Clays and clay minerals occur under a fairly limited range of geologic conditions. The environments of formation include soil horizons, continental and marine sediments, geothermal fields, volcanic deposits, and …
This paper demonstrates the latest developments in particle-scale modelling of a clay. It shows that by creating an initial sample of platelets featuring aggregated stacks, excellent macroscopic behaviour is achieved. This approach is justified by examining SEM images of clay slurries, and is consistent with the behaviour of real clays. The use of …
Sedimentation velocity analytical ultracentrifugation is a powerful and versatile tool for the characterization of proteins and macromolecular complexes in solution. The direct modeling of the sedimentation process using modern computational strategies allows among...
The characterististics common to all clay minerals derive from their chemical composition, layered structure, and size. Clay minerals all have a great affinity for water. Some swell easily and may double in thickness when wet. Most have the ability to soak up ions (electrically charged atoms and molecules) from a solution …
Sedimentation is one of the most basic process in the formation of offshore soil structure in nature. Many studies have been performed to describe the characteristics of clay sedimentation, based ...
Two clay-rich coastal sediment samples have been characterised together with three pure clays identified as major components of the sediment samples. The mineralogy of the sediments was determined by X-ray diffraction, and their bulk properties measured (organic carbon content, leachable iron and manganese, surface area and cation exchange …
In the light of these results, we hope that the statistical characterization of sedimentation velocity will contribute to new modelling perspectives bymoving from deterministic to probabilistic models of saltation and suspension.
The main purpose of this work was to evaluate the effect of curli on bacteria-clay aggregation using abundant clay minerals (montmorillonite and kaolinite). The interactions were studied by evaluating aggregation-sedimentation trends between clays and curli-producing or curli-deficient E. coli using sedimentation experiments and …
Soil texture refers to the proportions of sand (2.0 – 0.05 mm in diameter), silt (0.05 – 0.002 mm), and clay (less than 0.002 mm). The relative proportions determine the textural class. Soil texture influences nearly every aspect of soil use and management. Many of the physical and chemical properties of the soil depend on how fine (clayey ...
An efficient rate of sedimentation and a high solids content of the material are two prerequisites for this process. To understand the geotechnical behavior of laterite slurries under ambient ...
This study presents a cascade process for the purification of natural palygorskite (Pal) clay. The purification conditions were optimized using respon…
Here the authors show that reverse weathering reactions, such as the formation of glauconite minerals, are first-order controls on element sequestration in shallow marine sediments throughout ...
Of all the various types of sediment, fine-grained sediments with a high proportion of clay minerals are by far the most abundant. In the marine environment, terrigenous (land-derived) muds cover about 60% of the continental shelves, and almost …
The characterization of the clay fraction shows that the sodium clay purified (OTNa) consists of a sodium montmorillonite smectite.
Thepiezoelectricbenderelementsensorsareusefulformeasur ingnotonlytheverticalshearwave velocity, but also the horizontal shear wave velocity …
The mineralogy of samples (clay fraction and associated minerals) was determined by X-ray powder diffraction and FT-IR analysis, and the chemical composition was obtained by ICP. The main clay fraction of the samples was smectite and illite with significant amount of kaolinite.
Sedimentation is one of the most basic processes in the formation of a soil structure in nature. Many studies have been performed to describe the characteristics of clay sedimentation, based on settlement and water content measurement. In addition, there have been some attempts in numerical modeling to describe soil structure …
The performance of a newly developed separation analyzer is demonstrated by characterization of the sedimentation kinetics and the swelling behavior of organoclays in binary solvent mixtures (toluene/cyclohexane) as well as by investigation of oil-in-water and water-in-oil emulsions stabilized by clay derivatives.
Of all the various types of sediment, fine-grained sediments with a high proportion of clay minerals are by far the most abundant. In the marine environment, terrigenous (land-derived) muds cover about 60% of the continental shelves, and almost 40% of the deep ocean...
Here we present evidence for substantial iron sequestration during the early diagenetic formation of ferruginous clay minerals, also called green-clay authigenesis, in the deep-sea environment of ...
The sedimentation rates of laterite ore slurries are affected by the coarseness of the grind, the clay size fraction, the presence of clay minerals and nonclay fine materials, and the chemistry of the pore water.
This, together with the homogenous composition of the clay size fraction points to (1) a homogenous overprint of the clay assemblage during burial and/or (2) a uniform siliciclastic sedimentary supply throughout the sedimentation period of the OPA.
Soil texture is an important aspect of soil and is important for plant growth. This activity will provide a more quantitative measure of soil texture. Using the soil characterization protocol will only give a basic description of the soil. To expand on soil, you can use this bottle method to determine how much sand, silt or clay is in the soil.
The aim of the work is to prepare biocosmetic products (colored clays) in powder form. These products were prepared using a natural clay and natural flower. The green synthesis of colored clays by state solid-reaction was described. The samples were characterized samples by X-ray diffraction (XRD), Fourier transform infrared (FTIR) …
In this paper, the influence of initial water content on the sedimentation characteristics of soft clay is studied through the experiment. The results show that: (1) the sedimentation process of ...
Dive into the research topics of 'Characterization of clay sedimentation using piezoelectric bender elements'. Together they form a unique fingerprint.
Semantic Scholar extracted view of "Particle-size characterization of flocs and sedimentation volume in electrolyte clay suspensions" by M. Ohtsubo et al.
The sedimentation process was applied at least three times successively on each clay fraction until the mass ratio of the dispersed particle collected in the solution was found negligible with respect to the total amount of pristine material (i.e. 5 g).
A modified procedure for bentonite purification and a new method for the quantitative characterization of bentonite using smectite content are reported. Bentonite found in a drill core of Tsunagi Mine, Niigata, Japan was evaluated by the new method to demonstrate the substantial increase in smectite content from 40% in the original …
In this paper, the influence of initial water content on the sedimentation characteristics of soft clay is studied through the experiment. The results show that: (1) the sedimentation process of soft clay can be divided into two stages: sedimentation stage and self weight consolidation stage.
Sedimentation is one of the most basic processes in the formation of a soil structure in nature. Many studies have been performed to describe the characteristics of clay …
This paper presents a mineralogical and physicochemical characterization of a Colombian clay found in an area with the greatest exploitation potential of smectites and possible use as an adsorbent for the removal of chromium. The clay was characterized ...
Clay minerals and their modified derivatives have been widely explored and developed in heavy metal management, and solid–liquid separation through …
