Bacterial interactions and transport in geological formation of alumino-silica clays

Vu, Kien A.; Yang, Guang; Wang, Boya; Tawfiq, Kamal; Chen, Gang

doi:10.1016/j.colsurfb.2014.11.015

Cited by 19 publications

(9 citation statements)

References 21 publications

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“…This change would decrease the repulsive electrostatic forces and subsequently increase bacterial retention. As demonstrated in previous studies, decreased electrostatic forces would lead to an increase in attachment coefficient, which directly contributed to the retention of bacteria (Li et al, 2004; Vu et al, 2015). However, the increase of bacterial retention was not observed for P. aeruginosa.…”

Section: Resultsmentioning

confidence: 65%

“…The bottom of the column was sealed with a custom fit to permit the flow of water and retain the soil. Packing of the column was conducted through carbon dioxide solvation to eliminate air pockets as described in the previous study (Vu et al, 2015). After packing, the column was flushed by nanopure deionized water overnight until the introduction of Cd.…”

Section: Methodsmentioning

confidence: 99%

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Cadmium–Bacteria Complexation and Subsequent Bacteria‐Facilitated Cadmium Transport in Saturated Porous Media

Li¹,

Zhang²,

Li³

et al. 2019

J of Env Quality

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Cadmium (Cd) contamination is becoming a significant environmental concern due to its persistency in soil. In the subsurface, the fate and transport of Cd are significantly affected by the presence of organic carriers, including bacteria, which are ubiquitous. In this research, facilitated Cd transport by four different bacterial strains in zeolite was investigated by column experiments under three different Cd introduction scenarios (i.e., a Cd and bacteria mixture, Cd and bacteria introduced separately but simultaneously, and Cd added to the column, followed by bacterial flushing), through which Cd–bacteria complexes formed. In turn, Cd–bacteria complexation affected bacterial transport. Bacteria were least retarded when Cd was pre‐deposited, with mass recovery>90% for all strains. More Cd was recovered when introduced as a mixture with bacteria (i.e., Cd mass recovery ranging from 16 to 25%). Obtained bacteria and Cd breakthrough curves were simulated by the attachment–detachment model in Hydrus‐1D. Damkohler number and reversibility were both found to be suitable to control the mass recovery of Cd and bacteria in all investigated scenarios. Core Ideas The introduction scenario significantly affected the transport of Cd and bacteria. Cd was most recovered when Cd–bacteria complexation was fully developed. Attachment, detachment, and convection competition determines Cd breakthrough.

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Section: Resultsmentioning

confidence: 65%

Section: Methodsmentioning

confidence: 99%

Cadmium–Bacteria Complexation and Subsequent Bacteria‐Facilitated Cadmium Transport in Saturated Porous Media

Li¹,

Zhang²,

Li³

et al. 2019

J of Env Quality

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“…After settling down on the polyethylene sheet, the bacterial or SeNP aggregates may slide or roll down on the tilted screen, depending on the forces and torques applied to the aggregates due to the gravity force ( G ), the buoyant force ( F b ), and the Lifshitz–van der Waals attraction force ( F LW ) . The repulsive electrostatic interaction forces ( F EL ) is neglected due to the double-layer superimposition of the aggregates and the polyethylene screen. , Sliding is not discussed in this work since the energy barrier for sliding is larger than that for rolling . The criterion of rolling is illustrated in Figure and mathematically determined by the torque balance value T : where G is the gravity force calculated in eq , F b is the buoyant force calculated in eq , R is the radius of the bacterial or SeNP aggregate, F LW is the Lifshitz–van der Waals attraction force calculated in eq , θ is angle of the polyethylene sheet (45° in this study), and λ is the water decay length of 0.6 nm …”

Section: Resultsmentioning

confidence: 99%

“…44 The repulsive electrostatic interaction forces (F EL ) is neglected due to the double-layer superimposition of the aggregates and the polyethylene screen. 45,46 Sliding is not discussed in this work since the energy barrier for sliding is larger than that for rolling. 47 The criterion of rolling is illustrated in Figure 7 and mathematically determined by the torque balance value T:…”

Section: Environmental Science and Technologymentioning

confidence: 99%

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Chemical-Free Recovery of Elemental Selenium from Selenate-Contaminated Water by a System Combining a Biological Reactor, a Bacterium–Nanoparticle Separator, and a Tangential Flow Filter

Zhang

Adedeji

Chen

et al. 2018

Environ. Sci. Technol.

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Biological selenate (SeO 4 2− ) reduction to elemental selenium nanoparticles (SeNPs) has been intensively studied but little practiced because of the additional cost associated with separation of SeNPs from water. Recovery of the SeNPs as a valuable resource has been researched to make the approach more competitive. Separation of the intracellular SeNPs from the biomass usually requires the addition of chemicals. In this research, a novel approach that combined a biological reactor, a bacterium−SeNP separator, and a tangential flow ultrafiltration module (TFU) was investigated to biologically reduce selenate and separate the SeNPs, biomass, and water from each other. This approach efficiently removed and recovered selenium while eliminating the use of chemicals for separation. The three units in the approach worked in synergism to achieve the separation and recovery. The TFU module retained the biomass in the system, which increased the biomass retention time and allowed for more biomass decay through which intracellular SeNPs could be released and recovered. SeNP aggregates were separated from bacterial aggregates due to their different interactions with a tilted polyethylene sheet in the bacterium−SeNP separator. SeNP aggregates stayed on the polyethylene sheet while bacterial aggregates settled down to the bottom of the separator.

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Microbe–biomolecule–mineral Interfacial Reactions

Chorover

2022

Multi‐Scale Biogeochemical Processes in Soil Ecosystems

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Bacterial interactions and transport in geological formation of alumino-silica clays

Cited by 19 publications

References 21 publications

Cadmium–Bacteria Complexation and Subsequent Bacteria‐Facilitated Cadmium Transport in Saturated Porous Media

Cadmium–Bacteria Complexation and Subsequent Bacteria‐Facilitated Cadmium Transport in Saturated Porous Media

Chemical-Free Recovery of Elemental Selenium from Selenate-Contaminated Water by a System Combining a Biological Reactor, a Bacterium–Nanoparticle Separator, and a Tangential Flow Filter

Microbe–biomolecule–mineral Interfacial Reactions

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