Solid phase extractive preconcentration of silver from aqueous samples and antimicrobial properties of the clinoptilolite–Ag composite

Volodymyr O Vasylechko,Viktor O Fedorenko,Oleksandr M Gromyko,Mariya T Lototska,Yaroslav M Kalychak,Olga A Zaporozhets,Galyna V Gryshchouk

doi:10.1177/0263617417703509

Abstract

Sorptive properties of the Transcarpathian clinoptilolite compared to Ag(I) were studied in a dynamic way. The sorptive capacity value of clinoptilolite under the optimal conditions is 11.7 mg of Ag per 1 g of zeolite. The solid-phase extraction procedure with natural clinoptilolite thermally activated at 550℃ was used to preconcentrate trace amounts of silver ions in aqueous solutions to be finally determined by the atomic absorption method. It was established that the Ag–clinoptilolite composite has a powerful antimicrobial effect against gram-negative bacteria and yeasts as well as affects significantly vital activity of Staphylococcus aureus.

Highlights

Silver is present in natural waters in trace quantities
The aim of this paper was to study sorptive properties of Transcarpathian clinoptilolite with respect to trace amounts of Ag(I) in aqueous solutions to develop a method of Ag(I) preconcentration in the solid-phase extraction (SPE) mode for further determination using the atomic absorption method and investigation of the antimicrobial activity of Ag–clinoptilolite composite samples
The sorption properties of Ukrainian Transcarpathian clinoptilolite regarding the aqueous solution of silver (I) ions using the dynamic technique were investigated

Summary

Introduction

Silver is present in natural waters in trace quantities. It belongs to the physiologically active components of mineral waters. The popularity of natural zeolites has increased (for SPE applications) (Al-Degs et al, 2008; Chen et al, 2009; Faghihian et al, 2009; Faghihian and Kabiri-Tadi, 2010; Fisher and Kara, 2016; Vasylechko et al, 2015, 1999b, 2001) because of a number of advantages over other sorbents These natural aluminosilicate minerals contain pores and cavities with strictly defined size and shape which results in a very effective preconcentration and separation of organic and inorganic compounds. Zeolites are characterized by mechanical strength, good stability in the aggressive medium and under thermal treatment, ability to sorb the trace amounts of analytes, high sorption capacity and selectivity, easy modification and regeneration of the sorbent, low cost, and accessibility

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