Comparison of the sorption capacity of synthetic zeolite and phosphates of divalent metals

Keywords

synthetic zeolite, phosphate, modification, mechanochemical synthesis, sorption, aluminum alloy, steel.

Cite as

Halaichak S. A., Datsko B. M., Holovchuk M. Ya., and Dyachuk A. I. Comparison of the sorption capacity of synthetic zeolite and phosphates of divalent metals. Physico­chemical Mechanics of Materials. 2022. 58(4), 081-085.

Abstract

Ecologically safe pigments based on synthetic zeolite and monophosphates of zinc, calcium and manganese were obtained by mechanochemical synthesis. The optimal conditions for their dispersion were established: 200 rpm for 60 min. Using the method of electron micro­scopy and energy dispersive analysis, the surface morphology and elemental composition of the obtained pigment were determined, which indicated the intercalation of phosphorus and relevant metals into the zeolite structure. The desorption of phosphate anions in 0.1% NaCl increases in the series Na-A/Zn(H₂PO₄)₂–Na-A/Ca(H₂PO₄)₂–Na-A/Mn(H₂PO₄)₂, the maximum concentration for all compositions is found after 48 h exposure. The concentra­tion of desorbed phosphate anions in the studied medium during mechanochemical syn­thesis is ~ 2 times higher than in ion exchange. The obtained results indicate the effecti­veness of the mechanochemically obtained pigment based on zinc monophosphate and zeolite as part of paint coatings for the protection of structures made of aluminum alloys.

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