scholarly journals Evaluation of solar light inactivation on multidrug-resistant Escherichia coli CGMCC 1.1595

2020 ◽  
Vol 20 (6) ◽  
pp. 2216-2225
Author(s):  
Xiu-Feng Yin ◽  
Na Shi ◽  
Ting Meng ◽  
Ying-Xue Sun
Keyword(s):  
Escherichia Coli ◽  
Light Intensity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Irradiation Time ◽  
Multidrug Resistant ◽  
Light Irradiation ◽  
Solar Light ◽  
E Coli ◽  
Inactivation Efficiency

Abstract This study investigated the simulated solar light disinfection of Escherichia coli CGMCC 1.1595, a multidrug-resistant (MDR) strain resistant to tetracycline and ampicillin. With the increase of light intensity, the maximum inactivation efficiency reached 0.74 log in 60 min following visible light irradiation with an intensity of 115.8 mW/cm2 and following UVA–visible light irradiation, using a 98% UVA-ray contribution at 6.5 mW/cm2 and 95% contribution at 20.0 mW/cm2, the inactivation efficiency was up to 6.09 log. The inactivated MDR E. coli did not regrow after light irradiation or in the dark after 24 or 48 h after visible light disinfection, demonstrating that visible light disinfection can prevent MDR E. coli self-repair. The MDR E. coli plasmid electrophoresis band gradually went dark with increase of the light irradiation time and could be completely eliminated by high UVA light intensity treatment, however, simulated sunlight irradiation had minimal influence on both tetracycline and ampicillin resistance of the MDR E. coli strain.

Effective Photocatalytic Disinfection of Escherichia coli by One-Dimensional Ag2V4O11 Nanowires under Solar Light Irradiation

2013 ◽  
Vol 401-403 ◽  
pp. 771-774
Author(s):  
Peng Ju ◽  
Peng Wang ◽  
Dun Zhang
Keyword(s):  
Escherichia Coli ◽  
Visible Light ◽  
Active Species ◽  
Light Irradiation ◽  
Solar Light ◽  
One Dimensional ◽  
E Coli ◽  
Solar Light Irradiation ◽  
Absorption Performance ◽  
Almost All

In this paper, one-dimensional Ag2V4O11nanowires were prepared by a facile method and developed as a novel visible-light-sensitive photocatalyst for the disinfection of Escherichia coli (E. coli) under solar light irradiation. The as-prepared Ag2V4O11had uniform wire-like structure with large specific surface area and good visible-light absorption performance. Experimental results indicated that almost all (99.9%) of the initial bacteria were killed after 30 min reaction in the presence of 1 mg/mL Ag2V4O11under solar light irradiation. The photocatalytic mechanism was studied by active species trapping experiments, revealing that the hydroxyl radicals (·OH) played key roles in the inactivation of bacteria. This study provides a potential effective Ag2V4O11nanowire photocatalyst for water purification and other applications.

Enhanced photocatalytic bacteriostatic activity towards Escherichia coli using 3D hierarchical microsphere BiOI/BiOBr under visible light irradiation

2016 ◽  
Vol 15 (5) ◽  
pp. 666-672 ◽  
Author(s):  
Ya Wang ◽  
Li Lin ◽  
Fang Li ◽  
Liang Chen ◽  
Donghui Chen ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Separation Efficiency ◽  
Light Irradiation ◽  
Bacteriostatic Activity ◽  
E Coli

With an improved separation efficiency of photogenerated holes, the BiOI/BiOBr composite exhibited enhanced photocatalytic bacteriostatic activity towards E. coli compared to the pure BiOI or BiOBr under visible light.

scholarly journals Fabrication of AgCl/Ag3PO4/graphitic carbon nitride heterojunctions for enhanced visible light photocatalytic decomposition of methylene blue, methylparaben and E. coli

RSC Advances ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 6383-6394 ◽  
Author(s):  
Haishuai Li ◽  
Linlin Cai ◽  
Xin Wang ◽  
Huixian Shi
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Decomposition ◽  
E Coli ◽  
Visible Light Photocatalytic

A noval ternary nanocomposite AgCl/Ag3PO4/g-C3N4 was successfully synthesized for photocatalytic degradation of methylene blue, methylparaben and inactivation of E. coli under visible light irradiation, showing excellent photocatalytic degradation performance and stability.

Preparation of azo-dye sensitized TiO 2 photocatalyst for inhibition of E-Coli bacteria under visible light irradiation

2017 ◽  
Vol 4 (11) ◽  
pp. 11671-11678
Author(s):  
M. Giridhar ◽  
H.S. BhojyaNaik ◽  
R. Vishwanath ◽  
C.N. Sudhamani ◽  
M.C. Prabakar ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Azo Dye ◽  
Light Irradiation ◽  
E Coli ◽  
Dye Sensitized

scholarly journals Synthesis of Carbon Doped TiO2 Quantum Dots for Photocatalytic Sterilization under the Visible Light Irradiation and the Mechanisms

2019 ◽  
Vol 118 ◽  
pp. 01013 ◽  
Author(s):  
Wei Xiong ◽  
Altair T.F. Cheung ◽  
Michael K.H. Leung
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Superoxide Radical ◽  
Light Irradiation ◽  
Doping Amount ◽  
E Coli ◽  
Carbon Doped ◽  
Chemical States ◽  
Self Protection

In this article, the carbon doped TiO2 (C-TiO2) quantum dots (QDs) were prepared through the hydrothermal method and calcination. The size of the C-TiO2 QDs is about 5.7 nm. The doping amount of carbon can be tuned by adjusting the volumes of the carbon source, ethylene glycol added. The carbon atoms are proved to be doped into the interstitial sites of TiO2 lattice and induce the change of chemical states of Ti 2p and C 1s. The doping of carbon leads to the increasing photocatalytic sterilization of E. coli under the visible light irradiation. The survival rate of E. coli cells over C-TiO2 is only 1.5 % after 6 h. The reactive oxygen species (ROS), such as hydroxyl radical and superoxide radical, are considered as the primary factors for the photocatalytic sterilization. Due to oxidative stress of the attack by ROS, the enzyme activity per cells increases for self-protection during the photocatalytic sterilization.

Enhanced photocatalytic disinfection of E. coli 8099 using Ag/BiOI composite under visible light irradiation

2012 ◽  
Vol 91 ◽  
pp. 59-66 ◽  
Author(s):  
Linfei Zhu ◽  
Chun He ◽  
Yanling Huang ◽  
Zhuohua Chen ◽  
Dehua Xia ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
E Coli ◽  
Photocatalytic Disinfection
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