Registration Number
0225U000848,
(0120U105416)
, R & D reports
Title
Modification of natural clinoptilolite with silver under the action of electromagnetic and acoustic radiation
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Модифікування природного клиноптилоліту сріблом під дією електромагнітних та акустичних випромінювань
Head
Znak Zenovii O., Доктор технічних наук
Registration Date
20-01-2025
Organization
Lviv Polytechnic National University
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Investigate the influence of electromagnetic and ultrasonic radiation on the dehydration processes of natural clinoptilolite and its sorption capacity relative to silver ion for obtaining sorbents with antibacterial properties
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An analysis of sources of information on the use of natural clinoptilolite in various areas was carried out. Special attention is focused on the application of natural clinoptilolite in water purification technologies. It is shown that the modification of natural clinoptilolite, in particular, with silver, makes it possible to significantly improve its operational characteristics. For example, modification with silver gives the sorbent additional antibacterial action. In order to intensify the process of sorption of silver ions from the precursor used for modification, namely silver nitrate, physical methods were chosen. These include electromagnetic oscillations of the ultra-high frequency range and acoustic oscillations of the ultrasound range. Electromagnetic radiation was used to dehydrate natural clinoptilolite before its modification. It was established that thanks to this treatment, the sorption capacity of clinoptilolite increases, and energy costs are significantly lower than during thermal activation of the sorbent. Direct modification of clinoptilolite with silver by electromagnetic radiation increases the sorption capacity. Modification of clinoptilolite under the influence of ultrasonic radiation also helps to increase its sorption capacity. This is caused by an increase in the rate of diffusion phenomena. Using the method of energy dispersive analysis, it was established that the modification of clinoptilolite occurs by the mechanism of ion exchange. The morphology of clinoptilolite before and after modification with zero-valent silver was studied using electron microscopy. Differential thermal analysis established that the sorption capacity of modified clinoptilolite with respect to water vapor increases after modification. Silver-modified clinoptilolite is advisable to use as a filter load in water purification technologies.
Product Description
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Matviiv Taras I.
Matskiv Marian Ya.
Mnykh Roman V.
Pyrih Marta A.
Sukhatskyi Yurii V.
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2025-01-20
