Doped ZnO nanoparticles impregnated on Kaolinite (Clay): A reusable nanocomposite for photocatalytic disinfection of multidrug resistant Enterobacter sp. under visible light

Journal of Colloid and Interface Science
Ananyo Jyoti MisraSuraj K Tripathy

Abstract

Water contamination by multidrug resistant (MDR) enteric bacteria can be considered as the foremost cause of gastrointestinal infections and poses a threat to global public health. Therefore, there is an urgent need to pursue unorthodox techniques with potential of community scale applications for purging of water borne pathogenic bacteria. We communicate visible-light assisted photocatalytic disinfection (PCD) of an enteric MDR bacterium; Enterobacter sp. using Fe-doped ZnO nanoparticles impregnated on Kaolinite (Clay) (ZnO/K). ZnO/K was synthesized by co-precipitation technique and was found to be more effective than Fe-doped ZnO (ZnO) and Kaolinite for PCD process. Analysis from fluorescence microscopy and electron microscopy (FESEM) proposed complete bacterial cell death via PCD due to damage of bacterial cell membrane. Experimental evidences indicated that O2- could be acting as the most significant component in disinfection of MDR Enterobacter sp. in visible-light assisted PCD process in presence of ZnO/K. Considering the experimental data of Resazurin assay, it is proposed that reactive oxygen species (ROS) generated during PCD might have impeded the oxido-reductase enzyme system of the bacteria and hence trammeling its ...Continue Reading

Citations

Jul 19, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Dan LiuChunrong Wang
Nov 24, 2019·International Journal of Environmental Research and Public Health·Ashok J Tamhankar, Cecilia Stålsby Lundborg
Jan 7, 2021·International Journal of Nanomedicine·Reham Samir HamidaMayasar Ibrahim Al-Zaban
Dec 24, 2018·The Science of the Total Environment·Ting LiXiaolei Wang
Oct 6, 2021·Materials Horizons·Jiayu ZengXuemei Wang

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