SYNTHESIS AND STUDY OF PROPERTIES OF POLYMER IMPRINTED ON LEAD IONS

With the development of modern technologies, there is a growing interest of researchers in the synthesis of molecularly imprinted polymers (MIPs). Due to their unique properties and ability to molecular recognition, MIPs find increasingly wider areas of application. Recently, humic acids (HA) have attracted increasing attention in the development of polymeric materials due to their availability and prospects from both a scientific and practical point of view. The aim of the work was to chemically synthesize lead-imprinted polymer (PbIP) and non-imprinted polymer (NIP) based on humic acids, capable of molecular recognition of lead, to obtain physicochemical characteristics, study sorption properties and evaluate their application as a sorption material. The methodology of the work includes the synthesis of PbIP and NIP, determination of their composition using the methods of elemental analysis, IR-spectroscopy, conductometry, scanning electron microscope and determination of the adsorption capacity of PbIP and NIP using an atomic emission spectrometer with inductively coupled plasma. The results showed that PbIP has a higher sorption capacity for Pb2+ ions than NIP. The degree of extraction of Pb2+ ions for PbIP was 71%, while for NIP it was 55%. This indicates that PbIP shows good characteristics due to the selective active centers formed in the process of molecular imprinting and confirms the prospects of its use. Conclusion. The obtained PbIP demonstrated high sorption capacity for lead compared to NIP and can be recommended as a selective sorption material.