Abstract
Differences and similarities between natural diatomite from Mascara, Algeria and its acid washed and microwave irradiated product have been assessed in this study using Laser Induced Breakdown Spectroscopy (LIBS). LIBS is demonstrated as a multi-elemental analysis technique of geological samples with a fast response. Diatomite is commonly used as filtration aid, mild abrasive in products such as metal polishes, adsorbent for liquids, and as porous support for chemical catalysts. LIBS analyses confirmed the reduction of calcium, magnesium, iron or sodium in treated diatomite with respect to natural one, which improves its characteristics as filters or as adsorbents. In the present study, the contents of Ca, Mg and K in the diatomite samples were analyzed with LIBS. Finally, Field Emission Scanning Electron Microscopy (FESEM) was employed for describing the morphology and microstructure of these materials.
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