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. ... Urban wastewater treatment by adsorption of organic matters on modified bentonite by (iron-aluminum) J. Encapsulation Adsorpt. Sci., 4 (3 ...
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.
The sodium salt-assisted low temperature activation of bentonite (BB) was attempted. The unique features of the raw bentonite and BB were characterized with respect to the morphological ...
Activated Bentonite clay examined by multiple characterization techniques showed good structural properties. Applied as a catalyst in esterification reaction show good …
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 ...
After the acid activation, the analysis data showed a significant change in the chemical composition in modified bentonite clay, compared to the raw bentonite clay. The acid activation of bentonite caused an increase in the amount of Si +4 and Ti +4; this increase could be attributed to the remobilization of cations in the octahedral or ...
A method for activation of bentonites is described. The method comprises a prior treatment of the bentonite with an organic polymer and/or an aqueous alkaline solution as known from prior art. Subsequently, an amount of 0.01 - 10% by weight from the treated bentonite of a heavy metal salt is incorporated into the pretreated bentonite and then dried at a temperature not higher than …
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 ...
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 ...
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 removal of organic (e.g., dyes, microplastics, phenolic organic contaminants and other organics) and inorganic …
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 ...
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 bentonite ...
A new process for manufacturing organically compounded bentonite was developed successfully based on the organic intercalation and layered structure of bentonite. …
A natural clay was purified (P-C) and modified by three methods: thermal activation at 200°C for 2 h, acid activation with a 3N sulfuric acid solution for 1 h, and saline activation with ...
Acid activation technique was opted for modifying natural bentonite (NB) to enhance the adsorptive removal of CIP from water. The BET surface area analysis revealed that acid …
Bentonite activation was performed with three different concentration of H 2 SO 4 (3, 5, and 10 N), in order to investigate the impact of acid concentration on the surface area. Compared with natural bentonite, acid-activated bentonite displayed about 38–51% larger surface area (Table 1 ).
The microwave activation method of bentonite has faster reaction rate and better modication eect. The combination of microwave activation and other bentonite activation technologies will signicantly improve the activation eciency. The interlayer spacing of organic bentonite generally increases with the increase of modier concentra-
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 …
Volcanic Materials in Commerce and Industry. Jonathan Dehn, Stephen R. McNutt, in The Encyclopedia of Volcanoes (Second Edition), 2015. 5.1 Bentonite. Bentonite is an off-white montmorillonite clay formed from altered volcanic ash. It has a sheet-silicate structure and is especially notable for the way in which it absorbs and loses water and for its base-exchange …
Organic bentonite is usually made by inserting an organic covering agent into sodium bentonite by ion exchange technology. According to the proportion of ion displacement in the montmorillonite structural unit layer, the commercial bentonites in this study are labeled as B-Na (sodium bentonite), OB-H (high organic ammonium content), and OB-L ...
Activation of Bentonite and Application for Reduction pH, Color, Organic Substance, and Iron (Fe) in the Peat Water. Muhammad Naswir. ... (65.60%), organic matter (59.1%), and 35.89% Fe. The ability to absorb organic bentonite, Fe and peat water color due to the nature of fluid power strong, and expands when mixed with water and can adsorb ...
Surface activation of fuller's earth (bentonite clay) using organic acids. January 2015; Authors: ... Keywords bentonite, characterization, acid-activation, bleaching capacity, Xiazijie.
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. ...
With the fully-activated BENTONE® P organoclay pastes, the need for this type of activation is eliminated. Using a special process carried out by Elementis, the clays in the products are …
The main goal of this research is to increase the adsorption capacity of bentonite clay by modifying its properties by treatment with organic acid. Activation of bentonite clay in …
Bentonite Activation (Activation) Bentonite as much as 5 kg dried with hot sun, then roasted at a temperature of 110oC, then cooled in crushed into powder with a size of 150 mess. ... The ability to absorb organic bentonite, Fe and colors on the water because of the nature of the peat due to the strong colloid, and expands when mixed with water ...
One application of calcium bentonite with a significant market is the decolourization of vegetable, animal and mineral oils. Most of the calcium bentonite used for filtering and decolourizing oils is acid activated (Odom, 1984).Acid treatment with sulphuric or hydrochloric acid removes the calcium cations from the surfaces and edges of the layers, which increases …
Handbook of Clay Science. P. Komadel, J. Madejová, in Developments in Clay Science, 2013 Abstract. Acid activation is a common chemical modification of clays, usually bentonites, with a hot solution of a mineral acid (typically HCl or H 2 SO 4), and it is used for both scientific and industrial purposes.The aim is to obtain partly dissolved material of increased specific surface …
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 ...
We aimed to investigate the effectiveness of activated bentonite in OMWW treatment. Batch and column techniques were applied. Crude and treated OMWW samples were characterized; physiochemical parameters, total …
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