Preparation of silver-containing natural zeolites with improved porous characteristics as sorbents for water purification
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Дата
2022
Науковий керівник
Назва журналу
Номер ISSN
Назва тому
Видавець
КПІ ім. Ігоря Сікорського; ТОВ «Українська водна спілка»
Анотація
The widespread application of Ukrainian natural zeolites in sorption and catalysis is limited by the
shortcomings of their porous structure. Chemical modification of zeolites permits significant changes in their
properties. The purpose of this work was to obtain silver-containing natural zeolites of the clinoptilolite type
with improved porous characteristics by acid treatment and to study their antibacterial properties. Mild
dealumination of the rock was carried out using ethylenediaminetetraacetic acid for 15 hours at 90 C,
which significantly increased the specific surface area of the clinoptilolite sample to 90 m2
/g, and the volume
of micropores to 0.037 cm3
/g, determined by low-temperature nitrogen adsorption/desorption. An
establishment of a change in the chemical composition of the sample during processing by X-ray
fluorescence analysis was made. Additional modification with silver in the amount of 1 wt % was carried out
by impregnation with a solution of silver nitrate. The water of three lakes in Kyiv was studied for the total
viable count by means of sowing in nutrient agar. The results were analyzed and a sample of water was
selected to evaluate the effectiveness of the synthesized sorbent. The antibacterial properties of zeolite were
confirmed with the worst of the water samples, the quality of which, in terms of the total viable count, was
improved not only to the norms of surface water but also to the indicators for drinking water.
Опис
Ключові слова
acid modification, antimicrobial properties, argentum impregnation, natural zeolites, porous properties, total viable count, антибактеріальні властивості, загальне мікробне число, кислотне модифікування, нанесення срібла, пористі властивості, цеоліти природні
Бібліографічний опис
Preparation of silver-containing natural zeolites with improved porous characteristics as sorbents for water purification / L. Patrylak, B. Nizhnik, A. Yakovenko, O. Melnychuk, O. Pertko // Вода і водоочисні технології. Науково-технічні вісті. – 2022. – № 2(33). – С. 25-31.