NDLI: Characterization and antibacterial activity of silver exchanged regenerated NaY zeolite from surfactant-modified NaY zeolite.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Salim, Mashitah Mad Malek, Nik Ahmad Nizam Nik
Description	Country affiliation: Malaysia Author Affiliation: Salim MM ( Department of Biotechnology and Medical Engineering, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, 81310 Johor, Malaysia.); Malek NA ( Department of Biotechnology and Medical Engineering, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, 81310 Johor, Malaysia. Electronic address: niknizam@fbb.utm.my.)
Abstract	The antibacterial activity of regenerated NaY zeolite (thermal treatment from cetyltrimethyl ammonium bromide (CTAB)-modified NaY zeolite and pretreatment with Na ions) loaded with silver ions were examined using the broth dilution minimum inhibitory concentration (MIC) method against Escherichia coli (E. coli ATCC 11229) and Staphylococcus aureus (S. aureus ATCC 6538). X-ray diffraction (XRD), attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and chemical elemental analyses were used to characterize the regenerated NaY and AgY zeolites. The XRD patterns indicated that the calcination and addition of silver ions on regenerated NaY zeolite did not affect the structure of the regenerated NaY zeolite as the characteristic peaks of the NaY zeolite were retained, and no new peaks were observed. The regenerated AgY zeolite showed good antibacterial activity against both bacteria strains in distilled water, and the antibacterial activity of the samples increased with increasing Ag loaded on the regenerated AgY zeolite; the regenerated AgY zeolite was more effective against E. coli than S. aureus. However, the antibacterial activity of the regenerated AgY was not effective in saline solution for both bacteria. The study showed that CTAB-modified NaY zeolite materials could be regenerated to NaY zeolite using thermal treatment (550°C, 5h) and this material has excellent performance as an antibacterial agent after silver ions loading.
File Format	HTM / HTML
ISSN	09284931
Volume Number	59
e-ISSN	18730191
Journal	Materials Science and Engineering: C
Language	English
Publisher	Elsevier
Publisher Date	2016-02-01
Publisher Place	Netherlands
Access Restriction	Subscribed
Subject Keyword	Discipline Materials Science Anti-bacterial Agents Escherichia Coli Growth & Development Silver Staphylococcus Aureus Surface-active Agents Chemistry Zeolites Pharmacology Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Biomaterials Condensed Matter Physics Bioengineering Mechanical Engineering

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