Colloid straining within saturated heterogeneous porous media

Porubcan, A.; Xu, Shangping

doi:10.1016/j.watres.2010.11.037

Cited by 86 publications

(54 citation statements)

References 38 publications

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“…The zeta potential of the GO particles suspended in the NaCl solutions were measured (≥5 measurements) using a Brookhaven ZetaPALS analyzer. Silica sands were firstly pulverized and the colloid-sized particles thus produced were suspended in various NaCl solutions to determine their zeta potential values in a similar fashion [28,29].…”

Section: Energy Interactions Between Go Particles and Quartz Sandsmentioning

confidence: 99%

Deposition and remobilization of graphene oxide within saturated sand packs

Feriancikova

2012

Journal of Hazardous Materials

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141

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Section: Energy Interactions Between Go Particles and Quartz Sandsmentioning

confidence: 99%

Deposition and remobilization of graphene oxide within saturated sand packs

Feriancikova

2012

Journal of Hazardous Materials

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141

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“…The saturated columns were wet-packed with silica sands (size range, 0.707-0.841 mm) that were alternately cleaned with hot, concentrated nitric acids (to remove surface metal oxide and hydroxide impurities) and diluted NaOH (to remove fine particles that were attached to the surface of sand grains; Porubcan and Xu 2011). The porosity of the sand was determined through bulk density method and equaled 0.356 (Porubcan and Xu 2011). Peristaltic pumps were used to maintain a constant specific discharge value of 0.31 cm/min.…”

Section: Column Transport Experimentsmentioning

confidence: 99%

“…The zeta potential of the bacterial cells was then calculated using the Smoluchowski equation. To determine the zeta potential of the quartz sand, the cleaned sands were pulverized and the colloid-sized quartz particles thus produced were suspended in the buffered NaCl solution and the zeta potential values were determined similarly using the ZetaPALS analyzer (Porubcan and Xu 2011). Triplicate measurements were performed for each sample.…”

Section: Determination Of the Zeta Potential Of E Coli Cells And Quamentioning

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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“…soil mineral) and divalent cations (Nara et al, 2013;Kloster et al, 2013), aggregation of GO may be enhanced. As a consequence, the particle size may increase and then their passage through the pore channels could be limited (Porubcan and Xu, 2011). Accordingly, mathematic models that consider this straining mechanism are strongly needed to simulate the transport of GO in porous media.…”

Section: Introductionmentioning

confidence: 99%