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首页> 外文期刊>Arabian Journal for Science and Engineering >Investigation of Mineralogy and Porosity of Two Pakistani Bentonites and Its Corresponding Purified Bentonites
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Investigation of Mineralogy and Porosity of Two Pakistani Bentonites and Its Corresponding Purified Bentonites

机译：两种巴基斯坦膨润土及其相应的纯化膨润土的矿物学和孔隙度研究

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摘要

Bentonite samples from Peshawar and Nowshera regions of Khyber Pakhtunkhwa (Pakistan) were collected, and their mineralogy and textural studies were carried out. It was examined by X-ray diffraction that, besides containing clay minerals such as montmorillonite and illite, both the original bentonites also contained albite and quartz. The clay fraction of (purified sample) of original bentonites was separated by Stoke's law of sedimentation from its aqueous dispersions. The equipment used for particle size analysis was Malvern Master-sizer 2000. The particle size of Nowshera samples both in raw and purified form was found smaller in comparison with Peshawar samples. The particles size difference in the two samples, even in purified form, may be attributed to the variation in particle shape. The adsorption-desorption on bentonites samples at 77 K was carried out by Micromeritics ASAP 2010 surface analyzer. The pore size distributions revealed that the selected bentonites were highly porous in nature even in raw form; however, their behavior in this regard was also found incredibly different. The specific surface area, mesopore size distribution, micropore volume/area and mesopore volume/area of Peshawar raw sample were found considerably lower than Nowshera raw sample, however, they change greatly, as a result of purification. The lower porous raw sample, i.e., Peshawar raw sample, reached to the highest porous material in purified form. The high surface area and high porous structure of bentonite especially in case of purified samples suggest their use as adsorbents, catalysts, and cosmetics raw material.
机译：收集了开伯尔·普赫图赫瓦省（巴基斯坦）的白沙瓦和诺什拉地区的膨润土样品，并进行了矿物学和组织学研究。通过X射线衍射检查，除了含有诸如蒙脱石和伊利石的粘土矿物之外，两种原始膨润土还含有钠长石和石英。原始膨润土（纯化样品）的粘土级分通过斯托克沉降定律从其水分散体中分离出来。用于粒度分析的设备是Malvern Master-sizer2000。与白沙瓦样品相比，Nowshera样品的原始和纯化形式的粒度均较小。即使是纯化形式，两个样品中的颗粒大小差异也可能归因于颗粒形状的变化。用Micromeritics ASAP 2010表面分析仪在膨润土样品上于77 K进行吸附-解吸。孔径分布表明，所选择的膨润土即使在未加工的状态下，也具有很高的多孔性。然而，他们在这方面的行为也被发现非常不同。发现白沙瓦原始样品的比表面积，中孔尺寸分布，微孔体积/面积和中孔体积/面积显着低于Nowshera原始样品，但是由于纯化，它们变化很大。较低的多孔原始样品，即白沙瓦原始样品，以纯化形式达到最高的多孔材料。膨润土的高表面积和高孔隙结构，特别是在纯化样品的情况下，建议将其用作吸附剂，催化剂和化妆品原料。

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