Caracterização de cinza de casca de arroz para uso como matéria-prima na fabricação de refratários de sílica
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In this article, a combination of surface analysis, thermal analysis and microscopy analysis techniques was used for the characterization of rice husk ash, a deriving by-product of the burning of the rice hull during the rice processing is the object of the study.Abstract:
The characterization of rice husk ash, a deriving by-product of the burning of the rice husk during the rice processing is the object of this study. This by-product, for being rich in silica, can be an important raw material for the production of siliceous ceramics, such as thermal insulators and refractory. A combination of surface analysis, thermal analysis and microscopy analysis techniques was used for the characterization. The characterized by-product presented as main component the silica, under amorphous form, with a maximum content of alkalis around 1%, features that become it potentially interesting for the production of ceramic materials.read more
Citations
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Biosorption of heavy metals using rice milling by-products. Characterisation and application for removal of metals from aqueous effluents.
TL;DR: Rice husks were investigated as a potential decontaminant of toxic heavy metals present in laboratory effluents and the ability to take up other metals species, such as Al, Cd, Cu, Pb and Zn, present in this effluent was studied.
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Removal of metal ions from aqueous solutions by sorption onto rice bran.
TL;DR: The negative Gibbs free energy values obtained in this study with rice bran confirm the feasibility of the process and the spontaneous nature of sorption.
Journal ArticleDOI
Preparation and characterization of activated carbon from rice bran.
TL;DR: Experimental results indicated the potential use of rice bran as a precursor in the activated carbon preparation process, thus representing an economically promising material.
Journal ArticleDOI
Use of modified rice husks as a natural solid adsorbent of trace metals: characterisation and development of an on-line preconcentration system for cadmium and lead determination by FAAS
TL;DR: In this article, the use of rice husks as an alternative adsorbent in an on-line preconcentration system for Cd (II) and Pb(II) determination by flame atomic absorption spectrometry was described.
Journal ArticleDOI
Systematic evaluation of amorphous silica production from rice husk ashes
TL;DR: Amorphous silica (SiO2) was extracted from the rice husk ashes (RHAs) of the agulhinha and cateto varieties, respectively, in this article.
References
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Book
Vogel's textbook of quantitative chemical analysis
TL;DR: In this paper, the principles of reaction in solution are discussed and the basis of separarative methods are discussed, as well as the safety units of Reagent Purity and Reagent Reactions in Solution.
Book
Principles of Ceramics Processing
TL;DR: In this article, the authors present a detailed table of contents of the Ceramics Processing and Ceramic Products (CPMP) and discuss the main components of the process. But they do not provide a detailed description of the procedure.