Remoción de mercurio en lixiviados de un relleno sanitario empleando carbón activado impregnado con azufre
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Fecha
2017
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Editor
Corporación Universitaria Lasallista
Resumen
Introduction. La Esmeralda landfill leachate,
Manizales, (Colombia), has a high mercury
concentration, which is a highly toxic metal for both
human health and ecosystems. Mercury adsorption
in solution upon activated carbon is an efficient
method for its removal, and the modification of
activated carbon surface with sulfur improves the
adsorption capacity of this metal in aqueous means.
Objective. To evaluate the mercury removal
present in landfill leachate using activated carbon
impregnated in sulfur. Materials and methods. A
basic physical chemical characterization to leachate
and activated carbon impregnated with disulphide
carbon (CA-CS2) was made. The influence of pH,
contact time and doze of CA-CS2 upon mercury
removal present in leachate was analyzed. Results.
The leachate presented a mercury concentration
316,1510,42 µg/L and, to pH of 8,0, the CA-CS2
achieved an average mercury removal of 44,761,39
%. The impregnation of activated carbon with CS2
regarding the CA increased the mercury removal
present in leachate between 21.29 and 38.66% in
pH range evaluated. Data of adsorption isothermal
were adjusted to Langmuir model and an adsorption
capacity of mercury of 24.651.46 µg/g of CA-CS2
was obtained. Conclusions. The modification of
activated carbon by means of sulfur impregnation
showed an increase of the mercury adsorption
capacity in landfill leachate.
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Palabras clave
Corporación Universitaria Lasallista, Área Metropolitana del Valle de Aburrá, Mercurio, Lixiviados, Carbón activado, Adsorción, Azufre, Rellenos sanitarios
Citación
Revista Producción + Limpia Vol. 12 N. 1