The antimicrobial efficiency of silver activated sorbents
Source abstract
Abstract
Abstract This study is focused on the surface modifications of the materials that are used for antimicrobial water treatment. Sorbents of different origin were activated by Ag+-ions. The selection of the most appropriate materials and the most effective activation agents was done according to the results of the sorption and desorption kinetic studies. Sorption capacities of selected sorbents: granulated activated carbon (GAC), zeolite (Z), and titanium dioxide (T), activated by Ag+-ions were following: 42.06, 13.51 and 17.53 mg/g, respectively. The antimicrobial activity of Ag/Z, Ag/GAC and Ag/T sorbents were tested against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and yeast C. albicans. After 15 min of exposure period, the highest cell removal was obtained using Ag/Z against S. aureus and E. coli, 98.8 and 93.5%, respectively. Yeast cell inactivation was unsatisfactory for all three activated sorbents. The antimicrobial pathway of the activated sorbents has been examined by two separate tests – Ag+-ions desorbed from the activated surface to the aqueous phase and microbial cell removal caused by the Ag+-ions from the solid phase (activated surface sites). The results indicated that disinfection process significantly depended on the microbial-activated sites interactions on the modified surface. The chemical state of the activating agent had crucial impact to the inhibition rate. The characterization of the native and modified sorbents was performed by X-ray diffraction technique, X-ray photoelectron spectroscopy and scanning electron microscope. The concentration of adsorbed and released ions was determined by inductively coupled plasma optical emission spectroscopy and mass spectrometry. The antimicrobial efficiency of activated sorbents was related not only to the concentration of the activating agent, but moreover on the surface characteristics of the material, which affects the distribution and the accessibility of the activating agent.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nanoparticles: synthesis and applications · Adsorption and biosorption for pollutant removal · Pharmaceutical and Antibiotic Environmental Impacts
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (55)
Show source-provided references
1. Adsorption of zink (Zn2+) from aqueous solution on natural bentonite10.1016/j.desal.2010.09.041 ↗
2. The potential of ball-milled Serbian natural clay for removal of heavy metal contaminants from wastewaters: Simultaneous sorption of Ni, Cr, Cd and Pb ions10.1016/j.ceramint.2013.02.061 ↗
3. Adsorption of glycine on montmorillonite in aqueous solutions10.1016/j.clay.2013.05.007 ↗
4. Antibacterial activity of heavy metal-loaded natural zeolite10.1016/j.jhazmat.2011.11.079 ↗
5. On the zink sorption by the Serbian natural clinoptilolite and the disinfecting ability and phosphate affinity of the exhausted sorbent10.1016/j.jhazmat.2010.09.048 ↗
6. Preparation and properties of silver nanoparticles loaded in activated carbon for biological and environmental applications10.1016/j.jhazmat.2011.06.044 ↗
7. Removal of lead and zink ions from water by low cost sorbents10.1016/j.jhazmat.2009.02.026 ↗
8. Examination of zink uptake in a combined system using sludge, minerals and ultrafiltration membranes10.1016/j.jhazmat.2010.05.101 ↗
9. Antibacterial silver10.1155/MBD.1994.467 ↗
10. Structure of surfactant–clay complexes and their sorptive characteristics toward HOCs10.1016/j.seppur.2008.04.009 ↗
11. Organoclays of high-charge synthetic clays and alumina pillared natural clays: perchlorate uptake10.1016/j.clay.2013.06.001 ↗
12. Removal of E. coli from urban storm water using antimicrobial-modified filter media10.1016/j.jhazmat.2014.01.057 ↗
13. Unites States Environmental Protection Agency, EPA · 2011
14. World Health Organization (WHO) · 1996 · vol. 2
15. Directive 2006/7/EC of the European Parliament and of the Council of 15 February 2006 concerning the management of bathing water quality and repealing Directive 76/160/EEC, Off. J. Eur. Union, L64/37.
16. Silver supported on natural Mexican zeolite as an antimicrobial material10.1016/S1387-1811(00)00217-1 ↗
17. Mode of bactericidal action of silver zeolite and its comparison with that of the silver nitrate10.1128/AEM.69.7.4278-4281.2003 ↗
18. Antibacterial activity of montmorillonites doped with silver10.1016/j.molcata.2007.10.024 ↗
19. Light irradiation is a factor in the bactericidal activity of silver-loaded zeolite10.1248/cpb.56.692 ↗
20. The removal of bacteria by modified natural zeolites10.1081/ESE-100104132 ↗
21. Silver, zink, and copper exchange in a Na-clinoptilolite and resulting effect on antimicrobial activity10.1016/j.clay.2003.12.002 ↗
22. Antimicrobial action and efficiency of silver-loaded zeolite X10.1111/j.1365-2672.2007.03673.x ↗
23. Antibacterial and antifungal activities of silver, copper and zinc montmorillonites10.1016/j.clay.2011.05.016 ↗
24. Antibacterial activity of copper monodispersed nanoparticles onto sepiolite10.1007/s10853-006-0432-x ↗
25. Photocatalytic activity of silver-modified titanium-dioxide at solid–liquid and solid–gas interferences10.1016/j.colsurfa.2007.11.030 ↗
26. Structure and photocatalysis activity of silver doped titanium oxide nanotubes array for degradation of pollutants10.1016/j.spmi.2013.06.013 ↗
27. Effect of cerium dioxide, titanium dioxide, silver, and gold nanparticles on the activity of microbial intended in wastewater treatment10.1016/j.jhazmat.2011.10.057 ↗
28. Virus inactivation by silver doped titanium dioxide nanparticles for drinking water treatment10.1016/j.watres.2010.09.012 ↗
29. Development of silver/titanium dioxide/chitosan adipate nanocomposite as an antibacterial coating for fruit storage10.1016/j.lwt.2015.04.049 ↗
30. Silver film on nanocrystalline TiO2 support: photocatalytic and antimicrobial ability10.1016/j.materresbull.2014.09.073 ↗
31. Effect of a Romanian zeolite on heavy metals transfer from polluted soil to corn, mustard and oat
32. Arsenic removal from water using low-cost adsorbents – a comparative study10.2298/JSC101029122J ↗
33. Combustion of active carbon as a model carbon material: comparison of non-catalytic and catalytic oxidation
34. The sorption of cyanides from the water onto activated carbon
35. ADSORBSIA AS600, Titanium Based Adsorbent Material Safety Data Sheet, The Dow Chemical Company http://www.dowwaterandprocess.com/en/Products/A/ADSORBSIA_AS600 (last access 02.08.15).
36. Adsorption of silver from aqueous solution to onto raw vermiculite and manganese oxide-modified vermiculite10.1016/j.micromeso.2012.12.004 ↗
37. Gould · 1962
38. The effect of different extractants on lead desorption from natural minerals10.1016/j.apsusc.2014.10.112 ↗
39. Activity of antibacterial compounds immobilised on montmorillonite10.1016/j.clay.2008.11.003 ↗
40. Bactericidal effects of different silver-containing materials10.1016/j.materresbull.2011.06.041 ↗
41. Antimicrobial activity of faujasite doped with silver10.1016/j.micromeso.2012.05.006 ↗
42. A discussion of silver as an antimicrobial agent: alleviating the confusion
43. Electrochemical analysis of the redox state of silver contained in antibacterial material10.4236/jbnb.2012.32019 ↗
44. Surface characterization of electrodeposited silver on activated carbon for bactericidal purposes10.1016/j.jcis.2007.05.062 ↗
45. Antibacterial action of silver-doped activated carbon prepared by vacuum impregnation10.1016/j.apsusc.2012.11.084 ↗
46. Evaluation of diffusion and dilution methods to determine the antimicrobial activity of water-soluble chitosan derivatives10.1111/jam.12111 ↗
47. Mechanism of adsorption of gold and silver species on activated carbons10.1016/S0008-6223(98)00091-8 ↗
48. Study on the crystalline structure and the thermal stability of silver-oxide films deposited by using direct-current reactive magnetron sputtering methods
49. Greenwood · 1997
50. Energy calibration in electron spectroscopy and the re-determination of some reference electron binding energies10.1016/0368-2048(80)85050-X ↗
51. Complete oxidation of formaldehyde over Ag/MnOx–CeO2 catalysts10.1016/j.cej.2006.02.002 ↗
52. X-ray photoelectron spectroscopy of silver nanoparticles in phosphate glass10.1016/j.matlet.2010.07.004 ↗
53. Surface and bulk composition, structure, and photocatalytic activity of phosphate-modified TiO210.1021/cm070692r ↗
54. Coexistence of silver and titanium dioxide nanoparticles: enhancing or reducing environmental risk?10.1016/j.aquatox.2014.05.020 ↗
55. Catalase activity in Candida albicans exposed to antineoplastic drugs10.1099/jmm.0.46263-0 ↗