This review begins by introducing the diverse types of clays commonly used in water treatment, including kaolin, montmorillonite, bentonite, and others. Each clay …
One of the most common chemical modifications of clay minerals, used for both industrial and scientific purposes, is their acid activation. This consists of the reaction of clay minerals with a mineral acid solution, usually HCl or H 2 SO 4.The main task is to obtain partly dissolved material of increased specific surface area, porosity and surface …
Thermally activated bentonite (TAB) is a relatively low reactive pozzolan when used as partial replacement of Portland cement modifies both fresh and hardened …
In the present work, we report the mechanical, thermal, and electrical behavior of a pure Moroccan bentonite clay as well as compacted sand (S), cement (C) and lime (L) based on bentonite (B) with a sand content maintained at 80% and a compaction intensity of 80 bars. The impedance spectroscopy data shows a …
This study addresses the urgent need for effective water treatment methods by synthesizing and characterizing activated bentonite clay (ABC) adsorbents to remove methylene blue () from aqueous solutions efficiently. Conventional adsorbents often exhibit limitations in efficiency and regeneration capabilities, necessitating novel …
Changes of the bentonite by dehydration and dehydroxylation, which occur as a result of increasing of temperature, are manifested in thermal analysis results. DTA …
where k 1 (1/h) and k 2 (g/mg h) is the adsorption rate constant for the pseudo-first and pseudo-second order kinetic equation respectively, while a (mg/g h) is the initial sorption rate and b (g ...
Activated charcoal and bentonite clay are two popular natural substances used in many beauty and health products. These two ingredients are known for their detoxifying properties, and they are often used in skin care products, such as face masks and cleansers, to purify the skin and treat a variety of skin concerns. In
Bentonite is a type of clay that has the unique ability to swell and form gels when hydrated. This property is due to the structure of the clay particles and their interaction with water molecules. When dry, the clay particles in bentonite are tightly packed together and have a small surface area exposed to the surrounding environment.
Bentonite activated at 200 °C showed higher CEC, however, lower specific surface area. For thermal treatment at the temperature of 400 °C and above, both the surface area and CEC were observed to be low for consideration. Hence, bentonite activated at a temperature of 300 °C for 6 h was selected for adsorption performance studies. 3.6.
Semantic Scholar extracted view of "Thermal and Acid Activation (TAA) of Bentonite as Adsorbent for Removal of Methylene Blue: A Kinetics and Thermodynamic Study" by T. Taher et al. ... Bentonite is a type of clay that is used as a basis for water-based drilling mud in the of oil and gas wells drilling throughout the world including Indonesia ...
The thermal decompositions of Ca-bentonites (CaB) from Santai, Shichuan Province, China, over the temperature range of 30–1,100 °C were investigated by simultaneous thermal analyzer.
XRF analysis was carried out to confirm the changes in the chemical composition of the bentonite clay due to acid treatment as described in Section 2.3.The results are presented in Table 2.The raw bentonite sample predominantly contained silica (SiO 2), alumina (Al 2 O 3) and iron oxide (Fe 2 O 3).In addition, some impurities in the …
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 …
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A white calcium bentonite (CaB) from the Kütahya region, Turkey, contains 35 wt. % opal-CT and 65 wt. 9c Ca-rich montmorillonite (CaM). Samples were heated at various temperatures between 100–1300°C for 2 h. Thermal gravimetric (TG), derivative thermal gravimetric (DTG), and differential thermal analysis (DTA) curves were …
In this research, modification for the natural bentonite clay was achieved using thermal activation and iron modification. The ability of different adsorbents (natural bentonite, thermal-activated bentonite and iron-modified bentonite) in removing tetracycline from contaminated water was examined utilizing artificial neural network …
233.70, and 208.83 mg/g, when using bentonite clay activated through 6 min of microwave irradiation (800 W), 10 % sulfuric acid treatment, and calcinations at 600 °C, respectively. When the chitosan
Sodium bentonite is most widely known for its ability to swell. It can absorb nearly 5 times its weight in water and at full saturation may occupy a volume 12 to 15 times its dry bulk. ... Bentonite Clay. 2. SAP No 1000064966. 3. Supplier Oman Drilling Mud Products Co.LLC. 4. Composition Alumina and silica in the ratio of 1:4 m/m. soda ash ...
In addition, activation of bentonite by acid or thermal treatment has been concerned by researchers (Alemdaroğlu et al., 2003;Al-Zahrani et al., ... The natural clay bentonite (B) as adsorbent of ...
1 Altmetric. Metrics. The sodium salt-assisted low temperature activation of bentonite (BB) was attempted. The unique features of the raw bentonite and BB were …
Toor et al. conducted thermal activation of bentonite in a muffle furnace in the temperature range of 50–500 °C for a predetermined time varying from 50 to 120 min. The maximum Congo Red adsorption was experienced when bentonite was activated at 100 °C for 20 min, and activated bentonite exhibited more than 20% increase in surface …
Samples of original and thermally treated bentonite at 650 °C 4 h were characterized with chemical analysis, X-ray diffraction, thermal analysis, mercury porosimetry, differential scanning calorimetry, physisorption measurement and scanning electron microscopy.These consequence of the heating have been found. The chemical …
The purpose of this study was to apply a factorial 2 3 experimental design to a Serbian bentonite in order to determine the influence of microwave heating on the acid-activation process. The effect of acid activation under microwave irradiation on the textural and structural properties of bentonite was studied as a model reaction.
Thermal activation is observed to increase the intensity of quartz peak due to the removal of impurities and removal of water from the bentonite structure. This …
Acid activation is a chemical treatment traditionally used on clays, typically bentonites in hydrochloric or sulphuric acid, to obtain partly dissolved materials with …
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 ...
In some applications, natural sodium-rich bentonites are preferred, and custom regulations require proper declaration of Na-rich bentonites, with respect to activation. …
Bentonite is one of the clay materials that have important characteristics and is applicable to construction and for different industrial uses. Treatment of this material to enhance some of its physicochemical properties to suit the desired applicability has been a focus research area. In this work, natural bentonite from Warseisso, Afar region, …
The paper deals with the preparation of several alkali-activated sets, specifically (a) anhydrous Na 2 CO 3 with trace amounts of thermonatrite (Na 2 CO 3.H 2 O) and trona (Na 3 (CO 3)(HCO 3).2H 2 O), hereafter called ASC, (b) mixtures of ASC with CaCO 3, and (c) mixtures of ASC with CaCO 3 and a Ca 2+-rich bentonite at different moisture ...
The results clearly showed that the chemical modifications of the bentonite clay caused a desired effect on its final properties (thermal, barrier (water absorption), …
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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 ...
Dialkylated diphenylamine, renowned for its exceptional thermal stability and antioxidant activity, are extensively used as antioxidants. Raw bentonite after acid-treatment was carried out and the catalytic performance of various solid acid catalysts was tested, and acid-treated clay exhibited the best. In addition, the relationship between …
Clay minerals are potential candidates as raw materials for new supplementary cementitious materials (SCMs) that can partly replace Portland cement and thereby significantly reduce CO2 emissions associated with cement production. We present the characterization of the complex, disordered structure of a pure montmorillonite clay …
Zhejiang Yuhong New Materials Co.,Ltd. Tel: +86-572-5800000. Mob: +86. Email: ywx03@chinabentonite Add: TianZihu Town, Anji County, Zhejiang Province ...
A new method of Na-activation of raw bentonite, rich in Ca-montmorillonite, consisting of combined thermal treatment at 200 °C, followed by immediate impregnation with aqueous solution of Na 2 CO 3 of concentration corresponding to 0.5, 1.0, 1.5, or 2.0 cation exchange capacity (CEC) of clay, was investigated. Structural and compositional …
The thermal stability of bentonite is vitally important for its application in the casting field and the layer charge of montmorillonite (Q m) is one of its central crystal-chemical parameters.As the main component of bentonite, the influence of Q m on montmorillonite properties and behavior needs to be considered if bentonite is to be …
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).
GMZ bentonite. Bentonite is an absorbent aluminum phyllosilicate clay bedded with a soapy texture and a waxy appearance. The mineralization of bentonite was a process of interaction between the firstly formed continental volcanic sediment and then suffering from interaction with ground water and weathering (Liu and Wen 2003).The …
