Influence of acid activation on the NH3 …
In this study, the adsorption of NH 3 gas on a bentonite from Ünye (Turkey) in its natural state and after acid treatments, was investigated experimentally at 298 K and up to 100 kPa. Bentonite was …
Na Bentonite Acid Activation Process
Optimization of bleaching power by sulfuric acid …
Optimization of bleaching power by sulfuric acid activation of bentonite Hale Bayram1, ... clays that contain Na-smectite (Na-Sme) or Ca-smectite (Ca-Sme) as major clay minerals (Mache et al., 2015; ... temperature and contact time for the activation process, as well as the type and composition of the impurities in the vegetable oil (Christidis ...
Sodium salt-assisted low temperature activation of bentonite …
Acid treatment involves the penetration of protons into the interlayer of bentonite substituting the exchangeable cations of the clay minerals, and improve the …
Rheological Properties of Acid-Activated Bentonite …
The purpose of this study was to investigate the effects of solids concentration, salt concentration, and pH value on the shear rate, shear stress, and other flow parameters of acid-activated bentonite suspensions. Activated Na-bentonite was prepared using sulfuric acid.
Application of Acid Activated Bentonite for Efficient
This study analyzed the structural transformations and adsorption properties of Na-bentonite clay before and after chemical activation by sulfuric and hydrochloric …
Kinetic model for the isothermal activation of bentonite by sulfuric acid
Activation of bentonite by acid is an important step for adsorption of some impurities by active clay [6]. This is so-called "activation process". The activation of bentonite is carried out in a continuous stirred tank reactor at low temperatures between 70 and 120 °C in the presence of activation agents, mostly sulfuric acid [7].
Acid activated clays: Materials in continuous demand
The acid activation process affected the intercalated amount of C16TMA + cations in the resulting organoclays, and thus, the amount of PVP in the composite. The cation content decreased with extent of acid activation. ... Na-bentonite was acid-activated by either H 2 SO 4 at varying concentrations from 0.25 to 2.0 ...
Characterization of activated bentonite clay mineral and the …
Acid activation technique was opted for modifying natural bentonite (NB) to enhance the adsorptive removal of CIP from water. The BET surface area analysis …
Application of Acid Activated Bentonite for Efficient
This study analyzed the structural transformations and adsorption properties of Na-bentonite clay before and after chemical activation by sulfuric and hydrochloric acids. The untreated and treated clay samples have been used for adsorption of organic matter from high strength phosphoric acid.
(PDF) Analysis of bentonite specific surface area by kinetic …
The most commercial used process for producing Na-bentonite with high specific surface area is activation by sodium carbonate in industrial scale. The theoretical formula for montmorillonite is Nay+ nH2O(Al2yMgy)Si4O10 that is classified as dioctahedral clays, ⇑ Corresponding author.
Activated Bentonite Nanocomposite for the Synthesis of …
Activated bentonites are low-cost acid catalysts used in several reactions. However, their application at an industrial scale is affected by the formation of colloidal suspensions when these bentonites are in aqueous solutions. In order to overcome these limitations, this work proposes obtaining a catalyst based on a composite containing …
Synergistic modification of bentonite by acid activation …
In this paper, we proposed a facile modification strategy to enhance adsorption performance of bentonite utilizing synergistic acid activation and hydroxyl iron pillaring, by which the adsorbent (abbreviated as S-Fe-BT) exhibited the highest adsorption capacity (246.06 mg/g) and a high rapid adsorption rate for a typical organic dye, Rhodamine ...
Effect of the Acidic and Alkaline Activation of Bentonite
Abstract A study is performed of the effect the means of activation of bentonite-like clays (acidic, alkaline, combined) have on the adsorption characteristics of Fe3+ ions under static conditions. The mechanism of the acidic and alkaline activation of montmorillonite is identified and found to depend on the concentration of the activating …
The effect of acid activation on some physicochemical
It was shown that activation by acid obtained at a constant temperature and constant period of time provides the possibility to obtain samples of bentonite of searched porosity only by changing ...
A systematic and comprehensive study of Eco-friendly bentonite …
The activation of bentonite results in an increase in the number of active sites, increase the pore volume, increase the surface area, etc. The major process of activation is thermal and acid activation. The acid activation is mostly carried out by sulphuric acid or hydrochloric acid.
Comparative study for removal of phosphorus from aqueous …
Na-bentonite proved to be more efficient in removing target material than natural bentonite. ... One step acid activation of bentonite derived adsorbent for the effective remediation of the new ...
Effect of acid activation on structural and bleaching properties of …
Request PDF | Effect of acid activation on structural and bleaching properties of a bentonite | A natural bentonite obtained from Khorasan, Iran, was submitted to acid activation with sulphuric acid.
Activating natural bentonite as a cost-effective
A new approach to acid activation of raw Ca-bentonite was explored. The method consisted in dehydration of clay by thermal pretreatment at 200 °C, followed by …
Bentonite
Compared to Na +-bentonite, acid-activated bentonite greatly improved the sludge settling characteristics. ... The considered radial process in the bentonite annulus is a complicated one with coupled, highly nonlinear flows that involve many things. ... Since the natural deposits requires very few operations and time for activation, so ...
(PDF) Activation of Bentonite Clay with H2SO4 and Study …
Due to ion exchange, the original (Ca, Mg, Na, K)-bentonite was converted to H-bentonite by H2SO4. ... onto bentonite when activation with H 2 SO 4 acid should have different abilities to replace ...
One step acid activation of bentonite derived adsorbent for …
Herein, the facile one step acid activation of bentonite derived functionalized adsorbent (AB) for the effective remediation of both ionic and non-ionic …
Optimization of bleaching power by sulfuric acid activation …
Acid activation was carried out by heating muds prepared from Ca-rich bentonite (CaB), sulfuric acid (H 2 SO 4) and distilled water, yielding various bleaching …
Chapter 7.1 Acid Activation of Clay Minerals
Bentonite has always had a multitude of markets and acid-activated bentonite was a traditional product for many decades. ... Acid activation of a Ca 2+-montmorillonite by treatment with sulphuric-acid solutions and subsequent ... Measurements of heats of adsorption of ammonia were carried out with a K10 catalyst in …
Acid Activation
In relation to acid activation and thermal treatment, the pillaring of clay minerals (Chapter 10.5) is a recent method of modification. ... Na-A, and tetragonal Pt phillipsite) varied with the thermal activation of kaolinite samples. ... Bentonite; Advanced Oxidation Process; Biochar; Montmorillonite; Nanocomposite; View all Topics. Recommended ...
Sodium-modification of Ca-based bentonite via semidry process
In order to improve the quality of Hunyuan inferior Ca-based bentonite (Ca-Bent), semidry process was used to modify Ca-Bent into superior Na-based bentonite (Na-Bent). The factors affecting sodium-modification were investigated. The optimized experimental parameters are obtained as follows: Na2CO3 dosage 4.0%, ageing time …
Adsorption of sodium from saline water with natural and acid …
Sodium ions removal performance of the bentonite activated at various acid concentration and activation time is shown in Fig. 6. Sodium removal from aqueous solution increases as bentonite activation acid increases from 1 M to 3 M and reduced for 4 M bentonite activation.
Effectiveness of Hydrochloric Acid Activated Bentonite in …
The results of the analysis showed that the acid activation process did not change the basal spacing d001 on the bentonite diffractogram. ... the Na Cl crystal product was ... HIGHLIGHTS Acid ...
Activating natural bentonite as a cost-effective
This study reported here was directed towards identifying a cost-effective activation protocol for enhancing the adsorption capacity of Australian bentonite for removal of toxic contaminants in wastewater. We investigated three protocols including thermal activation (TA), acid activation (AA), and combined acid and thermal …
A systematic and comprehensive study of Eco-friendly …
The major process of activation is thermal and acid activation. The acid activation is mostly carried out by sulphuric acid or hydrochloric acid. This activation …
Effect of Hydrochloric Acid on the Structural of Sodic …
In this work, Algerian Na-bentonite has been activated with hydrochloric acid at room temperature for 24 ... activation process repeated with varying acid concentrations of 0.05 - 0.6 M of HCl. ...
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