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Antibacterial Inactivation of Escherichia coli after TiO2-Fe3O4-Bentonite Photocatalytic Treatment

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@article{IJASEIT3884,
   author = {Restu Kartiko Widi and Emma Savitri and Olivia Angelina and Sherlly Caroline O. J and Arief Budhyantoro},
   title = {Antibacterial Inactivation of Escherichia coli after TiO2-Fe3O4-Bentonite Photocatalytic Treatment},
   journal = {International Journal on Advanced Science, Engineering and Information Technology},
   volume = {8},
   number = {6},
   year = {2018},
   pages = {2367--2373},
   keywords = {TiO2; photocatalytic; disinfection; inactivation kinetics; E.coli},
   abstract = {

TiO2-Fe3O4–Bentonite photocatalytic material has been developed to inactivate of Escherichia coli. The syntheses of the TiO2-Fe3O4 based photocatalyst have been carried out by sol-gel method. The bentonite used for porous support was obtained from Pacitan, Indonesia. The photocatalyst material will capture energy of UV radiation followed by the electron excitation and oxidation-reduction reactions. Because of the processes, the various types of pollutants and microorganisms can be decomposed and reduced. The electron excitation will induce the formation of hydroxyl radical and O2. These radicals are responsible to decompose the cell wall of bacteria and further damage the bacteria’s cytoplasmic membrane. Decomposing of cytoplasmic membrane causes lipid peroxidation in the membrane, and then losing their viability. It is followed by the death of bacterial cell. This study conducted a series of Escherichia coli inactivation by using photocatalyst material of TiO2-Fe3O4-Bentonite which was irradiated with UV light. The photocatalytic inactivation of Escherichia coli was conducted in a reactor under ultraviolet (325 nm) exposing. The photocatalytic degradation was observed for 5 hours to determine the optimum initial bacteria concentration, intensity of UV light and also photocatalyst concentration. The inactivation kinetic was approached by Chick-Watson and Hom kinetic models. The colonies calculations were conducted by Total Plate Count. The optimum condition was achieved for 300 minutes process to reach 7 bacterial log reduction units for an average bacterial inoculum size of 3.8 × 104 CFU/ml. All disinfection experiments showed a non-linear bacterial inactivation kinetic profile, which is started with shoulder lag followed by a log reduction and the tailing curve. The inactivation kinetics of Escherichia coli using TiO2-Fe3O4-Bentonitephotocatalytic material system satisfactorily obeyed the Hom kinetic model.

},    issn = {2088-5334},    publisher = {INSIGHT - Indonesian Society for Knowledge and Human Development},    url = {http://ijaseit.insightsociety.org/index.php?option=com_content&view=article&id=9&Itemid=1&article_id=3884},    doi = {10.18517/ijaseit.8.6.3884} }

EndNote

%A Widi, Restu Kartiko
%A Savitri, Emma
%A Angelina, Olivia
%A Caroline O. J, Sherlly
%A Budhyantoro, Arief
%D 2018
%T Antibacterial Inactivation of Escherichia coli after TiO2-Fe3O4-Bentonite Photocatalytic Treatment
%B 2018
%9 TiO2; photocatalytic; disinfection; inactivation kinetics; E.coli
%! Antibacterial Inactivation of Escherichia coli after TiO2-Fe3O4-Bentonite Photocatalytic Treatment
%K TiO2; photocatalytic; disinfection; inactivation kinetics; E.coli
%X 

TiO2-Fe3O4–Bentonite photocatalytic material has been developed to inactivate of Escherichia coli. The syntheses of the TiO2-Fe3O4 based photocatalyst have been carried out by sol-gel method. The bentonite used for porous support was obtained from Pacitan, Indonesia. The photocatalyst material will capture energy of UV radiation followed by the electron excitation and oxidation-reduction reactions. Because of the processes, the various types of pollutants and microorganisms can be decomposed and reduced. The electron excitation will induce the formation of hydroxyl radical and O2. These radicals are responsible to decompose the cell wall of bacteria and further damage the bacteria’s cytoplasmic membrane. Decomposing of cytoplasmic membrane causes lipid peroxidation in the membrane, and then losing their viability. It is followed by the death of bacterial cell. This study conducted a series of Escherichia coli inactivation by using photocatalyst material of TiO2-Fe3O4-Bentonite which was irradiated with UV light. The photocatalytic inactivation of Escherichia coli was conducted in a reactor under ultraviolet (325 nm) exposing. The photocatalytic degradation was observed for 5 hours to determine the optimum initial bacteria concentration, intensity of UV light and also photocatalyst concentration. The inactivation kinetic was approached by Chick-Watson and Hom kinetic models. The colonies calculations were conducted by Total Plate Count. The optimum condition was achieved for 300 minutes process to reach 7 bacterial log reduction units for an average bacterial inoculum size of 3.8 × 104 CFU/ml. All disinfection experiments showed a non-linear bacterial inactivation kinetic profile, which is started with shoulder lag followed by a log reduction and the tailing curve. The inactivation kinetics of Escherichia coli using TiO2-Fe3O4-Bentonitephotocatalytic material system satisfactorily obeyed the Hom kinetic model.

%U http://ijaseit.insightsociety.org/index.php?option=com_content&view=article&id=9&Itemid=1&article_id=3884 %R doi:10.18517/ijaseit.8.6.3884 %J International Journal on Advanced Science, Engineering and Information Technology %V 8 %N 6 %@ 2088-5334

IEEE

Restu Kartiko Widi,Emma Savitri,Olivia Angelina,Sherlly Caroline O. J and Arief Budhyantoro,"Antibacterial Inactivation of Escherichia coli after TiO2-Fe3O4-Bentonite Photocatalytic Treatment," International Journal on Advanced Science, Engineering and Information Technology, vol. 8, no. 6, pp. 2367-2373, 2018. [Online]. Available: http://dx.doi.org/10.18517/ijaseit.8.6.3884.

RefMan/ProCite (RIS)

TY  - JOUR
AU  - Widi, Restu Kartiko
AU  - Savitri, Emma
AU  - Angelina, Olivia
AU  - Caroline O. J, Sherlly
AU  - Budhyantoro, Arief
PY  - 2018
TI  - Antibacterial Inactivation of Escherichia coli after TiO2-Fe3O4-Bentonite Photocatalytic Treatment
JF  - International Journal on Advanced Science, Engineering and Information Technology; Vol. 8 (2018) No. 6
Y2  - 2018
SP  - 2367
EP  - 2373
SN  - 2088-5334
PB  - INSIGHT - Indonesian Society for Knowledge and Human Development
KW  - TiO2; photocatalytic; disinfection; inactivation kinetics; E.coli
N2  - 

TiO2-Fe3O4–Bentonite photocatalytic material has been developed to inactivate of Escherichia coli. The syntheses of the TiO2-Fe3O4 based photocatalyst have been carried out by sol-gel method. The bentonite used for porous support was obtained from Pacitan, Indonesia. The photocatalyst material will capture energy of UV radiation followed by the electron excitation and oxidation-reduction reactions. Because of the processes, the various types of pollutants and microorganisms can be decomposed and reduced. The electron excitation will induce the formation of hydroxyl radical and O2. These radicals are responsible to decompose the cell wall of bacteria and further damage the bacteria’s cytoplasmic membrane. Decomposing of cytoplasmic membrane causes lipid peroxidation in the membrane, and then losing their viability. It is followed by the death of bacterial cell. This study conducted a series of Escherichia coli inactivation by using photocatalyst material of TiO2-Fe3O4-Bentonite which was irradiated with UV light. The photocatalytic inactivation of Escherichia coli was conducted in a reactor under ultraviolet (325 nm) exposing. The photocatalytic degradation was observed for 5 hours to determine the optimum initial bacteria concentration, intensity of UV light and also photocatalyst concentration. The inactivation kinetic was approached by Chick-Watson and Hom kinetic models. The colonies calculations were conducted by Total Plate Count. The optimum condition was achieved for 300 minutes process to reach 7 bacterial log reduction units for an average bacterial inoculum size of 3.8 × 104 CFU/ml. All disinfection experiments showed a non-linear bacterial inactivation kinetic profile, which is started with shoulder lag followed by a log reduction and the tailing curve. The inactivation kinetics of Escherichia coli using TiO2-Fe3O4-Bentonitephotocatalytic material system satisfactorily obeyed the Hom kinetic model.

UR - http://ijaseit.insightsociety.org/index.php?option=com_content&view=article&id=9&Itemid=1&article_id=3884 DO - 10.18517/ijaseit.8.6.3884

RefWorks

RT Journal Article
ID 3884
A1 Widi, Restu Kartiko
A1 Savitri, Emma
A1 Angelina, Olivia
A1 Caroline O. J, Sherlly
A1 Budhyantoro, Arief
T1 Antibacterial Inactivation of Escherichia coli after TiO2-Fe3O4-Bentonite Photocatalytic Treatment
JF International Journal on Advanced Science, Engineering and Information Technology
VO 8
IS 6
YR 2018
SP 2367
OP 2373
SN 2088-5334
PB INSIGHT - Indonesian Society for Knowledge and Human Development
K1 TiO2; photocatalytic; disinfection; inactivation kinetics; E.coli
AB 

TiO2-Fe3O4–Bentonite photocatalytic material has been developed to inactivate of Escherichia coli. The syntheses of the TiO2-Fe3O4 based photocatalyst have been carried out by sol-gel method. The bentonite used for porous support was obtained from Pacitan, Indonesia. The photocatalyst material will capture energy of UV radiation followed by the electron excitation and oxidation-reduction reactions. Because of the processes, the various types of pollutants and microorganisms can be decomposed and reduced. The electron excitation will induce the formation of hydroxyl radical and O2. These radicals are responsible to decompose the cell wall of bacteria and further damage the bacteria’s cytoplasmic membrane. Decomposing of cytoplasmic membrane causes lipid peroxidation in the membrane, and then losing their viability. It is followed by the death of bacterial cell. This study conducted a series of Escherichia coli inactivation by using photocatalyst material of TiO2-Fe3O4-Bentonite which was irradiated with UV light. The photocatalytic inactivation of Escherichia coli was conducted in a reactor under ultraviolet (325 nm) exposing. The photocatalytic degradation was observed for 5 hours to determine the optimum initial bacteria concentration, intensity of UV light and also photocatalyst concentration. The inactivation kinetic was approached by Chick-Watson and Hom kinetic models. The colonies calculations were conducted by Total Plate Count. The optimum condition was achieved for 300 minutes process to reach 7 bacterial log reduction units for an average bacterial inoculum size of 3.8 × 104 CFU/ml. All disinfection experiments showed a non-linear bacterial inactivation kinetic profile, which is started with shoulder lag followed by a log reduction and the tailing curve. The inactivation kinetics of Escherichia coli using TiO2-Fe3O4-Bentonitephotocatalytic material system satisfactorily obeyed the Hom kinetic model.

LK http://ijaseit.insightsociety.org/index.php?option=com_content&view=article&id=9&Itemid=1&article_id=3884 DO - 10.18517/ijaseit.8.6.3884