Elaboration and Characterization of Natural Diatomite in Aktyubinsk/Kazakhstan

H. Mohamedbakr, M. Burkitbaev
2009 The Open Mineralogy Journal  
This study investigated the structure, mineralogical specifics and chemical composition, of a natural and modified diatomite ore, which obtained from the Aktyubinsk /Kazakhstan deposits by using SEM, XRF, XRD, FTIR, TGA and SDTA. Three modified forms of diatomite's were prepared by calcinations at 900 o C and/or calcinations and acidification by 0.5 N HCl (D, D-HCl, D-900 and D-900-HCl). The iron(Fe 2 O 3 ) and silica (SiO 2 ) contents in natural raw diatomite were about 3.9 % and SiO 2 80.23 %
more » ... % and SiO 2 80.23 % respectively. Whereas, the modified diatomite which treated with 0.5 N HCl followed calcination at 900 o C revealed 0.92% and 84.75% of Fe 2 O 3 and SiO 2 respectively. This proved that the elimination of the impurities which may be found as clay minerals, especially mica and kaolinite. The SEM micrographs investigation of acid activation and/or acid activation followed by calcinations showed the original geometry of the pores to be preserved, but there is collapse in the skeleton structure.
doi:10.2174/1874456700903010012 fatcat:qibp7fadb5ba3f35g6blpswv7e