SYNTHESIS AND STUDY OF PROPERTIES OF POLYMER IMPRINTED ON LEAD IONS

Abstract

Abstract. Introduction. 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.