Effect of Surfactants on the Performance of Water-Based
The effect of surfactants on the flow behavior of sodium bentonite dispersions (2 wt%) was studied for a cationic (cetylpyridinium chloride, CPC1) and an anionic surfactant (sodium dodecylsulfate, SDS) by Permien and Lagaly . Cationic and anionic surfactants affected the rheological behavior of sodium bentonite suspensions by several mechanisms.
Experimental study on sodium modification and purification of GMZ bentonite
The sodium modification of bentonite is an exchange process between Na + and Ca 2+ using the ion exchange properties of bentonite [14], [15].The methods of sodium modification can be divided into extrusion, stacking, rolling and suspension [16].Purification is the process of removing the accessory minerals from bentonite [17], and can be divided into …
Regeneration Feasibility of Bentonite by Sodium Persulfate
Hence, this study investigated the ability of sodium persulfate (Na2S2O8) (SPS) to regenerate bentonite loaded with . The modification of raw bentonite with SPS was also investigated.
Evaluation and prediction of swelling properties of bentonite …
The primary reason for this phenomenon can be attributed to the cation exchange reaction taking place within the salt solution, which in turn leads to an increase in osmotic …
Effect of Modified Hydroxyapatite Nanoparticles on Sodium …
Drilling in high-temperature wells may worsen the flocculation of water-based bentonite suspension (BN-WBM), particularly when common drilling fluid contaminants like calcium cation (Ca2+) and sodium cation (Na+) are present. High concentrations of these cations can adversely affect drilling fluid rheology, filtration, and density. This can result in poor well …
Prediction of swelling characteristics of compacted GMZ …
thereby affect the swelling properties of the buffer/ backfill material. The effect of saline groundwater on the swelling characteristics of bentonite is expressed mainly in two aspects. First of all, the salinity of groundwater has a strong inhibitory effect on swelling potential (Villar 2006; Siddiqua et al. 2011). This relationship can be ...
Preparation of composites and nanocomposites based on bentonite …
A series of composite and nanocomposite hydrogels were synthesized by copolymerization reaction of partially neutralized acrylic acid (SA) on bentonite micropowder (BT) using N,N ...
The alkaline reaction of FEBEX bentonite: a contribution …
The alkaline reaction of FEBEX bentonite: a contribution to the study of the performance of bentonite/concrete engineered barrier systems La reacción alcalina de la bentonita FEBEX: una ...
Effect of Different Additives on Properties of Sodium …
Shrinkage limit and consolidation were done on sodium bentonite sand mixture and treated sodium bentonite and the following conclusions were obta. ined. Liquid limit decreases and UCC increases for bentonite treated with both . CaCl. 2 . and MgCl. 2 . This may be . due to the decrease in diffused double layer effect of clayey soil
Dietary Supplementation with sodium bentonite and coumarin alleviates
The effect of supplementation of sodium bentonite and coumarin on the growth performance of rabbits is presented in Table 2. Supplementing the sodium bentonite and coumarin to aflatoxin containing diet improved (P < 0.001) the body weight (BW), average daily gain (ADG), feed intake (FI) and feed conversion ratio (FCR) compared to aflatoxin diet ...
Effect of Bentonite Content and Hydration Time on …
The bentonite is commonly used mixed with soils for groundwater retention and waste contaminant facilities. The incorporation of bentonite could significantly reduce hydraulic conductivity. In this study, the effects of bentonite content, hydration time and effective confining pressure on the static properties of a sand–bentonite mixture were studied using experimental …
Utilization of Bentonite in Concrete: A Review
The investigations began in Pakistan and were later expanded by several countries [7,8]. The use of bentonite in concrete was shown to have favourable benefits in terms of strength and durability ...
Laboratory investigation of the swelling pressure of bentonite …
The reaction between lime and silicate, aluminate constituents of expansive soils is complex and involves cation exchange, flocculation and agglomeration, pozzolanic reaction, and carbonation.
affect the balance of sodium reaction of bentonite in Oman
Clay is closely associated with the drilling of oil and gas by influencing the shale wellbore stability and the rheology of drilling fluids. In this work, four imidazolium-based ionic liquids (ILs) were used to modify the typical clay (i.e., sodium bentonite (Na-Bent)), and their effects on the Na-Bent rheological and swelling properties were …
Effect of salt solution concentration and cation types on the
Understanding the effect of salt solution on the mechanical properties of bentonite is crucial for evaluating the performance of buffer and backfill barriers in deep geological …
A systematic and comprehensive study of Eco-friendly bentonite …
Bentonite is highly demanded because of its effective adsorption properties and effectiveness of cost. Mostly couple of bentonite clay exist; sodium bentonite (swelling type bentonite) and calcium bentonite (non-swelling type bentonite) (Kumar and Lingfa, 2019).Sodium Bentonite, an aluminium phyllosilicate developed from the volcanic ash conversion, especially …
Mechanism of geopolymeric solidification in shield …
The origins of ST spoil are diverse, encompassing various strata and techniques (such as earth pressure balance and slurry shield tunneling), leading to significant variations in its properties, particularly in the content of clay minerals (like bentonite) [20].These differences result in inconsistent geopolymeric solidification outcomes, which can greatly affect the performance …
A Study on the Effect of Chemicals on the Geotechnical …
the reaction with acetic acid and calcium chloride. Also the ... result indicated that calcium bentonite would be more resistant than sodium bentonite to chemical constituents in the permeating fluids. From there study percentage swell is seemed to be the most suitable independent variable for the ... effect of bentonite content by adding ...
The effect of bentonite feeding for young cattle on the …
Addition of sodium bentonite didn't affect (P>0.05) the feed intake, the energy and N balance. The feed intake differ (P<0.01) between restricted and ad libitum feeding (1.17 vs. 2.19kg d-1).
Full article: Study of the impact of bentonite on the physico
So as to analyze the effect of bentonite on the behavior of the grout, various tests such as X-ray diffraction (XRD), laser granulometry, and X-ray fluorescence spectrometry(XRF) of cement and bentonite have been investigated. ... There are several types of bentonites which are generally divided into sodium bentonite with a high swelling ...
Anion exclusion and sorption effect for compacted bentonite…
The bentonite is negatively charged. The electrostatic repulsive force between negative charge on the surface of bentonite and anion affects the diffusion of anion, which is called anion exclusion . Diffusion-reaction equation. The compacted and water-saturated bentonite is assumed to be a homogeneous and isotropic porous material.
The Affect of Salt Impacted Water on the Expansive …
• Use of sodium bentonite chips to seal of the borehole annulus in groundwater monitoring wells • Salt impacted water may retard the seal • Bentonite chips may not provide an adequate layer …
Effect of reductant sodium bentonite content and reaction temperature
In this study, sponge iron ore concentrate (scale) and reductant (coke coal dust and sodium bentonite) were mixed at certain proportions to produce composite pellet samples; the effects of addition rate of the reductant material of sodium bentonite (1 wt%–4 wt%) and variation in reaction temperature (900–1200 °C) on the metallization and ...
Chapter 5 Properties and Uses of Bentonite
The values show the relative impermeability of sodium bentonite and the great reduction in permeability of sands with the addition of only very small amounts of sodium …
Chemical and mineralogical reactions of bentonites in …
Many of the mineralogy-related reactions observed in bentonite barrier systems were summarized and discussed, highlighting long-term, large-scale and laboratory experiments.
(PDF) Effect of Bentonite Content and Hydration Time on …
The backfill consisted of lean clay (the base soil) combined with bentonite-water slurry containing 5–6% sodium bentonite, resulting in a total bentonite content of ~1%.
(PDF) Conditioning time and sodium bentonite affect pellet …
Agricultura, 2020. Clay is one of many other additives proposed as substitutes to optimize avian performances. This study was carried out to evaluate the effect of bentonite sodium (BS) from the Maghnia field on the zootechnical performances of the broiler chicken.
Effect of pH Variations on the Yield Stress of Calcium Bentonite …
Although sodium bentonite is widely used due to its superior engineering performance, natural deposits of calcium bentonite are globally more common than those of sodium bentonite [1,2]. Due to the calcium ion, calcium bentonites show relatively poor engineering performance compared to sodium bentonites [1,3,4,5,6,7].
Swelling deformation of Na-bentonite in solutions …
Investigation of the effect of salt solution on the swelling properties of compacted bentonite is of great importance for evaluation of the properties of behavior of engineering …
The Effect of Sodium Bentonite in the Thermo-Catalytic
The Effect of Sodium Bentonite in the Thermo-Catalytic Reduction of Viscosity of Heavy Oils Molecules. 2023 Mar 15;28(6):2651. doi: 10.3390/molecules28062651. Authors Zhichao Zhou 1 ... The components of the heavy oil before and after the reaction were fully characterized. Six model compounds were used to simulate the aquathermolysis reaction ...