Activation of calcium bentonite for use as a drilling fluid:
2024年6月1日 This study explores the activation of calcium bentonite through physical (ultrasonic) and chemical (carboxymethylcellulose and starch) methods. The bonding between
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One step acid activation of bentonite derived adsorbent for
2020年11月19日 Herein, the facile one step acid activation of bentonite derived functionalized adsorbent (AB) for the effective remediation of both ionic and non-ionic secondary pesticides,
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Activation of (Na, Ca)-bentonites with soda and MgO and
2010年4月1日 Activation of the bentonites was performed using the most popular (Na 2 CO 3) and also the most controversial additive (MgO) and their blends. Upgrading the (Na, Ca)
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One step acid activation of bentonite derived adsorbent for
2020年11月19日 在本文中，已经尝试了由膨润土衍生的官能化吸附剂（AB）的简便的一步酸活化，以有效地修复离子和非离子二次农药，苯丙胺和异丙甲草胺。 通过氮吸附-脱附分析，扫
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Activation of Jordanian Bentonite by
2018年3月12日 Jordanian bentonite was activated by hydrochloric acid at room temperature. FTIR, XRD, TGA, and BET surface area analyses of the samples were carried out to examine the structure of bentonite before and after acid
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Effect of the Acidic and Alkaline Activation of Bentonite
2022年3月6日 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
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Sodium salt-assisted low temperature activation of bentonite
2022年2月15日 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
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Characterization of activated bentonite clay mineral and the
2020年6月10日 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
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Surface properties of pillared acid-activated bentonite as
2013年1月1日 Seven diffraction lines around 2θ of 7°, 20°, 22°, 27°, 35°, 54° and 62° are observed in the XRD pattern of the parent bentonite. The lines at 2θ = 22° and 27° belongs to
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Activation of (Na, Ca)-bentonites with soda and MgO and
2010年4月1日 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. ... (dotted line) based on ...
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Activation of calcium bentonite for use as a drilling fluid:
2024年6月1日 This study explores the activation of calcium bentonite through physical (ultrasonic) and chemical (carboxymethylcellulose and starch) methods. The bonding between bentonite and polymers was analyzed, and X-ray diffraction characterized the effect of ultrasound. ... The rotor sleeve grew enormous until the mud touched its scribed line. The mud ...
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One step acid activation of bentonite derived adsorbent for
2020年11月19日 Herein, the facile one step acid activation of bentonite derived functionalized adsorbent (AB) for the effective remediation of both ionic and non-ionic secondary pesticides, ametryn and ...
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Preparation and Characterization of Acid-Activated Bentonite
2021年7月28日 The characteristics of acid-activated raw bentonite (RB) activated with binary acid solutions sulfuric acid + nitric acid, nitric acid + phosphoric acid, and phosphoric acid + sulfuric acid, at a concentration of 5 mol/L (denoted as 5-SN, 5-NP, and 5-PS), were evaluated. Moreover, its application for improving the electrical conductivity in tap water was
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Acid activation of bentonite clay for recycled automotive
purification has become a topic of research. In this study, the use of bentonite clay modified by acid activation is proposed. Sulfuric acid, acetic acid (v-acid/w-clay ratio=20, 40 and 60%) and sulfuric/acetic mixtures (1:1 ratio) were used in the bentonite clay activation. The activated clays were used in the UMO
learn moreOptimization of bleaching power by sulfuric acid activation of bentonite
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 earths (BEs).The roles of each of the process variables, namely mass fraction of H 2 SO 4 (x) in the dried CaB and pure H 2 SO 4 mixture, heating temperature (T) and contact time (t), in the activation were tested.
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Thermal activation, characterization and performance
2023年2月2日 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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IMPROVE THE CATALYTIC ACTIVITY OF FEOOH/BENTONITE
In our work, the activation of FeOOH/bentonite by mechanical activation was firstly investigated in detail, and then based on the XRD characterization of material, the mechanism for improvement of catalytic activity by mechanical activation was also discussed preliminarily. MATERIALS AND METHODS. Materials and chemical reagents
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Influencing of foundry bentonite mixtures by binder activation
Foundry; Bentonite; Green sand; Activation; Swelling volume; DC.Description.spa. Aunque en los últimos años se han desarrollado e introducido en la práctica de la fundición nuevos procesos de moldeo para la fabricación de piezas moldeadas de alta calidad, el moldeo en verde en mezcla de bentonita sigue siendo la tecnología más utilizada ...
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Characterization, Acid Activation and Bleaching
2006年4月27日 2.3 Preparation and analyses of acid activation bentonite Acid-activation bentonites were prepared (from the above raw bentonite) with sulfuric acid of 15%, 20%, 25%, 30%, 40% and 45% (by mass) stirring for 4h. The reaction temperature was controlled at 96
learn moreArticle Rehydration Driven Na Activation of Bentonite
2023年7月30日 Materials 2021, 14, 7622 3 of 14 Bent mixed with 2–5% Na2CO3 and various amounts of water (10–15% or excess), allowed to interact under shaking for 24 h, and dried at 60oC.
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Optimization of bleaching power by sulphuric acid
Keywords: acid activation, bentonite, bleaching, porosity, soybean oil . 2 *Corresponding author Dr. Müşerref Önal Department of Chemistry Faculty of Science, Ankara University
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(PDF) Thermal and Acid Activation (TAA) of
2018年8月1日 Bentonite from Iraq was the clay of choice for this study (Calcium base). The “State Company of Geological Survey and Mining” provided this rock, which was altered using Activation by Heat and ...
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A systematic and comprehensive study of Eco-friendly bentonite
2023年12月1日 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. This activation process is carried out in a ratio of 1:3 to ...
learn moreFrontiers Potential of Acid-Activated Bentonite and SO3H ...
Three different concentrations of H 2 SO 4 (i.e., 3, 5, and 10 N) were used for the activation of 50 g bentonite. The treatment was conducted in a water bath (95–98°C, atmospheric pressure) and 250 ml H 2 SO 4 was slowly added while the mixture was agitated at 400 rpm using a magnetic stirrer. After 2 h, samples were washed (i.e., pH 7) with ...
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Activation of Iraqi Bentonite Powder with H2SO4 and its
2018年1月19日 work was to enhance the bleaching activity of Iraqi bentonite after activation by sulfuric acid. The study is also aims to discuss the variation of some of physicochemical properties of Iraqi bentonite after acid treatment. 2- Experimental 2-1 Materials . Bentonite (CaB) was obtained from the bed in the Al-anbar region in IraqIts basic. clay
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Influencing of foundry bentonite mixtures by binder activation
2016年8月4日 Higher utility properties of bentonite binders are achieved through their activation. This contribution is aimed at finding a suitable activating agent. A number of sodium salts and MgO based ...
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Obtaining adsorbents from acid and acid-thermal activation of bentonite ...
2020年7月16日 In the case of thermal activation, the calcination of bentonite at 100 or 200 °C affects the structure of the montmorillonite. The surface area of the BAT increased with the temperature increase up to 100 °C and then gradually decreased beyond 100 °C. Thermal activation under a high temperature can remove water molecules and other impurities.
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Sodium salt-assisted low temperature activation of bentonite
2022年2月15日 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, functional, and textural analysis. The adsorptive behaviour was evaluated by adopting methylene blue (MB) as the model pollutant via batch adsorption experiment.
learn moreACTIVATION AND PURIFICATION OF BENTONITE FOR
2020年5月27日 The bentonite activation was done at two different reflux times (1 and 3 hour), and three different acid concentrations (1 M, 2.5 M and 5 M). To assist the interpretation of results, the bentonite samples were also studied using XRF and XRD. Bleaching power of active bentonite was initially studied using adsorption of methylene blue for optimation,
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