(PDF) Methods of the montmorillonite content determination in foundry
This paper presents results of the measurements montmorillonite content in foundry bentonites and mixtures of bentonite – lustrous carbon carrier by three methods: spectrophotometric method with ...
Gel Stability of Calcium Bentonite Suspension in Brine and …
Experiments have shown that an inferior bentonite mud forms a strong colloid with poor rheological properties at 150 °C (the so-called colloid high-temperature curing), which may prevent carrying out the drilling. ... The price of SNV32 at the concentration of 0.35% is much lower than that of HSB, and the use of SNV is very …
Stability Analysis of GMZ Bentonite Colloids: Aggregation …
DOI: 10.1016/j.colsurfa.2020.125020 Corpus ID: 219480831; Stability Analysis of GMZ Bentonite Colloids: Aggregation Mechanism Transition and the Edge Effect in Strongly Alkaline Conditions
Stability of bentonite colloid carried with kaolin-supported …
In order to improve the defects of fast sedimentation rate and poor mobility of kaolin-supported nano-zero-valent iron (K-nZVI), bentonite colloid with strong suspension and adsorption was selected as the carrier in this study, and the stability and adsorption of bentonite colloid carried with K-nZVI (B-K-nZVI) were studied. The sedimentation tests …
Unveiling the Re, Cr, and I diffusion in saturated compacted bentonite …
DOI: 10.1007/s41365-024-01456-8 Corpus ID: 270597619; Unveiling the Re, Cr, and I diffusion in saturated compacted bentonite using machine-learning methods @article{Feng2024UnveilingTR, title={Unveiling the Re, Cr, and I diffusion in saturated compacted bentonite using machine-learning methods}, author={Zhengye Feng and …
Mechanisms of bentonite colloid aggregation, retention, and …
The bentonite colloids were obtained by centrifuging a well-dispersed bentonite suspension at 8000 rpm (6347 ×g), and the detailed procedures for colloid preparation and characterization have been reported previously (Pan et al., 2011; Xu et al., 2018; Xu et al., 2020).
(PDF) Properties and test methods to assess bentonite used …
PDF | On Jan 1, 1995, T. Egloffstein published Properties and test methods to assess bentonite used in geosynthetic clay liners | Find, read and cite all the research you need on ResearchGate
Stability of GMZ bentonite colloids: Aggregation kinetic …
The stability behaviors for bentonite colloids prepared have gained a lot of attention, both the aggregation behavior and the surface charge properties (Baik and Lee 2010;Xu et al. 2018;Missana et ...
Influence of Na-bentonite Colloids on the Transport of …
The determination of Na-bentonite colloids was done online by means of a UV detector and the ICP-MS system. Characterisation of the colloid-metal interactions was based on sorption experiments and modelling calculations carried out at pH values of 5 and 7. Furthermore the stability of Na-bentonite colloids was determined in titration experiments.
Influence of bentonite colloids on the migration of the …
The content of Fe(II) ions in aqueous solutions of colloids and granite was determined using the o-phenanthroline method in the Method for the Determination of Divalent Iron Ions in Coal Mine Acidic Water (MT/T483-1995). ... Vilks P, Miller NH, Vorauer A (2008) Laboratory bentonite colloid migration experiments to support the Äspö …
BENTONITE IN MEXICO : A CHANGING& RISING MARKET
MINERALOGY, CHEMICAL COMPOSITION AND APPLICATION OF BENTONITE FROM DEH MOHAMMAD, SHIRGESHT, AND CHAH CAM 1 AND 2 (KHORASAN-YAZD, …
Evaluation of Bentonite Colloids for Potential Use as an In
3.1 Bentonite Colloid Fractionation. As described in the Methods section, the size of the particles was obtained through DLS at 25 ℃. It is obvious that colloid …
Experimental determination of colloid deposition …
The method was evaluated using four different experimental systems of increasing complexity. Short pulses (equivalent to 0.002 ... DETERMINATION OF COLLOID DEPOSITION RATES 1131 (6) • WASTE DETECTOR (5) COLUMN (2) (4) DEGASSER INJECTION LOOP Figure 1. Schematic drawing of the experimental setup used
Evaluation of Bentonite Colloids for Potential Use as an In …
The effect of gravity and centrifugal sedimentation on bentonite colloid size and size distribution was examined. ... It is obvious that colloid particle size can be reduced by sedimentation or centrifuge methods. Bentonite colloids showed ... García-García, S., Wold, S. and Jonsson, M., 2007, Kinetic determination of critical coagulation ...
Size characterization of bentonite colloids by different methods
The size and shape of colloids released from a natural bentonite into a low-mineralized groundwater are investigated using various colloid characterization methods. For the applied methods such as atomic force microscopy (AFM), laser-induced breakdown detection (UBD), photon correlation spectroscopy …
Fate and cotransport of Pb(II) and Cd(II) heavy ions with bentonite …
Determination of initial colloid flux. ... The transport of colloids, Pb(II), and the cotransport of Pb(II) with bentonite colloid, are depicted in Fig. 9 c under a background fluid with 1.12 mM NaNO 3. In the context of a solution characterized by a comparatively low ionic strength, the presence of bentonite colloids at low concentration ...
COLLOID DIFFUSION IN COMPACTED BENTONITE: …
COLLOID DIFFUSION IN COMPACTED BENTONITE: MICROSTRUCTURAL CONSTRAINTS MICHAEL HOLMBOE*, SUSANNA WOLD, AND MATS JONSSON KTH School of Chemical Science and Engineering, Nuclear Chemistry, Royal Institute of Technology, SE-100 44 Stockholm, ... (II) method is 0.75 meq/g (Karnland et al., 2006). …
Co‐transport of Cr(VI) and Bentonite Colloid in …
bentonite colloid at dierent conditions and try to provide useful information for the prediction of Cr(VI) behavior in soil-ground water system. Materials and Methods Quartz sand of 1.00–1.18 mm (16–18 mesh) and 0.250–0.425 mm (40–60 mesh) was purchased from Lan-zhirun water purication material Co., Ltd, Zhengzhou, China.
Kinetic determination of sedimentation for GMZ bentonite …
The bentonite colloid was stable in a pure water system (Xu et al., 2018), and the mean hydrodynamic diameter of the bentonite colloid in deionized water determined by the PCS was 201.4 nm, with a particle dispersion index (PDI) of 0.17 (Fig. 1 a).The XRD patterns in Fig. 1 b indicated that the main components of bentonite were …
Determination of the degree of sodic modification of …
72 for the index parameters of bentonite, and provide guidance for optimizing pellet bentonite. 73 2. Materials and methods 74 2.1 Raw Materials 75 The iron concentrate utilized in the pelletizing process is sourced from the actual production 76 materials of an iron and steel enterprise located in Guangxi, China. Its chemical element composition
Stability of bentonite colloid carried with kaolin-supported …
A t /A 0 evolution with time under different K-nZVI dosage: (a) 0 % Bentonite；(b) 1 % Bentonite； (c) 3 % Bentonite； (d) 5 % Bentonite；(e) 7 % Bentonite. The law as shown in Fig. 2 is that the relative absorbance of suspension decreased first and then stabilized with time, which was particularly obvious at low …
Insights into Determination of Gas Breakthrough in …
In this study, to investigate gas breakthrough properties, step-by-step (SBS), residual capillary pressure, and mercury intrusion porosimetry tests were conducted on saturated Gaomiazoi (GMZ) bentonite specimens. Results show that, compared with the other two methods, only SBS tests can accurately measure the gas breakthrough …
Determination of SLES in Personal Care Products by Colloid …
Both the methods for endpoint determination produce rectilinear dependencies between the SLES content and titrant amount (Figure 5). However, method B results in higher values of the coefficient of determination, R 2. As a matter of fact, method B provides the value R 2 > 0.9985 (Figure 5). In other words, the deviation of …
Colloidal stability of bentonite clay considering surface …
DOI: 10.1016/J.JIEC.2010.05.002 Corpus ID: 98216135; Colloidal stability of bentonite clay considering surface charge properties as a function of pH and ionic strength @article{Baik2010ColloidalSO, title={Colloidal stability of bentonite clay considering surface charge properties as a function of pH and ionic strength}, author={Min Hoon …
The colloidal and rheological properties of bentonite suspensions
The analogous symmetry and dimensions in the tetrahedral and octahedral sheets allow the sharing of oxygen atoms between the sheets. In the case of the `three-layer minerals' or smectite clay minerals, one alumina or magnesia sheet shares oxygen atoms with two silica sheets, one on each side. The combination of an octahedral sheet …
Kinetic determination of sedimentation for GMZ bentonite …
DOI: 10.1016/j.clay.2019.105393 Corpus ID: 212983154; Kinetic determination of sedimentation for GMZ bentonite colloids in aqueous solution: Effect of pH, temperature and electrolyte concentration
Determination of the Degree of Sodic Modification of …
almost all calcium bentonite clay needs to undergo sodium modification.17) However, achieving efficient sodium modi-fication of bentonite has long been a challenging issue for researchers in this field. In addition to exploring various methods and processes for sodium modification, scholars have also sought new insights by investigating the ...
Size distribution analysis of colloid generated from …
These all showed that groundwater of low ionic strength (~ 1 mM) and slightly alkaline nature favored the generation of bentonite colloids. For colloid generation behaviors on FEBEX and MX80 ...
Size characterization of bentonite colloids by different …
Colloids. Bentonite. The size and shape of colloids released from a natural bentonite into a low-mineralized groundwater are investigated using various colloid …
Colloid Diffusion in Compacted Bentonite: Microstructural Constraints
In Sweden and in many other countries, a bentonite barrier will be used in the repository for spent nuclear fuel. In the event of canister failure, colloidal diffusion is a potential, but scarcely studied mechanism of radionuclide migration through the bentonite barrier. Column and in situ experiments are vital in understanding colloid diffusion and …