Porous Adsorption Materials Synthesized by Simultaneous Calcination of Inorganic and Organic Industrial Solid Wastes

Ryo Sasai*, Kouji Ukai*, Takashi Hirose*, Takashi Kojima*, Hideaki Itoh*
Katsuya Shibaguchi**, Hisashi Matsuba** and Takuichiro Sugiyama**
* Research Center for Advanced Waste and Emission Management
(ResCWE), Nagoya University
** SUGIYAMA CONTEC INC.
+ Correspondence should be addressed to Hideaki Itoh:
(Furo-cho, Chikusa-ku, Nagoya, 464-8603 Japan)

Abstract
Porous materials with a high adsorption ability were synthesized by the simultaneous calcination of a mixture of inorganic and organic industrial solid wastes. The microstructure, mechanical strength, and adsorption characteristics were investigated. Sludge and Rasping were mixed with clay minerals and water, and then mulled and extruded to form a green rod. Porous materials were synthesized by calcination in air at 850*C[Celsius degeree]. SEM observation of the porous material exhibited the honeycomb sectors originated from the fibrous structure of rasping, and the macro-pores formed by a foam-evaporating calcination of the sludge and clay. Analysis of the microstructures and mechanical properties of the porous materials prepared with different mixing ratios, revealed that each raw material played an important role in the feature of the material, i.e, (1) sludge contributed to the high mechanical strength of the bulk, and (2) clay particles inhibited the combustion of rasping, which led to the carbonization of rasping. Synthesized porous materials were found to have a high adsorption ability for methylene blue. It was demonstrated from the adsorption measurements for the porous materials with different mixing ratios, that the adsorption ability was greatly affected by the structure and properties of the calcined clay minerals.

Key words: industrial solid wastes, reuse, porous adsorption materials, clay