified coal by treatment with CS2 and NaOH, using a ratio of 16,6:1 NaOH/coal (w/w) and 4,08 CS2/coal (w/w). Different tests such as acidity, kinetic and adsorption isotherms were carried out in order to assess the adsorption capacity of xanted and non-xanted coal. The sulfur groups presented in the xanted coal were identified by infrared spectroscopy(FTIR) and they were compared with non-xanted coal spectrum. The results show that the best lead removal in the solution (with a concentration of 100mg Pb2+/L and 50mg of adsorbent) was obtained at pH 5.0 for both coal (xanted and non-xanted) with an adsorption percentage of 98%. The kinetic studies indicate that the adsorption process can reach the equilibrium in about 120 minutes, following a pseudo-second order kinetics for both materials. The isotherms study indicates that the coal fits best to a Langmuir-type isotherm, however when the coal is xanted, it fits best to a Freundlich-type isotherm.

• Autores: Colpas Castillo, Fredy; Tarón Dunoyer, Arnulfo; Vasquez, Yelitza
• Tipo de recurso: Article of journal
• Fecha de publicación: 2017
• Institución: Universidad de Ciencias Aplicadas y Ambientales U.D.C.A
• Repositorio: Repositorio Institucional UDCA
• Idioma: spa
• OAI Identifier: oai:repository.udca.edu.co:11158/2255
• Acceso en línea: https://revistas.udca.edu.co/index.php/ruadc/article/view/399; https://doi.org/10.31910/rudca.v20.n2.2017.399
• Palabra clave: Carbón; Isoterma Langmuir; Xantatos; Efluentes industriales; Plomo; Carbón; Adsorción
• Rights: openAccess
• License: Derechos Reservados - Universidad de Ciencias Aplicadas y Ambientales