The hydrochloric acid (HCl, 36.0–38.0%) used for activating bentonite was acquired from Sinopharm Chemical Reagent Co., Ltd. 2.2 Preparation of the catalyst. The overall synthesis procedure of the catalyst is shown in Fig. 2 and illustrated in detail as follows. The experimental procedure involved dispersing the bentonite samples from …
A preparation process of the bentonite desiccant includes (1), mixing bamboo charcoal, sodium chloride, bentonite and quartz sand, adding water and then stirring uniformly to obtain a mixture; (2), adding hollow micro-beads to the mixture obtained in the step (1) and blending uniformly to obtain a mixture; (3), mixing fibers with iron powder ...
A simple physical method composed of grinding, dispersion and centrifugation was adopted to purify a low-grade bentonite from Zhejiang, China. This experiment …
In this study, the preparation of tungsten slag-bentonite particle adsorbent was studied using orthogonal and static adsorption tests. The adsorbent was characterized, and its adsorption performance for heavy metal lead ions was clarified. ... The adsorption process conforms to the pseudo-second-order kinetic equation, and its adsorption ...
Preparation process of polymer-amended bentonite There are two commonly used processes: wet process and dry process. In the wet process, bentonite and polymer solutions are mixed and stirred, and then the mixtures are dried and ground after adequately reacted.
Although compacted bentonite is planned to be used in the real repository, the study used dispersed bentonite slurry to better control for experimental variables to study the fundamental sorption dynamics. The experimental procedures developed in the laboratory setup are briefly discussed below. 2.1 Stock Solution Preparation
The invention discloses an alkaline calcium bentonite and making method, which comprises the following steps: adapting active carclazyte and calcium oxide as raw material; mixing the raw material evenly; reacting the calcium oxide and water to produce calcium hydroxide; diffusing the calcium hydroxide in the active carclazyte layers; reacting one of …
A process for upgrading a crude bentonite ore such that it can be used advantageously to prepare unusually high aqueous solution viscosities. This sequence comprises initially subjecting the crude ore to a working or shearing stage, followed by a drying step to about a 5 % moisture level. Na2CO3 is then dry-blended with the material, and the sequence is …
The ball milling process is the most common process for manufacturing nano bentonite, but it takes a long time and has the disadvantage of separating samples after the dispersion process [26]. The ultrasonic manufacturing method is a process in which nanoparticles can be produced by applying a temperature of 5000 °C and …
The process of modifying bentonite with a cationic surfactant (hexadecyltrimethylammonium bromide: CTAB) and silane coupling agent (Hexadecyltrimethoxysilane: HDTMS) is as follows: the intercalation of bentonite by CTAB increases the basal spacing of bentonite, and the thermal stability of bentonite is …
Different nanocomposites silica-resin based were prepared and characterized in order to achieve a porous monolith that contains bentonite and allows the flow of aqueous systems. The bentonite used …
The preparation process of different organic ammonium modified bentonite samples is as follows. Disperse 5.00 g Ca-Bent (or Na-Bent) in 200 mL Millipore water and vigorously stir at 85 °C for 2 h to fully disperse the bentonite and obtain the bentonite slurry.
Bentonite with about 20%–30% montmorillonite is a purified product of Minh Ha Bentonite Mineral Company (Vietnam). 2.2 Preparation of IPN hydrogel adsorbent (CAB/CGA) CAB/CGA prepared in a two-steps process. The first step: Synthesis of semi-IPN hydrogel of CAB and CTS.
Abstract. Bentonite clay is one of the oldest clays that humankind has been using from ancient times as traditional habits and remedies. In recent years researchers have found many applications of ...
This indicates that the semi-dry process makes bentonite have stronger polarity, and hence can provide more sites for the adsorption of methylene blue cations (Santamarina et al., ... Preparation of sodium-type bentonite with useful swelling property by a mechanochemical reaction from a weathered bentonite. Appl. Clay Sci., 175 …
The preparation of solid acid catalyst from bentonite-based was prepared successfully by the modified pillarization method using the sonication process. Several characterization results showed an increase in physicochemical properties compared to raw bentonite or even conventional pillarization bentonite.
Process flow diagram for bentonite processing (EPA, 2005) Slika 1. ... Beneficiation Pretreatment and Chemical Activation Method For Preparation and Characterization of Nano Structure Bentonite
Pelletizing feed preparation and mixing: the raw material (iron ore concentrate, additives—anthracite, dolomite—and binders are prepared in terms of particle size and chemical specifications, dosed, and mixed together to feed the pelletizing process; ... Organic binders have been used as an attractive alternative to bentonite in iron ore ...
The different chemical treatment such as NaCl, Na 2 CO 3, (Na (PO 3)) 6 and NaOH etc. before purification by sedimentation process can alter the swelling of bentonite differently and thus the level of purity, size of the particle and the porous structure of bentonite. However, a comparative study of the chemically modified …
Bentonite production process and equipment. February.23,2022. Bentonite is a water-containing clay mineral dominated by montmorillonite, with a hardness of 1 to 2 and a density of 2 to 3 g/cm³. It is a soft non-metallic mineral, also called bentonite, bentonite or bentonite. According to the properties of bentonite, the equipment used in the ...
The experimental preparation process is depicted in Fig. 3. 15 g of bentonite and 150 mL of deionized water are combined in a magnetic stirrer and heated to 70 °C, then stirred for 1 h to create a bentonite suspension. The required amount of alkyl …
Preparation and tribological properties of attapulgite – bentonite clay base grease - Author: Tiedan Chen, Yanqiu Xia, Zhilu Liu, Zeyun Wang – The mixture of attapulgite and bentonite was used as a thickener, and polyalphaolefin was used as the base oil to prepare the new lubricating grease. Some solid particles such as ...
Download scientific diagram | Preparation process of bentonite sample from publication: Gas migration properties through saturated bentonite considering the interface effect | The breakthrough of ...
Geopolymeric solidification is an effective process for treating engineering waste slurry, yet its efficacy varies with source of slurry. This study examined four shield tunneling spoil types for geopolymeric solidification. The unconfined compressive strength of the best sample was 17–126% higher than the least effective one. A significant …
Preparation of Bentonite-Based Hybrid Gel. First, a bentonite suspension was prepared by dispersing the bentonite into the water, and then, the dispersion was stirred well to ensure that the bentonite particles were uniformly dispersed in the solution. ... During this process, the temperature was continuously recorded, while gas samples at the ...
Different nanocomposites silica-resin based were prepared and characterized in order to achieve a porous monolith that contains bentonite and allows the flow of aqueous systems. The bentonite used to prepare the nanocomposites was a good adsorbent for various molecules in aqueous media in stirred tank reactor. But the …
Preparation of Bentonite-Based Hybrid Gel. First, a bentonite suspension was prepared by dispersing the bentonite into the water, and then, the dispersion was stirred well to ensure that the bentonite particles were uniformly dispersed in the solution. ... During this process, the temperature was continuously recorded, while gas samples …
The preparation process of different organic ammonium modified bentonite samples is as follows. Disperse 5.00 g Ca-Bent (or Na-Bent) in 200 mL Millipore water and vigorously …
Novel multifunctional adsorbent bentonite–steel slag composite particles (BSC) were developed for highly efficient and synergistic treatment of heavy metal ions in acid mine drainage (AMD). Single-factor experiments were performed to examine the influence of different parameters on the adsorption effect, alkalinity release quantity, and loss rate of …
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