Preparation of humidity-controlling porous ceramics from volcanic ash and waste glass

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Title:	Preparation of humidity-controlling porous ceramics from volcanic ash and waste glass
Authors:	Vu,DH;Wang,KS;Nam,BX;Bac,BH;Chu,TC
Contributors:	環境工程研究所
Keywords:	WATER-VAPOR ADSORPTION;ACTIVATED CARBON;MICROSTRUCTURE DEVELOPMENT;MOISTURE ABSORPTION;PORE DISTRIBUTION;BEHAVIOR;ALLOPHANE;POWDERS;PARTICLES;SEPIOLITE
Date:	2011
Issue Date:	2012-03-27 17:05:07 (UTC+8)
Publisher:	國立中央大學
Abstract:	This work investigated the preparation of a humidity-controlling porous ceramic via sintering of a mixture of volcanic ash soil and waste glass at 800-815 degrees C for 5-10 min. The final products were analyzed to identify the porous and mechanical properties, the moisture adsorption-desorption performance characteristics, and the adsorbed moisture amount. The most superior ceramic product, manufactured by mixing 30% weathered volcanic ash and 70% waste glass, was sintered at 800 degrees C for 5 min. The porous properties included a BET surface area of 163.73 +/- 12 m(2)/g, porosity of 52.08 +/- 2.1%, and a pore size of approximately 9 nm in diameter. The total amount of water adsorbed by the superior ceramic product was 0.047 cm(3)/g. In addition, the mechanical characteristics, including a bulk density of 1.34 +/- 0.2 g/cm(3), 2.61 +/- 0.1% shrinkage, 4.64 +/- 0.3% ignition loss, and 6.58 +/- 0.4 MPa bending strength, are consistent with those of commercial porous ceramics. The leaching concentration of heavy metals in the final products were all well below the TCLP regulation limits. Thus, the most superior products meet the standards for commercial porous ceramics. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Relation:	CERAMICS INTERNATIONAL
Appears in Collections:	[Graduate Institute of Environmental Engineering ] journal & Dissertation

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