Activation of Jordanian Bentonite by …
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 ...
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/cm 3 ) solution was added to 50 g of NB sample.
Sodium salt-assisted low temperature activation of bentonite …
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 ...
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 ...
One step acid activation of bentonite derived adsorbent for …
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 effectiveness, greater hydrophobicity and porosity structure, strongly protonated clay mineral surface, increase in specific ...
Activation of persulfate by magnetic MnFe2O4-bentonite …
Magnetic MnFe2O4-bentonite was synthesized by chemical co-precipitation method(CCM) and applied as catalyst in heterogeneous activation of persulfate(PS) to oxidize a target pollutant, 2,4-dichlorophenol(2,4-DCP), in aqueous solutions. The surface morphology and structure of MnFe2O4-bentonite were characterized by X-ray diffraction( XRD), scanning …
Recent advances of application of bentonite-based …
The acid/alkaline washing is the common method for the activation of bentonite to remove impurities (e.g., quartz), eliminate natural occurring cations by H + /OH − exchange in acid/alkaline solution, which increase its specific surface area, reactive sites and porosity.
Activation of (Na, Ca)-bentonites with soda and MgO and …
Nowadays soda activation of bentonite rich in Ca-smectite is a standard industrial practice in manufacturing of drilling muds, binders, litter, adsorbents, barrier clays, etc. Transformation ...
Activation of Jordanian Bentonite by Hydrochloric Acid and …
We aimed to investigate the effectiveness of activated bentonite in OMWW treatment. Batch and column techniques were applied. Crude and treated OMWW samples …
The Influence of Thermo-Mechanical Activation of Bentonite …
In this study, the influence of mechanical and thermo-mechanical activation of bentonite is investigated on properties of concrete. Bentonite was used for 0%, 10%, 15%, 20%, 25%, 30%, and 35% mass ...
Optimised activation of bentonite for toluene adsorption
Acid-activation of bentonite was optimised to prepare an effective adsorbent of toluene. The activated bentonite was obtained with a specific surface area of 195 m 2 /g, a pore volume of about 0.46 cm 3 /g and a most frequent pore size of 62. Å.. Compared to the raw bentonite, the adsorption of toluene onto acid-activated bentonite was increased from 66 …
The Influence of Thermo-Mechanical Activation of Bentonite …
By applying activation techniques, the reactivity of bentonite can be improved, and its incorporation levels can be maximized. In this study, the influence of mechanical and thermo-mechanical activation of bentonite is investigated on properties of concrete. Bentonite was used for 0%, 10%, 15%, 20%, 25%, 30%, and 35% mass replacements of OPC.
Characterization of Acid Activation of Bentonite Clay of …
The applications of various clay minerals are related to their structural, physical, and chemical characteristics. These properties of the clay minerals dictate their utilization in the industries an...
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.
(PDF) Acid activation of bentonite clay for recycled …
Acid activation of bentonite clay for recycled automotive oil purification. johanna aguilar. 2020, E3S web of conferences. See full PDF download Download PDF. Related papers. Activation of Kosovo Bentonite with Sulphuric Acid for Recycling of Used Motor Oils.
Optimization 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.
Kinetic model for the isothermal activation of bentonite by …
The activation of bentonite is carried out in a continuous stirred tank reactor at low temperatures between 70 and 120 °C in the presence of activation agents, mostly sulfuric …
Activation of Jordanian Bentonite by Hydrochloric Acid and …
During the acid activation of bentonite, a decrease in the intensity of stretching and bending bands (a characteristic of octahedral sheet for Al-Al-OH) is observed at 1650 cm −1, which reflects the leaching of octahedral cations, such as Al 3+ and Mg 2+, from the bentonite structure, thus indicating the destruction of the octahedral layer.
MECHANICAL ACTIVATION OF NAVBAHORSK BENTONITE …
Request PDF | On Feb 14, 2022, J.Kh. Khamroyev and others published MECHANICAL ACTIVATION OF NAVBAHORSK BENTONITE AND ITS TEXTURAL AND ADSORPTION CHARACTERISTICS | Find, read and cite all the ...
Optimization of bleaching power by sulphuric acid activation of bentonite
The goal of this study is to systematically evaluate the optimum conditions for the sulphuric acid activation of a Turkish bentonite to produce a powder with the maximum bleaching power for soybean oil by analyzing the individual and combined effects of activation variables including mass fraction of H2SO4 (x) per dried CaB and pure H2SO4 ...
Acid activation of Bentonite for use as a vegetable oil
The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered. The calculations made indicated that all variables display …
Acid activated clays: Materials in continuous demand
Acid activation is a chemical treatment traditionally used on clays, typically bentonites in hydrochloric or sulphuric acid, to obtain partly dissolved materials with enhanced …
One step acid activation of bentonite derived adsorbent for …
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, …
Effects of Bentonite Activation Methods on Chitosan …
to the bentonite suspension, up to a volume of 200 mL. 2.3 Activation and modification of ben-tonite clays The acid activation of bentonite clays has been prepared using 5 g of bentonite was placed in a 500 mL beaker, to which 200 mL of sulfuric acid solution of given concentration (5-30 %) was added. The suspension was kept at
Activation of Non-Swelling Bentonite
The near surface bentonite has undergone extensive calcification, and in some zones it is so heavily altered as to diminish its swelling properties. These low-swelling …
Characterization of activated bentonite clay mineral and …
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 tetrahedral sites (Venaruzzo et al. 2002). However, the alumina content decreased from 20.04% (NB) to 18.76% (AAB); this decrease could be attributed to the dealumination ...
ACID ACTIVATION OF BENTONITE CLAY IN CONDITIONS …
The methods of X-ray diffraction, FTIR, electron microscopy, BET, CEC and others were used for investigation of bentonite activation with hydrocloric acid in conditions of water deficiency, it was established that during bentonite activation inclusions of gypsum play an essential role, promoting saturation of montmorillonite with Ca2+ cations.
Acid Activation
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 …
Characterization of activated bentonite clay mineral and the …
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 …
Characterization of Acid Activation of Bentonite Clay of …
Activations of Ethiopian Hadar bentonite clay were modified by using hydrochloric acid. Hydrochloric acid was used to enhance the activated Hadar bentonite clay to be utilized …