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Abstract
n the work, a comparative morphometric analysis of various types of domestic adsorbents intended for use in water purification technologies is performed. Four types of adsorbents were investigated: «Möbius» carbon adsorbent, P1T1KA clay powder of the montmorillonite type, DG-100 carbon black, C-1 colloidal graphite preparation.Morphometric analysis of adsorbent particles was carried out by the method of optical polarization microscopy («Bi-olam» brand microscope). Photomicrographs of particles pre-dispersed in the immersion liquid were obtained using a digital camera with a high-resolution matrix. Quantitative assessment of the sizes of adsorbent particles was carried out by the method of digital image analysis (ImageJ software package). The area and perimeter of individual particles were determined and their equivalent diameter and shape index were calculated. Statistical processing of experimental data was carried out using the «Statistica» software package.It was established that the nature of the distribution of particles of the investigated types of adsorbents in terms of equiv-alent diameter depends on the type of sample, and may be complicated by the processes of particle aggregation.It is shown that a similar nature of distribution is observed for all investigated carbon adsorbents according to the shape index. The pronounced and largest fraction (27-37%) corresponds to particles with a shape close to round. The most acceptable adsorbents for water purification processes can be considered a colloidal graphite preparation and clay powder of the mont-morillonite type, for which there is a higher homogeneity of the distribution of particles according to the shape indicator. This, in turn, can provide higher sorption efficiency in water treatment technologies.The application of the method of optical polarization microscopy in combination with the morphometric analysis of particles makes it possible to reasonably approach the selection of the brand of adsorbents for their use in water purification technologies. Further research in this direction can be directed to the processes of surface modification of adsorbent particles to increase their specific capacity and selective ability.
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