(PDF) Thermal and Acid Activation (TAA) of Bentonite as …
ResultNatural bentonite grounded from Sarolangun District of Jambi Province has been modified based on Thermal and Acid Activation (TAA). The thermal activation was conducted by calcination at ...
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A systematic and comprehensive study of Eco-friendly bentonite …
ResultVijayakumar et al. (2009) evaluated acid-activated bentonite as a catalyst in the esterification reaction of the different carboxylic acid with alcohols or p-cresol. Acid activation of bentonite was carried out in concentrated H 2 SO 4 and characterized by FTIR, XRD, SEM, TGA, acid titration and BET surface area. …
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Characterization of Acid Activation of Bentonite Clay of …
Result2.2 Activation of bentonite clay Activation was done based study of Samira & Moussa, 2014; 400 mL of hydrochloric acid (2M HCl) (98%, d = 1.98 g/cm3) solution was added to 50 g of NB sample. The ...
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Modeling and optimization process parameters of acid activation …
ResultThe effect of acid activation on the textural properties of a bentonite from Serbia was investigated using response surface methodology. The influence of activation parameters (temperature, time, acid normality, solid-to-liquid ratio and stirring rate) on the specific surface area, pore volume, pore diameter and bulk …
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Sodium salt-assisted low temperature activation of bentonite …
ResultOne step acid activation of bentonite derived adsorbent for the effective remediation of the new generation of industrial pesticides. Sci. Rep. 10, 1–13 (2020).
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Effect of Hydrochloric Acid on the Structural of …
ResultThe sulfuric acid activated bentonites exhibiting a lower cation exchange capacity (CEC) and а change of specific surface area (S BET) from 6 to 387 for bentonite from Petrovac and from …
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Acid Activation and Its Characterisation of Gulbarga City Bentonite
ResultInfrared Study. Table-2 gives the vibrational frequencies of raw clay and acids activated bentonite clay. The care full observation of the table, all these sample shows a broad peak at around 3000 cm-1 corresponds to water of adsorption and the peak at around 1000cm-1 to 1100 cm-1 is due to the presence of some …
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Characterization, Acid Activation and Bleaching Performance …
ResultThe acid activation bentonites were suitable for decol- orization of cottonseed oil through removing carotene and chlorophyll. The bleaching …
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One step acid activation of bentonite derived adsorbent for …
ResultAbstract. Herein, the facile one step acid activation of bentonite derived functionalized adsorbent (AB) for the effective remediation of both ionic …
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Frontiers | Potential of Acid-Activated Bentonite and SO3H
ResultCompared with natural bentonite, acid-activated bentonite displayed about 38–51% larger surface area (Table 1). It can be deduced from the BET data tabulated in Table 1, that the activation of bentonite with 5 N solution of H 2 SO 4 triggered the largest surface area. In another word, increasing acid concentration …
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Characterization, Acid Activation and Bleaching …
ResultChinese J. Chem. Eng., 14(2) 25358 (2006) Characterization, Acid Activation and Bleaching Performance of Bentonite from Xinjiang* WU Zhansheng(^ t)a, LI Chun(^#) a'c'**, SUN Xifang(^*^)a, XU DAI Bin(ft $)a, LI Jin'e(*&$)a and ZHAO Hongsheng *i * b 1 School of Chemistry and Chemical …
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Bentonite
ResultPostfermentation Treatments and Related Topics. Ronald S. Jackson PhD, in Wine Science (Third Edition), 2008 BENTONITE. Bentonite is a type of montmorillonite clay widely employed as a fining agent. It is used in clarifying juice and wines, in removing heat-unstable proteins, and in limiting the development of copper casse. …
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Structural Property Improvements of Bentonite with Sulfuric Acid …
ResultThe 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 …
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Effectiveness of Hydrochloric Acid Activated Bentonite in …
ResultThis study aims to synthesize modified bentonite using hydrochloric acid (HCl) solution and measure the metal content of NaCl, Pb, Ca, and Mg using AAS. The synthesis of activated bentonite was ...
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Acid activation of bentonite clay for recycled …
ResultIn 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 treatment in a ratio of 1:4 w/v, using batch adsorption …
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Obtaining adsorbents from acid and acid-thermal activation …
ResultThe adsorption follows a spontaneous, endothermic and physical adsorption. The study shows that acid activated bentonite or acid-thermal …
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Sulphuric Acid Activation of a Calcium Bentonite
ResultA calcium bentonite from Kütahya region (Turkey) was activated with Na2CO3 at various ratios (1, 2, 2.5, 5, 10, 15g / 100 g bentonite). Due to ion exchange, the original Ca-bentonite was ...
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Investigation of Chromium (III) Adsorption on Acid-Treated Bentonite
ResultThe mass percentage of HCl and H 2 SO 4 in the bentonite-acid mixture was adjusted to 40%. Bentonite samples were activated with different concentrations of hydrochloric acid (3.0, 5.0, and 7.0 M). The activation stage was performed in a water bath at 60 °C on a magnetically stirred hot plate under reflux …
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Optimization of bleaching power by sulfuric acid activation …
ResultAbstract. 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 …
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Modified Pacitan bentonite with acid and thermal activation …
ResultThe characterization obtained in this study proves that the presence of Ca-montmorillonite with the optimum condition in acid-activated bentonite can increase its capacity and be a promising adsorbent for wastewater treatment, especially for further study in radionuclides adsorption.
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The effect of oxalic acid activation on the bleaching …
ResultOptimum 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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Production of aromatic hydrocarbons from catalytic pyrolysis of …
ResultNatural bentonite clay (mainly sodium-rich montmorillonite) both purified and acid activated using HCl, H 2 SO 4, and H 3 PO 4 acids were applied to the catalytic fast pyrolysis (CFP) of lignin. The modifications in crystalline structure and acidity of the activated clay were investigated via XRD, N 2-adsorption …
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Influence of acid activation on the NH3-adsorption …
ResultIn 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 treated with HCl solutions of various concentrations (0.5–2.5 M) at 75°C for 4 h.
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Preparation and Characterization of Acid-Activated …
ResultThe characteristics of acid-activated raw bentonite (RB) activated with binary acid solutions sulfuric acid + nitric acid, nitric acid + phosphoric acid, and …
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Optimization of bleaching power by sulfuric acid activation of bentonite
ResultAcid 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 …
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Structural Property Improvements of Bentonite with Sulfuric …
ResultStable structured acid activated bentonite with 2 M was tested in catalytic wet peroxide oxidation (CWPO) of phenol together with raw bentonite. Around 96 % …
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Thermal activation, characterization and performance …
ResultThe 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. …
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Modification of bentonite by combination of reactions of …
ResultAcid activation followed by silylation markedly improves the cationic exchange. Abstract. Objective. The aim of this study is to analyze different …
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Modification of bentonite by combination of reactions of acid …
ResultThe FTIR spectra of the exchanged acid-activated bentonite (E–A-Bent) and the exchanged bentonite (E-Bent) are shown in Fig. 1, and compared with the natural bentonite (Bent). The E–A-Bent and E-Bent exhibit a new absorption peak at 1460 cm − 1 due to the C C asymmetric bending of the alkyl chains of …
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Synergistic modification of bentonite by acid activation and …
ResultSynergistic modification of bentonite by acid activation and hydroxyl iron pillaring was conducted. Larger specific surface area and pore volume was achieved after …
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