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.

中文翻译：

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通过激光诱导击穿光谱 (LIBS) 表征天然和处理过的硅藻土

摘要 本研究使用激光诱导击穿光谱 (LIBS) 评估了来自阿尔及利亚睫毛膏的天然硅藻土与其酸洗和微波辐照产品之间的差异和相似之处。LIBS 被证明是一种快速响应的地质样品多元素分析技术。硅藻土通常用作助滤剂、金属抛光剂等产品中的温和磨料、液体吸附剂以及化学催化剂的多孔载体。LIBS 分析证实，与天然硅藻土相比，处理过的硅藻土中的钙、镁、铁或钠减少，这改善了其作为过滤器或吸附剂的特性。在本研究中，使用 LIBS 分析了硅藻土样品中 Ca、Mg 和 K 的含量。最后，