Organic Bentonite Activation
A comprehensive review on recent developments in …
Co 2 + ion adsorption into Saudi activated bentonite was well represented to by the pseudo-second-order kinetic model with R 2 was ~ ... [151], reported that Organic-pillared …
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Application of Acid Activated Bentonite for Efficient Removal …
Egyptian bentonite was crushed, grinded by a ball mill, purified using magnetic separation, treated with 0.1N acetic acid, and finally activated by Acid activation (HCl, H2SO4) and alkali ...
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Thermal activation, characterization and performance …
The effects of activation parameters (time and temperature) on its physiochemical properties and its performance for the removal of sodium ions from water were investigated. Bentonite activated for 6 h at 300 °C showed a maximum specific surface area of 81.74 m 2 /g while the raw one showed 57.6 m 2 /g. However, the cation exchange capacity ...
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Recent advances of application of bentonite-based …
In this review, we firstly summarized the modification of bentonite-based composites using various methods such as acid/alkaline washing, thermal treating and hybrids (e.g., polymer, clay mineral, magnetic and other modification); Then the recent advances of …
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Adsorption of heavy metals on bentonite and modified bentonite …
IUPAC isotherm of N 2 at -196 o C onto the before and after activation for bentonite clay. ... biological, organic, and inorganic contaminants from drinking water. Advances in Materials .
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Effect of organic binders on the activation and …
In the ironmaking process, the addition of an organic binder to replace a portion of bentonite has the potential to improve the performance of pellets. The interaction between original bentonite (OB) and organic binder …
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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 ...
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SURFACE ACTIVATION OF FULLER'S EARTH (BENTONITE CLAY) USING ORGANIC
Specific properties of bentonite clay have made them a valuable material in different process industries. Easy availability, low price and their effectiveness are the major factors which made fuller's earth, an adsorbent in cooking oil manufacturing industry. Textural characteristics of fuller's earth play an important role in its performance. These characteristics can be modified by …
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Co-modification of Bentonite by CTAB and Silane and its
The stability, dispersion, and rheological properties of clay suspensions are important in the process of drilling. Organic clays were obtained traditionally by cation exchange, which is thermally unstable due to weak electrostatic interaction between the cationic surfactant and clay minerals. The purpose of the present study was to yield a stable and well dispersed …
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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. ... surface of smectites can be rendered hydrophobic by exchanging the naturally occurring inorganic cations with organic cations. Acid activation of tetralkylammonium-exchanged smectites produces hybrid catalysts for the ...
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Acid Activation of Bentonites and Polymer-Clay …
Abstract. Modified bentonites are of widespread technological importance. Common modifications include acid activation and organic treatment. Acid activation has been used …
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Structural Property Improvements of Bentonite with Sulfuric …
The acid activation of bentonite from Middle Anatolia, consisting of mostly montmorillonite, with a hot solution of H 2 SO 4 with different concentrations was carried out. SEM images, nitrogen sorption isotherms and FTIR spectra were used to examine structural changes of the bentonite with acid activation. Acid–base titration method was applied to determine surface acidities. …
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Graphene oxide-modified organic Gaomiaozi bentonite for …
Then, 2 g APTES-GMZ bentonite and 5 mL GO solution (10 mg/mL) reacted and was stirred for 12 h under the activation condition of NHS/EDC. In the reaction process, as demonstrated in Fig. 3, under the action of NHS/EDC activation, the amino group in APTE-GMZ bentonite reacts with the carboxyl group in GO solution, forming amide bond, resulting ...
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Synthesis, characterization and application of organoclays for
Modified bentonite (B-BTB, B-DSS, B-BTC and B-BEHA) were synthesized via modification regent by dispersing the 1 g of bentonite (BT) in 50 mL of water through sonication (for the dispersion of ...
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Bleaching of Vegetable Oil using Organic Acid …
is to give the alternative method for activation procedure of bentonite clay and this method should be the safest method for both the labor and equipment used in vegetable oil industry. Keywords: bentonite clay; surface activation; organic acids; adsorption; fourier transform infrared spectroscopy (ft-ir). GJRE-C Classification : FOR Code: 030599
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A self-growing "Polysulfide-Phobic" interface
In this work, the limited gelation of organic bentonite (OB) in the electrolyte is utilized to construct an in-situ gel-type physical barrier. ... During the initial discharge activation stage, the gel layer gradually evolves into a "Polysulfide-Phobic" repulsive layer by trapping free Lithium-polysulfides (LiPSs). Due to the strong repulsion ...
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Organic Bentonite Rheological Additive
Organic bentonite is used to increase viscosity and gel strengths in diesel or mineral oil base systems. Modified bentonite is an attractive alternative to conventional bentonite clay gallants that required higher shear and chemical activation for optimal dispersion and performance.. Modified bentonite can be added at the mud plant when building new mud, or can be added …
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Comparative study for removal of phosphorus from aqueous …
The novelty of the current article is to investigate the adsorption potential of the Egyptian natural and activated bentonite (Na-bentonite) to inorganic and organic phosphorus (IP, OP) in aqueous ...
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Synthesis, characterization and properties of organically …
bentonite(rollgrinding + negrinding),bentonite + organic binderY(negrinding)andbentonite + organicbinderY (rollgrinding + negrinding)were1.512,1.284,1.535and
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Synergistic modification of bentonite by acid activation and …
For example, Javed et al. (2018) prepared activated bentonite using different organic and inorganic acids and conducted batch experiments to investigate its adsorption …
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Effect of organic binders on the activation and …
Effect of organic binders on the activation and properties of indurated magnetite pellets Cui Wang1), Chen-yang Xu2) ... bentonite and organic binder concentrations used in the actu-al pelletization experiments. The suspensions of bentonite and composite organic binder were dried for 48 h in an oven at 75°C. Table 1. ...
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A comprehensive review on recent developments in bentonite …
In order to increase adsorption capability for Na-bentonite rather than Ca-bentonite origin, nano-bentonite sample with Na activation was used by the author. Also for investigation of environmental effect, ... [151], reported that Organic-pillared bentonite (OPBent) was produced by modification of sodium bentonite with aluminum polyoxy and ...
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(PDF) Activation of Bentonite Clay with H2SO4 and Study …
Bentonite from Kirkuk city region (Iraq) was activated with H2SO4 at various ratios (5, 10, 15, 20 %). Due to ion exchange, the original (Ca, Mg, Na, K)-bentonite was converted to H-bentonite by ...
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Bleaching of Vegetable Oil using Organic Acid Activated …
19 research work is to give the alternative method for activation procedure of bentonite clay and 20 this method should be the safest method for both the labor and equipment used in vegetable 21 oil industry. 22 23 Index terms— bentonite clay; surface activation; organic acids; adsorption; fourier transform infrared 24 spectroscopy (ft-ir).
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The effect of oxalic acid activation on the bleaching …
Optimum bleaching properties could be achieved using a variety of combinations of acid to bentonite ratios and activation times. Bleaching efficiency tests indicated that 24 h activation at 100°C with 1m oxalic acid and 25% pulp density (w/v) gave results equivalent to that of a commercial bleaching earth (Tonsil Optimum 210 FF).
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Organic activation and Characterization of Calcium Type Bentonite
The requirements for drilling bentonites are tightening due to ever-increasing demands for petroleum resources, coupled with cost and reaction technology constraints.
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TGA curves of raw and acid activated Jordanian bentonite.
The bentonite-based adsorbents were then used to evaluate the removal efficiency of an organic molecule, the azo dye Orange G (OG), as a model for a Persistent Organic Pollutant.
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Activating natural bentonite as a cost-effective adsorbent …
The bentonite is a widely available and abundant natural mineral, and can be a low cost adsorbent for water and wastewater treatment.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 …
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Obtaining adsorbents from acid and acid-thermal activation of bentonite
The second step included two successive operations: bentonite activation by sulfuric acid attack was followed by thermal treatment at two temperatures, 100 and 200 °C. The effect of the experimental conditions on the behavior of adsorption was studied. ... and volatile organic compounds attached on the surface of the raw bentonite, ...
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Activation of (Na, Ca)-bentonites with soda and MgO and …
The optimum moisture of the bentonite samples for soda activation was found to be 40% in our preliminary activation studies on viscosity, swelling, and filtration loss. In soda activation, soda ash powder was added to the initially moisturized bentonite samples and kneaded till all the bentonite had reacted with soda.
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