Antibacterial and antifouling activities of chitosan/TiO2/Ag NPs nanocomposite films against packaged drinking water bacterial isolates

被引：30
作者：
Natarajan, Saravanan [1 ]
Bhuvaneshwari, M. [1 ]
Lakshmi, D. Shanthana [2 ]
Mrudula, P. [1 ]
Chandrasekaran, N. [1 ]
Mukherjee, Amitava [1 ]
机构：
[1] VIT Univ, Ctr Nanobiotechnol, Vellore 632014, Tamil Nadu, India
[2] Council Sci & Ind Res CSIR, Reverse Osmosis Membrane Div, CSIR Cent Salt & Marine Chem Res Inst CSIR CSMCRI, GB Marg 11, Bhavnagar 364002, Gujarat, India
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2016年 / 23卷 / 19期
关键词：
Chitosan/TiO2/Ag nanocomposite; Consortium; Antibacterial activity; UV-C; Dark; LOW EXPOSURE CONCENTRATIONS; DARK CONDITIONS; NANOPARTICLE COMPOSITE; ANTIMICROBIAL ACTIVITY; ESCHERICHIA-COLI; BANGLADESH; CYTOTOXICITY; PARTICLES; PATHOGENS; LIGHT;
D O I：
10.1007/s11356-016-7102-6
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
TiO2 and Ag NPs are widely used as antibacterial agents against many bacterial pathogens. Chitosan (polymer) itself acts as a strong antibacterial agent. Hence, chitosan/TiO2/Ag NPs incorporated nanocomposite film was prepared against packed drinking water bacterial strains. A concentration-dependent increase in the reduction of cell viability was observed in all the isolates under UV-C and dark exposure conditions. The bacteria consortium showed greater resistance against antibacterial effects of chitosan/TiO2/Ag nanocomposite as compared to single isolates. Glycocalyx test and mass assessment conclude the effective antibacterial activity by inhibiting bacterial adhesion on the film surface. The release of LDH and generation of ROS act as the predominant antibacterial mechanism induced by TiO2/Ag NPs. Surface characterization of chitosan/TiO2/Ag nanocomposite was studied by FTIR and XRD analyses and SEM analysis after interaction with the bacteria.
引用
收藏
页码：19529 / 19540
页数：12
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