Particle Interaction and Rheology of Illite-Iron Oxide Complexes

Ohtsubo, Masami; Yoshimura, Akiko; Wada, Shin Ichiro; Yong, Raymono N.

doi:10.1346/ccmn.1991.0390402

Cited by 29 publications

(6 citation statements)

References 16 publications

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“…Moreover, negatively charged particles may weaken or prevent virus adsorption. Glacial particles in the Faselfad lakes are mainly composed of muscovite and illite 16 , which bear a negative charge 26 27 . Since phages seem to be negatively charged 28 , viruses in glacial turbid lakes may not efficiently adsorb to particles.…”

Section: Discussionmentioning

confidence: 99%

Are viruses important in the plankton of highly turbid glacier-fed lakes?

Drewes

Peter

Sommaruga

2016

Sci Rep

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Viruses are ubiquitous in aquatic ecosystems where they significantly contribute to microbial mortality. In glacier-fed turbid lakes, however, viruses not only encounter low host abundances, but also a high number of suspended mineral particles introduced by glacier meltwaters. We hypothesized that these particles potentially lead to unspecific adsorption and removal of free virus from the plankton, and thus significantly reduce their abundance in this type of lake. We followed the distribution of free virus-like particles (VLP) during the ice-free season across a turbidity gradient in four alpine lakes including one adjacent clear system where hydrological connectivity to the receding glacier is already lost. In the glacier-fed turbid lakes, VLP abundance increased with distance to the glacier, but the highest numbers were observed in the clear lake by the end of August, coinciding with the maximum in prokaryotic abundance. Our results suggest that viral loss by attachment to particles is less important than expected. Nevertheless, the relatively lower variability in VLP abundance and the lower virus-to-prokaryote ratio found in the turbid lakes than in the clear one point to a rather low temporal turnover and thus, to a reduced impact on microbial communities.

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Section: Discussionmentioning

confidence: 99%

Are viruses important in the plankton of highly turbid glacier-fed lakes?

Drewes

Peter

Sommaruga

2016

Sci Rep

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“…The above mentioned reactions in marine clays result in the production of iron hydroxide and sulphate ions as per the following equations (Ohtsubo et al, 1991;Adachi et al, 1992;Ohtsubo, 1995;Hawkins and Pinches, 1997) …”

Section: Ettringite In Marine Claysmentioning

confidence: 99%

Sulphate attack and ettringite formation in the lime and cement stabilized marine clays

Rajasekaran¹

2005

Ocean Engineering

207

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“…Figure 3). Ohtsubo et al (1991) report that positively charged Fe-oxides remain in solution as soon as the negative surface charges of the counterpart are neutralized. Such shielding effects could not be observed for Il neg due to the coexistence of equivalent amounts of positively charged Gt and negatively charged Il particles which permits the association of Gt with Il or Qz over an entire range of different Il/Gt area fractions (except 0%).…”

Section: Discussionmentioning

confidence: 99%

Application of a Cellular Automaton Method to Model the Structure Formation in Soils Under Saturated Conditions: A Mechanistic Approach

Rupp

Guhra

Meier

et al. 2019

Front. Environ. Sci.

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Soil functions are closely related to the structure of soil microaggregates. Yet, the mechanisms controlling the establishment of soil structure are diverse and partly unknown. Hence, the understanding of soil processes and functions requires the connection of the concepts on the formation and consolidation of soil structural elements across scales that are hard to observe experimentally. At the bottom level, the dynamics of microaggregate development and restructuring build the basis for transport phenomena at the continuum scale. By modeling the interactions of specific minerals and/or organic matter, we aim to identify the mechanisms that control the evolution of structure and establishment of stationary aggregate properties. We present a mechanistic framework based on a cellular automaton model to simulate the interplay between the prototypic building units of soil microaggregates quartz, goethite, and illite subject to attractive and repulsive electrostatic interaction forces. The resulting structures are quantified by morphological measures. We investigated shielding effects due to charge neutralization and the aggregate growth rate in response to the net system charge. We found that the fraction as well as the size of the interacting oppositely charged constituents control the size, shape, and amount of occurring aggregates. Furthermore, the concentration in terms of the liquid solid ratio has been shown to increase the aggregation rate. We further adopt the model for an assessment of the temporal evolution of aggregate formation due to successive formation of particle dimers at early stages in comparison to higher order aggregates at later stages. With that we show the effect of composition, charge, size ratio, time, and concentration on microaggregate formation by the application of a mechanistic model which also provides predictions for soil aggregation behavior in case an observation is inhibited by experimental limitations.

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Particle Interaction and Rheology of Illite-Iron Oxide Complexes

Cited by 29 publications

References 16 publications

Are viruses important in the plankton of highly turbid glacier-fed lakes?

Are viruses important in the plankton of highly turbid glacier-fed lakes?

Sulphate attack and ettringite formation in the lime and cement stabilized marine clays

Application of a Cellular Automaton Method to Model the Structure Formation in Soils Under Saturated Conditions: A Mechanistic Approach

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