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首页> 外文期刊>Journal of applied sciences and environmental management >Fourier Transform Infrared Spectrophotometry and X-ray powder Diffractometry as Complementary Techniques in characterizing Clay size fraction of Kaolin
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Fourier Transform Infrared Spectrophotometry and X-ray powder Diffractometry as Complementary Techniques in characterizing Clay size fraction of Kaolin

机译：傅里叶变换红外分光光度法和X射线粉末衍射法作为表征高岭土黏土粒径分数的补充技术

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摘要

This study aimed at demonstrating complementary roles offered by both Fourier transform infrared (FTIR) spectrophotometry and x-ray powder diffraction (XRPD) techniques in characterizing clay size fraction of kaolins. The clay size fraction of kaolin samples obtained from Kgwakgwe, Makoro, Lobatse and Serule kaolin occurrences and deposits in Botswana were characterized using laser diffraction particle size analyzer (LDPSA), FTIR spectrophotometry and XRPD techniques. More than 70 wt % of the clay size fraction of these samples were < 4 μm. Main peaks in the infrared spectra reflected Al-OH, Al-O and Si-O functional groups in the high frequency stretching and low frequency bending modes and were those for kaolinite but possible absorption interference peaks for quartz, smectite and muscovite are inferred. The XRPD results identified kaolinite as the major mineral phase with confirmed presence of quartz, smectite and muscovite as minor quantities in the samples. The findings therefore suggest that XRPD technique could be used as a complementary tool when characterizing the clay fraction of kaolin using FTIR spectrophotometry.
机译：这项研究旨在证明傅里叶变换红外（FTIR）分光光度法和X射线粉末衍射（XRPD）技术在表征高岭土的粘土粒度分数方面所起的互补作用。使用激光衍射粒度分析仪（LDPSA），FTIR分光光度法和XRPD技术表征了从博茨瓦纳的Kgwakgwe，Makoro，Lobatse和Serule高岭土的发生和沉积获得的高岭土样品的粘土粒径分数。这些样品的粘土尺寸分数的超过70重量％小于4μm。红外光谱中的主峰反映了高频拉伸和低频弯曲模式下的Al-OH，Al-O和Si-O官能团，并且是高岭石的峰，但可以推断出石英，蒙脱石和白云母的可能吸收干扰峰。 XRPD结果确定高岭石为主要矿物相，并确认样品中微量存在石英，绿土和白云母。因此，这些发现表明，当使用FTIR分光光度法表征高岭土的粘土级分时，XRPD技术可以用作补充工具。

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