Initial transport and retention behaviors of ZnO nanoparticles in quartz sand porous media coated with Escherichia coli biofilm

2013 ◽  
Vol 174 ◽  
pp. 38-49 ◽  
Author(s):  
Xujia Jiang ◽  
Xueting Wang ◽  
Meiping Tong ◽  
Hyunjung Kim
Keyword(s):  
Escherichia Coli ◽  
Porous Media ◽  
Zno Nanoparticles ◽  
Quartz Sand

Flagella and their property affect the transport and deposition behaviors of Escherichia coli in quartz sand

2021 ◽  
Author(s):  
Mengya Zhang ◽  
Lei He ◽  
Meiping Tong
Keyword(s):  
Escherichia Coli ◽  
Porous Media ◽  
Quartz Sand ◽  
Packed Column ◽  
High Mobility ◽  
Deposition Process ◽  
Flow Chamber ◽  
Chamber System ◽  
Bacterial Flagella ◽  
Silica Surfaces

<p>The effects of bacterial flagella as well as their property on the transport and deposition of bacteria were examined by using four types of <em>Escherichia coli </em>(<em>E.coli</em>) with or without flagella, as well as with normal or sticky flagella. Packed column, quartz crystal microbalance with dissipation (QCM-D), visible parallel plate flow chamber system, as well as visible flow chamber system packed with porous media system were utilized to investigate the deposition behaviors and the deposition mechanisms of bacteria with different property of flagella. We found that the presence of flagella favored <em>E.coli</em> deposition onto quartz sand/silica surfaces. Moreover, by changing the porous media porosity and directly observing the deposition process of bacteria in porous media, grain-to-grain contacts were found to be major sites for bacterial deposition. Particularly, flagella could help bacteria swim near and then deposit at grain-to-grain contacts. In addition, we found that due to the stronger adhesive forces, sticky flagella could further enhance bacterial deposition onto quartz sand/silica surfaces. Elution experiments showed that the portion of bacteria with flagella depositing onto secondary energy minima was relatively lower than bacteria without flagella, indicating that flagella could help bacteria attach onto sand surfaces more irreversibly. Clearly, flagella and their property would have obvious influence on the transport and deposition behaviors of bacteria in porous media. By removing the flagella or changing their property, the transport and deposition of bacteria in porous media can be altered. Particularly, bacterial flagella can be removed to facilitate the transport of bacteria in remediation system requiring high mobility of bacteria, while in system requiring the immobilization bacteria in porous media, bacteria with sticky flagella can be employed.</p>

scholarly journals A Wall of Funnels Concentrates Swimming Bacteria

2007 ◽  
Vol 189 (23) ◽  
pp. 8704-8707 ◽  
Author(s):  
Peter Galajda ◽  
Juan Keymer ◽  
Paul Chaikin ◽  
Robert Austin
Keyword(s):  
Escherichia Coli ◽  
Porous Media ◽  
Biological Tissue ◽  
Selection Pressure ◽  
Random Motion ◽  
Swimming Bacteria ◽  
Multistage Pump ◽  
Narrow Opening ◽  
Arbitrary Shapes ◽  
Motile Bacteria

ABSTRACT Randomly moving but self-propelled agents, such as Escherichia coli bacteria, are expected to fill a volume homogeneously. However, we show that when a population of bacteria is exposed to a microfabricated wall of funnel-shaped openings, the random motion of bacteria through the openings is rectified by tracking (trapping) of the swimming bacteria along the funnel wall. This leads to a buildup of the concentration of swimming cells on the narrow opening side of the funnel wall but no concentration of nonswimming cells. Similarly, we show that a series of such funnel walls functions as a multistage pump and can increase the concentration of motile bacteria exponentially with the number of walls. The funnel wall can be arranged along arbitrary shapes and cause the bacteria to form well-defined patterns. The funnel effect may also have implications on the transport and distribution of motile microorganisms in irregular confined environments, such as porous media, wet soil, or biological tissue, or act as a selection pressure in evolution experiments.

Individual, co-transport and deposition of TiO2 and ZnO nanoparticles over quartz sand coated with consortium biofilm

2016 ◽  
Vol 4 (4) ◽  
pp. 3954-3960 ◽  
Author(s):  
Jyoti Kumari ◽  
Natarajan Chandrasekaran ◽  
R. Nagarajan ◽  
Amitava Mukherjee
Keyword(s):  
Zno Nanoparticles ◽  
Quartz Sand

Towards understanding inter-strain attachment variations of Escherichia coli during transport in saturated quartz sand

2010 ◽  
Vol 44 (4) ◽  
pp. 1202-1212 ◽  
Author(s):  
Jan Willem Foppen ◽  
George Lutterodt ◽  
Wilfred F.M. Röling ◽  
Stefan Uhlenbrook
Keyword(s):  
Escherichia Coli ◽  
Quartz Sand

Differential Susceptibility of Escherichia coli Cells toward Transition Metal-Doped and Matrix-Embedded ZnO Nanoparticles

2010 ◽  
Vol 114 (16) ◽  
pp. 5594-5599 ◽  
Author(s):  
Ranu K. Dutta ◽  
Prashant K. Sharma ◽  
Richa Bhargava ◽  
Naresh Kumar ◽  
Avinash C. Pandey
Keyword(s):  
Escherichia Coli ◽  
Transition Metal ◽  
Zno Nanoparticles ◽  
Differential Susceptibility ◽  
Escherichia Coli Cells ◽  
Metal Doped

scholarly journals In vitro antibacterial activity of ZnO and Nd doped ZnO nanoparticles against ESBL producing Escherichia coli and Klebsiella pneumoniae

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Abdulrahman Syedahamed Haja Hameed ◽  
Chandrasekaran Karthikeyan ◽  
Abdulazees Parveez Ahamed ◽  
Nooruddin Thajuddin ◽  
Naiyf S. Alharbi ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Klebsiella Pneumoniae ◽  
Zno Nanoparticles ◽  
In Vitro Antibacterial Activity ◽  
Doped Zno
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