Cation xanthated exchangers from colombian sub-bituminous coals effectively removed cadmium and lead from aqueous solutions

Gómez de Arco, Lewis y Alzate Rodríguez, Liliana y Colpas Castillo, Fredy y Fernández Maestre, Roberto (2011) Cation xanthated exchangers from colombian sub-bituminous coals effectively removed cadmium and lead from aqueous solutions. Química Hoy, 2 (1). pp. 23-25. ISSN 2007-1183

[img]
Vista previa
Texto
Art7.pdf - Versión Publicada
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (5MB) | Vista previa

Resumen

In Colombia, low rank coals are almost totally used for power and matallurgical aims, which are activities that produce contamination. In this investigation, as an alternative to the traditional use of low rank coals, we prepared cationic xanthated exchangers from a subbituminous coal (67.6%C, 4.6%H, 22.4%O, 0.6%S, 3.2% ashes and 46.2% volatile matter) of Montelíbano-Córdoba; this exchanger showed better exchange capacities for cadmium and lead (1.8 meq/g) than traditional sulphonated exchangers (0.56 and 1.11 meq/g for cadmium and lead respectively). Xanthation was verified at 30ºC and at 5-10ºC with NaOH and CS2. The best performance of xanthation, determined by Infrared spectrometry and ion exchange experiments, ocurred at low temperatures maybe due to CS2 volatility. By diminishing the particle size of coal the exchange capacity increased. The exchange capacity was evaluated by flame atomic absorption spectrometry.

Tipo de elemento: Article
Palabras claves no controlados: Subbituminous coal, cation exchange, exchangers xanthates
Materias: Q Ciencia > QD Química
Divisiones: Ciencias Químicas
Usuario depositante: Química Hoy FCQ
Creadores:
CreadorEmailORCID
Gómez de Arco, LewisNO ESPECIFICADONO ESPECIFICADO
Alzate Rodríguez, LilianaNO ESPECIFICADONO ESPECIFICADO
Colpas Castillo, FredyNO ESPECIFICADONO ESPECIFICADO
Fernández Maestre, RobertoNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 19 Feb 2018 20:34
Última modificación: 19 Feb 2018 20:34
URI: http://eprints.uanl.mx/id/eprint/13466

Actions (login required)

Ver elemento Ver elemento

Downloads

Downloads per month over past year