
handle: 10261/4641
[ES] Las propiedades de un material cerámico están íntimamente relacionadas con el procesamiento seguido para su obtención, dado que éste determina en gran medida su microestructura. En este trabajo se ha diseñado un material cerámico, obtenido a partir de materias primas alternativas (residuos industriales y urbanos), encaminado a retener metales pesados en aguas contaminadas, siguiendo tres procesos distintos: colaje en molde de escayola, prensado uniaxial y extrusión. Para establecer una comparativa entre ellos se han preparado, en los tres casos, en forma de anillos Raschig. Se ha procedido a la caracterización físicoquímica de los materiales así obtenidos, observándose su microestructura mediante microscopía electrónica de barrido, superficie específica (BET), medidas de densidad en mercurio y helio, absorción de agua y porosidad. Asimismo se ha realizado un ensayo dinámico de retención de metales pesados con estos anillos en aguas simuladas, llevando a cabo análisis químicos mediante ICP-OES en las aguas depuradas.
[EN] Properties of ceramic materials are directly related with process followed for their production, since the process is determining microstructure. In this work a ceramic material from industrial and urban wastes has been designed and set out for retaining heavy metals from industrial contaminated waters, following three different processes: slip casting, uniaxial pressing and extrusion. These materials have been shaped as Raschig rings to establish a comparison between them, in three cases. A physical-chemical characterisation of the material has been performed. The microstructure was studied by SEM, specific surface area (BET), mercury and helium density measurements, water absorption and porosity. Additionally, a dynamic immobilisation experiment was performed with these rings in simulated waters containing heavy metals. Chemical analyses were carried out by ICP-OES technique in treated waters.
A la CICYT por la financiación (proyecto AMB99-1187 y DP12000- 0153-P4-0)
Peer reviewed
Raschig Rings, Clay industries. Ceramics. Glass, Forming process, TP785-869, Materiales porosos, Heavy metals, Procesos de conformado, Porous materials, Aguas contaminadas, Metales pesados, Waste waters, Anillos Raschig
Raschig Rings, Clay industries. Ceramics. Glass, Forming process, TP785-869, Materiales porosos, Heavy metals, Procesos de conformado, Porous materials, Aguas contaminadas, Metales pesados, Waste waters, Anillos Raschig
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