2024, Vol. 9, No. 2. - go to content...

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Mavlonov M.Kh., Chursin V.I. Interaction of plant extracts and zinc salts in aqueous solutions. Journal of Clothing Science. 2024; 9(2). Available at: https://kostumologiya.ru/PDF/17TLKL224.pdf (in Russian).

Interaction of plant extracts and zinc salts in aqueous solutions

Mavlonov Mirzoolim Khikmatovich
Russian State University named A.N. Kosygin (Technologies. Design. Art), Moscow, Russia
JSC «R-PHARM», Moscow, Russia
E-mail: mirzo_mavlonov@mail.ru

Chursin Vyacheslav Ivanovich
Russian State University named A.N. Kosygin (Technologies. Design. Art), Moscow, Russia
E-mail: mars8848@rambler.ru
RSCI: https://elibrary.ru/author_profile.asp?id=475787

Abstract. Natural renewable materials based on plant extracts are of significant scientific and practical interest due to their wide availability and excellent biodegradability. Unlike synthetic tanning agents, natural tanning agents are environmentally friendly; their use produces less harmful waste, and leather products made using natural tanning agents are characterized by a lack of allergenicity. Replacing the traditional chrome tanning system with environmentally friendly systems is a pressing issue due to the stringent environmental requirements for leather production. The use of combined tanning systems will significantly reduce the content of toxic compounds in wastewater. This article discusses the interaction of plant extracts and zinc salts in aqueous solutions and determines the spectral characteristics of the solutions studied. Based on the data obtained, the formation of complex compounds between the phenolic components of vegetable tanning agents and zinc salts was established and their optimal ratios were determined. It has been shown that zinc in the presence of a polyphenolic ligand forms stable complexes due to charge transfer from the ligand to the metal atom. Polyphenolic compounds containing aromatic hydroxyl groups are involved in the formation of stable zinc-polyphenol complexes. The formation of large complexes was confirmed by thin layer chromatography. For each analyzed variant, the distribution coefficient values were calculated in the chromatograms after separation. The influence of the class of tannides, the type of zinc salt and the pH value on the yield of the precipitate obtained as a result of the interaction of the studied solutions is shown.

Keywords: vegetable tanning agent; zinc salts; spectrophotometry; thin layer chromatography; complexation; tannids; ligand

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