activation of bentonite by organic acid in Oman
Impact assessment of Zeolite, Ca-bentonite and Biochar
The refining of polluted soils by heavy elements is one of the most important environmental policies in industrialized and developing countries. Using adsorbents is a suitable procedure for the immobilization of heavy metals in polluted soils. This study aimed to assess the immobilization of Cadmium (Cd) in polluted calcareous soil affected by the …
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Characterization of Acid Activation of Bentonite Clay of …
2.2 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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One step acid activation of bentonite derived adsorbent for …
Magnesium and to a lesser extend, aluminium are the most readily removed elements during acid modification. Similarly, bentonite activation is a complex …
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Isotherm modeling of organic activated bentonite and humic acid …
The adsorbents, an organically activated bentonite (OAB) and a humic acid polymer (HAP), were tested in a common in vitro model with a pH course comparing the maximum pH changes that can be expected in the digestive system of a monogastric animal, i.e. pH 7.4 for the oral cavity, pH 3.0 for the stomach, and pH 8.4 for the intestines.
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Adsorption of organic matter from industrial phosphoric acid …
DOI: 10.1016/J.ARABJC.2013.01.014 Corpus ID: 96828479; Adsorption of organic matter from industrial phosphoric acid (H 3 PO 4 ) onto activated bentonite @article{Khoualdia2017AdsorptionOO, title={Adsorption of organic matter from industrial phosphoric acid (H 3 PO 4 ) onto activated bentonite}, author={B{'e}chir Khoualdia …
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SURFACE ACTIVATION OF FULLER'S EARTH (BENTONITE CLAY) USING ORGANIC ACIDS
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 …
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Characteristics of Raw and Acid-Activated Bentonite …
after the acid activation of bentonite sulfuric acid, nitric via acid, and phosphoric acid solutions at different concentrations. This was due to leaching of the octahedral cations from the interlayer of the adsorbents and the subsequent re-generation of the pores during acid activation treatment. Similar trends
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Characterization of activated bentonite clay mineral and the …
After the acid activation, the analysis data showed a significant change in the chemical composition in modified bentonite clay, compared to the raw bentonite …
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Characterization of activated bentonite clay mineral and …
The presence of emerging pollutants such as hazardous chemicals, pharmaceuticals, pesticides, and endocrine-disrupting chemicals in water sources is a serious concern to the environment and human health. Thus, this study focused on exploring the interaction mechanisms between ciprofloxacin (CIP) (antibiotic) and clay (a …
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Effect of the Acidic and Alkaline Activation of Bentonite …
These acids are often used at the stage of purifying bentonite clays. Hydrochloric acid promotes more efficient transformation of smec-tites to the H-from without side processes of oxida-tion. Hydrochloric acid is therefore used most often for the acidic activation of clay. The conditions of the acidic treatment of bentonite-like clays from ...
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Characterization, Acid Activation and Bleaching Performance …
Four organic acids are used which are recommended best for activation. These acids are acetic acid, phosphoric acid, citric acid and oxalic acid. ... The acid activation of bentonite from Middle ...
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Thermal activation, characterization and performance …
In our earlier work, the performance of acid-treated bentonite for the removal of sodium from water was reported (Musie & Gonfa 2022). Chemical activation methods using acid or alkali may leave chemical residue and cause environmental problems (Barakan & Aghazadeh 2021).
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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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Acid Activated Indian Bentonite, an Efficient Catalyst for
To prepare acid activated Indian bentonite, the Indian bentonite was slurried with water and then mixed with conc. H 2 SO 4 (98%) at predetermined acid/clay ratio of 0.30 so as to form a clay slurry, which was heated on a water bath at 90 °C for 16 h with constant stirring (pH 1.84). At the end of the reaction time the activation was …
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The Acid Activation of Some Bentonite Clays.
J. Phys. Chem. All Publications/Website. OR SEARCH CITATIONS
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Preparation and Characterization of Acid-Activated Bentonite …
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 …
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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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Application of Acid Activated Bentonite for Efficient Removal …
The natural Egyptian bentonite was collected from El Alamein region and activated by acid activation (Ali et al., 2019) and alkali activation (Magzoub et al., 2017). Acid activation was done by ...
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Naturally occurring bentonite clay: Structural augmentation
Activation of Bentonite clay using hydrochloric acid (HCl) [15], [16], sulfuric acid (H 2 SO 4) [17], [18] and other acids [19], [20] has been reported. Out of all acids, H 2 SO 4 is preferred mostly as the activation can be performed by mild process conditions and the quality of the end product is better with high specific surface area and ...
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One step acid activation of bentonite derived adsorbent for …
Magnesium and to a lesser extend, aluminium are the most readily removed elements during acid modification. Similarly, bentonite activation is a complex phenomenon that involves the substitution of exchangeable cations, Al 3+, Mg 2+, and Fe 2+ against protons from the octahedral sheet, resulting in the improvement of bleaching …
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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 …
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Sodium salt-assisted low temperature activation of bentonite …
One 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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Influence of acid activation on the NH3-adsorption …
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 treated with HCl solutions of various concentrations (0.5–2.5 M) at …
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Modification of bentonite by combination of reactions of acid …
The 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 TBHP present in the clay.
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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 …
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Activation of Jordanian Bentonite by Hydrochloric Acid and …
The purified bentonite was prepared for acid activation: 15 g ± 0.01 g of the purified sample was weighed into a flask and 200 mL of 1.0 M HCl was added. The …
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Activating natural bentonite as a cost-effective adsorbent for …
Acid activation. The acid activation was carried out in a 250 mL breaker with 100 mL working volume. The samples were mixed properly in a rotary shaker …
ادامه مطلبOrganically modified activated bentonites for the reversible …
Acid activated bentonite (AAB) was prepared by acid treatment of an Algerian bentonite (Bent) originating from Maghnia repository. Thus a 200 g clay …
ادامه مطلبAdsorption of organic matter from industrial phosphoric acid (H3PO4
The purified bentonite must be activated later by the same method described for the purification and activation, the cation exchange capacity (CEC) determined by the methylene blue method after purification activation was about 120.82 meq/100 g air-dried bentonite and the mass yield was 58.97%.
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Synthesis, characterization and properties of organically …
A new process for manufacturing organically compounded bentonite was developed successfully based on the organic intercalation and layered structure of bentonite. The main steps in the proposed process included wet sodium activation of bentonite ore, organic compounding and high-pressure roll grinding. The optimum …
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