USO DE BIOSÓLIDOS COMO REACTIVO ESPUMANTE EN PROCESOS DE FLOTACIÓN: CARACTERIZACIÓN FÍSICA Y QUÍMICA
Cargando...
Archivos
Fecha
2011
Profesor/a Guía
Facultad/escuela
Idioma
es
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Nacional de Colombia
Nombre de Curso
Licencia CC
Licencia CC
Resumen
RESUMEN: La flotación espumosa usa diversos reactivos, orgánicos e inorgánicos, para aumentar el rendimiento y selectividad del proceso. La flotación utiliza sustancias tensoactivas que se adsorben en la interfase aire/agua. Como potenciales sustitutos de los espumantes usados actualmente, se consideran los residuos orgánicos de origen animal, como los biosólidos. Este estudio, evalúa el uso de biosólidos y ácidos húmicos como agentes espumantes para flotación espumosa, cuantificándose su capacidad tensoactiva y para formar y estabilizar espumas. Biosólidos son capaces de cambiar la tensión superficial de una solución, crear y estabilizar espumas. Dosis menores a 4 g L-1 muestran un afecto tensoactivo mayor comparado con reactivos espumantes, tipo MIBC. Para un uso efectivo de biosólidos, se requiere realizar una etapa de preacondicionamiento, que permita separar la fracción soluble y coloidal que tiene la capacidad tensoactiva. El uso de biosólidos a gran escala necesita investigación adicional para escalar los resultados obtenidos en laboratorio.
ABSTRACT: Froth flotation uses various organic and inorganic reagents to increase performance and selectivity of the flotation process. Froth flotation takes place mediated by tensioactive substances that are adsorbed on the air/water interface. Potential substitutes for the currently used frothers, organic wastes of animal origin, like biosolids are found. This study was to evaluate biosolids and humic acids as foaming agents in froth flotation by quantification of their tensioactive capabilities, foam-forming potential and foam stability. Biosolids was able to change the surface tension of a solution, creating and stabilizing foams. Dosages under 4 g L-1 of flotation reagents showed a better tensioactive effect using biosolids instead of conventional flotation reagents, type MIBC. For an effective use of these substances as frothers, it is recommended to consider a preconditioning stage. That stage will permit separating soluble and colloidal fractions that show a tensioactive effect. Further research will be needed in order to scale-up current laboratory assays to operational mining scales.
ABSTRACT: Froth flotation uses various organic and inorganic reagents to increase performance and selectivity of the flotation process. Froth flotation takes place mediated by tensioactive substances that are adsorbed on the air/water interface. Potential substitutes for the currently used frothers, organic wastes of animal origin, like biosolids are found. This study was to evaluate biosolids and humic acids as foaming agents in froth flotation by quantification of their tensioactive capabilities, foam-forming potential and foam stability. Biosolids was able to change the surface tension of a solution, creating and stabilizing foams. Dosages under 4 g L-1 of flotation reagents showed a better tensioactive effect using biosolids instead of conventional flotation reagents, type MIBC. For an effective use of these substances as frothers, it is recommended to consider a preconditioning stage. That stage will permit separating soluble and colloidal fractions that show a tensioactive effect. Further research will be needed in order to scale-up current laboratory assays to operational mining scales.
Notas
Indexación: Web of Science; Scielo
Palabras clave
Espuma, Lodos sanitarios, Materia orgánica, Concentrado
Citación
Dyna rev.fac.nac.minas vol.78 no.167 Medellín July/Sept. 2011