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

Mad Salim, Mashitah and Nik Malek, Nik Ahmad Nizam (2016) Characterization and antibacterial activity of silver exchanged regenerated NaY zeolite from surfactant-modified NaY zeolite. Materials Science and Engineering C, 59 . pp. 70-77. ISSN 0928-4931

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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, 5 h) and this material has excellent performance as an antibacterial agent after silver ions loading.

Item Type:Article
Uncontrolled Keywords:Bacteria, Characterization, Chemical analysis, Escherichia coli, Field emission microscopes, Fourier transform infrared spectroscopy, Heat treatment, Metal ions, Scanning electron microscopy, X ray diffraction, Anti-bacterial activity, Attenuated total reflectance Fourier transform infrared, Cetyltrimethylammonium bromide, Field emission scanning electron microscopy, Minimum inhibitory concentration, NaY zeolite, Silver ions, Staphylococcus aureus, Ions, antiinfective agent, silver, surfactant, zeolite, chemistry, Escherichia coli, growth, development and aging, Staphylococcus aureus, Anti-Bacterial Agents, Escherichia coli, Silver, Staphylococcus aureus, Surface-Active Agents, Zeolites
Subjects:Q Science > QH Natural history > QH301 Biology
Divisions:Biosciences and Medical Engineering
ID Code:73907
Deposited By: Fahmi Moksen
Deposited On:21 Nov 2017 08:17
Last Modified:21 Nov 2017 08:17

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