Surface modification of porous suspended ceramsite used for water treatment by activated carbon/Fe3O4 magnetic composites.
Environ Technol
; 34(13-16): 2301-7, 2013.
Article
en En
| MEDLINE
| ID: mdl-24350485
ABSTRACT
In this study, porous suspended ceramsite with a specific density close to that of water was prepared by high-temperature calcination using fly ash, feldspar, calcite, fired talc and kaolin as the raw materials. The ceramsite was modified by activated carbon/Fe3O4 magnetic composites. The optimum modification conditions determined by methylene blue adsorption experiment were KOH/glucose ratio of 1.51, carbonization temperature of 400 degrees C, activation temperature of 850 degrees C, activation time of 1 h, and Fe3O4/KOH+glucose ratio of 110. The results demonstrated that the adsorption capacity of the modified ceramsite for methylene blue was significantly higher than that of the unmodified ones. The presence of the composites did not lead to significant decrease in the mechanical properties of the modified ceramsite. Moreover, the modified ceramsite showed good resistance towards acid and alkali. The modified ceramsite can be used as biocarrier and adsorbent for a wide range of contaminants in water and can subsequently be removed from the medium by a simple magnetic procedure.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Carbono
/
Silicatos
/
Purificación del Agua
/
Nanopartículas de Magnetita
/
Materiales Manufacturados
Idioma:
En
Revista:
Environ Technol
Asunto de la revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Año:
2013
Tipo del documento:
Article
País de afiliación:
China