NDLI: Zn$^{2+}$-exchange kinetics and antimicrobial properties of synthetic zirconium umbite (K$_{2}$ZrSi$_{3}$O$_{9}$·H$

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Zn$^{2+}$-exchange kinetics and antimicrobial properties of synthetic zirconium umbite (K$_{2}$ZrSi$_{3}$O$_{9}$·H$_{2}$O)

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Zn$^{2+}$-exchange kinetics and antimicrobial properties of synthetic zirconium umbite (K$_{2}$ZrSi$_{3}$O$_{9}$·H$_{2}$O)

Content Provider	Springer Nature Link
Author	Coleman, Nichola J. Lewis, Samantha P. Mendham, Andrew P. Trivedi, Vivek
Copyright Year	2009
Abstract	Zirconium umbite, K$_{2}$ZrSi$_{3}$O$_{9}$·H$_{2}$O, is a microporous framework ion exchanger whose potential as a carrier for Zn$^{2+}$ ions in antimicrobial formulations has not yet been investigated. Accordingly, batch Zn$^{2+}$-exchange kinetics of synthetic zirconium umbite (K-UM) and the subsequent antimicrobial action of the zinc-bearing phase (Zn-UM) against Staphylococcus aureus and Escherichia coli are reported. Nonstoicheiometric over-exchange of Zn$^{2+}$ for K$^{+}$ was observed and attributed to hydrolysis and complexation reactions of Zn$^{2+}$ within the umbite framework. The exchange process, which was described by a simple pseudo-first-order model (k $_{1}$ = 2.69 × 10$^{−4}$ min$^{−1}$, R $^{2}$ = 0.992), did not achieve equilibrium within 120 h at 25 °C, by which time the uptake of zinc was found to be 1.04 mmol g$^{−1}$. The minimal bactericidal concentrations of Zn-UM for E. coli and S. aureus were found to be >10 g cm$^{3}$ and <1.0 g cm$^{3}$, respectively.
Starting Page	747
Ending Page	753
Page Count	7
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	17
Issue Number	6
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2009-12-22
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Framework zirconium silicate Umbite Ion-exchange Pseudo-first-order kinetics Zinc Antimicrobial Physical Chemistry Characterization and Evaluation of Materials Catalysis
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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Zn$^{2+}$-exchange kinetics and antimicrobial properties of synthetic zirconium umbite (K$_{2}$ZrSi$_{3}$O$_{9}$·H$_{2}$O)

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Zn$^{2+}$-exchange kinetics and antimicrobial properties of synthetic zirconium umbite (K$_{2}$ZrSi$_{3}$O$_{9}$·H$_{2}$O)