Adhesion of Ferroplasma acidiphilum onto pyrite calculated from the extended DLVO theory using the van Oss–Good–Chaudhury approach

Farahat, Mohsen; Hirajima, Tsuyoshi; Sasaki, Keiko

doi:10.1016/j.jcis.2010.05.091

Cited by 41 publications

(31 citation statements)

References 32 publications

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“…The size of the cells and the surface charge of both bacterial cell and sand grain surfaces are the two most important factors that influence the cell-sand energy interactions. Additionally, recent findings suggested that hydrophobic interactions can also be a significant component of the overall interaction between bacterial cells and mineral surfaces and thus can play important roles in the attachment of cells to the surface of minerals (Bayoudh et al 2006;Farahat et al 2009Farahat et al , 2010Ong et al 1999;Sharma and Rao 2003).…”

Section: Cell Viability Zeta Potential Hydrophobicity and Sizementioning

confidence: 99%

Influence of Desiccation on the Transport of Escherichia coli through Saturated Sand Packs

Walczak

Wang

Feriancikova

et al. 2011

Water Air Soil Pollut

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Bacterial cells that enter the groundwater system commonly experience desiccation stresses (i. e., bacterial cells are directly exposed to air) when traveling through the unsaturated layer of soil. Little is known about the effects of desiccation on the transport of bacterial cells in the groundwater system. In this research, we investigated the transport of desiccated and non-desiccated Escherichia coli K12 (ATCC 10798) cells through saturated sand packs using laboratory column transport experiments. Cell desiccation was performed at 25°C under relative humidity (RH) levels of 22%, 53%, 75%, and 97%, respectively, and the desiccation duration was 22 h. Our results showed that desiccation reduced the viability of E. coli cells under all RH levels and increased the transport of E. coli cells under ≥75% RH levels. The increase in the transport of the desiccated E. coli cells was not related to changes in cell size or cell zeta potential. Desiccation under high (i.e., ≥75%) RH levels, however, led to lower cell hydrophobicity, which was found to be positively correlated with cell transport.

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Section: Cell Viability Zeta Potential Hydrophobicity and Sizementioning

confidence: 99%

Influence of Desiccation on the Transport of Escherichia coli through Saturated Sand Packs

Walczak

Wang

Feriancikova

et al. 2011

Water Air Soil Pollut

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“…7 In the past decades, extensive studies have been performed on the initial stage of biofilm formation, especially on the adhesion of bacteria on well-characterized minerals and inert surfaces (e.g., kaolinite, montmorillonite, goethite, hematite, quartz, corundum, and glass). The investigated factors include bacterial strain, 8,9 mineral type, 10,11 solution chemistry, 12,13 cell surface features (e.g., proteins and polysaccharides), 14,15 and organic matter. 16,17 In the subsequent stage of adhesion, bacteria began to respond to the surface and undergo biological changes in order to overcome the potential energy barrier imposed by the physical–chemical forces, resulting in biofilm formation and maintenance.…”

Section: Introductionmentioning

confidence: 99%

Bacillus subtilis biofilm development in the presence of soil clay minerals and iron oxides

Peng

Walker

et al. 2017

npj Biofilms Microbiomes

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Clay minerals and metal oxides, as important parts of the soil matrix, play crucial roles in the development of microbial communities. However, the mechanism underlying such a process, particularly on the formation of soil biofilm, remains poorly understood. Here, we investigated the effects of montmorillonite, kaolinite, and goethite on the biofilm formation of the representative soil bacteria Bacillus subtilis. The bacterial biofilm formation in goethite was found to be impaired in the initial 24 h but burst at 48 h in the liquid–air interface. Confocal laser scanning microscopy showed that the biofilm biomass in goethite was 3–16 times that of the control, montmorillonite, and kaolinite at 48 h. Live/Dead staining showed that cells had the highest death rate of 60% after 4 h of contact with goethite, followed by kaolinite and montmorillonite. Atomic force microscopy showed that the interaction between goethite and bacteria may injure bacterial cells by puncturing cell wall, leading to the swarming of bacteria toward the liquid–air interface. Additionally, the expressions of abrB and sinR, key players in regulating the biofilm formation, were upregulated at 24 h and downregulated at 48 h in goethite, indicating the initial adaptation of the cells to minerals. A model was proposed to describe the effects of goethite on the biofilm formation. Our findings may facilitate a better understanding of the roles of soil clays in biofilm development and the manipulation of bacterial compositions through controlling the biofilm in soils.

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“…Escherichia coli, a strain with hydrophobic properties, was found to act as collector for quartz (Farahat et al, 2008(Farahat et al, , 2009), on the other hand, strains with hydrophilic nature like Thiobacillus ferroxidans (Nagaoka et al, 1999;Attia et al, 1993), Thiobacillus thiooxidans (Chandraprabha and Natarajan, 2005) and Ferroplasma acidiphilum (Farahat et al 2010) were found to act as good depressants for pyrite. The surface properties of microbial cells including surface charge and hydrophobicity depend on the nutrition conditions and surrounding environment (Sharma et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Hydrophilicity of Ferroplasma acidiphilum and its effect on the depression of pyrite

Farahat

Hirajima

2012

Minerals Engineering

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Adhesion of Ferroplasma acidiphilum onto pyrite calculated from the extended DLVO theory using the van Oss–Good–Chaudhury approach

Cited by 41 publications

References 32 publications

Influence of Desiccation on the Transport of Escherichia coli through Saturated Sand Packs

Influence of Desiccation on the Transport of Escherichia coli through Saturated Sand Packs

Bacillus subtilis biofilm development in the presence of soil clay minerals and iron oxides

Hydrophilicity of Ferroplasma acidiphilum and its effect on the depression of pyrite

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