Non-isothermal kinetic analysis of thermal decomposition of the Ca-bentonite from Santai, China. June 2014; ... activated, initial reaction followed by n-order competitive reaction (C 1E F n F n ...
TIXOTON (Ca-bentonite activated by sodium carbonate) was treated with four different organic compounds representing organic acids, bases, non-ionic polar molecules and non-polar molecules found in waste and sewage water.They were acetic acid, diethylamine, ethyleneglycol and n-heptane.The first three were used as 5% aqueous solutions, and the …
Thermal activation, performed by heating clay in a specific range, is the most technically and economically feasible method for clay activation (Toor and Jin 2012). During thermal …
1. Introduction. Uranium is a naturally occurring radioactive element that is a primary raw material for nuclear energy. However, the resources of uranium in nature are limited comparing to the large consumption of uranium based on the fast development of nuclear energy [1], [2], [3].Meanwhile, excessive amounts of uranium have been released into the …
Water treatment is of paramount importance to ensure the availability of clean and safe drinking water. In recent years, clay-based materials have gained significant attention as promising adsorbents for water treatment applications. This review provides a comprehensive analysis of different clay types and their surface adsorption properties for water treatment. …
Bentonite produced in Xiazijie, Xinjiang (China) was characterized by X-ray diffraction (XRD), dif- ferential thermal analysis (DTA), thermogravimetric analysis (TG) and cation exchange capacity ...
Vijayakumar 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. Esterification was carried out of different carboxylic acids …
Thermal activation, performed by heating clay in a specific range, is the most technically and economically feasible method for clay activation (Toor and Jin 2012). During thermal activation, water molecules, volatile organic compounds, and other impurities are removed with increasing temperature from the double-layer sheet of bentonite via a ...
The material for this study was natural Ca-rich bentonite clay (B25) containing high montmorillonite (80–85%), mined in Zhengzhou, Henan Province, China. The physical properties and chemical composition of B25 are shown in Table 2. The bentonite was ground and sieved to less than 1 mm. Bentonite samples were calcined in a muffle furnace for 2 ...
Thermal activation of bentonite through heat treatment can enhance its pozzolanic activity 17,18,19, which in turn increases the compressive strength of the material …
Despite presenting a very high global warming toll, Portland cement concrete is the most widely used construction material in the world. The eco-efficiency, economy, and the overall mechanical and durability performances of concrete …
Zhejiang Yuhong New Materials Co., Ltd: Find professional bentonite, activated bleaching earth, organic bentonite, sodium bentonite, activated clay manufacturers and suppliers in China here. We warmly welcome you to buy bulk high quality bentonite at competitive price from our factory. Contact us for more details.
The window for practical thermal activation is larger in kaolinite (600–950 °C) than illite ... since the whiteness of china clay is important for many applications such as paper and paint, and other fuels may give colour or leave black specks in the product. ... Taylor-Lange SC et al (2015) Calcined kaolinite–bentonite clay blends as ...
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 ...
On the other hand, for proper thermal activation, they needed a lower temperature. 600°C seemed to be optimal for the bentonitic clays, while for kaolinite the better results were …
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 used in high-temperature …
The successful preparation of AAC using bentonite has been reported, but only a few studies have been conducted on low-purity calcined clay [21,22,23]. Compared to other types of clay, bentonite has storage and performance advantages. However, studies on the pozzolanic activity of bentonite have been under-appreciated.
The TG–DTG–DSC, XRD, and FT-IR spectroscopy were used to study the difference in structure and thermal t behavior of two bentonite samples selected from China between the X-1 sample and the J-1 sample. The TG–DTG–DSC data indicated that two water molecular layers were present in the interlayer of the X-1 bentonite, but one water ...
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.
Natural 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 ...
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 semiconducting behavior for temperatures greater …
Bentonite is a mixture of clay and non-clay minerals. Montmorillonite clay mineral is a dominant mineral in bentonite. Silica and alumina bond in the crystal structure of montmorillonite. ... Thermal activation of bentonite clays leads to obtaining pozzolanic material, but there is no specific activation program due to differences in bentonite ...
This study evaluates the effectiveness of a nanocomposite composed of Rumex Abyssinicus Activated Carbon/Acid Activated Bentonite Clay/Graphene Oxide, and Iron …
Thermal activation of bentonite through heat treatment can enhance its pozzolanic activity 17,18,19, which in turn increases the compressive strength of the material and addresses the issue of ...
China have led to a 2.6% ... 40 and 60%) and sulfuric/acetic mixtures (1:1 ratio) were used in the bentonite clay activation. The activated clays ... thermal activation at 200°C for 2 h, acid ...
There are four major ways to activate bentonite and improve many of its properties. Those include (i) chemical, (ii) physical, (iii) pillaring, and (iv) thermal procedures. Bentonite is activated by the application of inorganic acids (such as H 2 SO 4 or HCl) for replacing the exchangeable ions of bentonite during chemical procedure. Physical ...
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. Non-isothermal kinetic analysis was employed to study the thermal decomposition mechanism by using Netzsch Thermokinetics software. Flynn-Wall-Ozawa and …
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 evolution of the …
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 ...
Bentonite is a type of clay that is composed primarily of the mineral montmorillonite. It is a highly absorbent clay that has many uses in various industries, including cosmetics, pharmaceuticals, and construction. ... Activated bentonite: This type of bentonite has been treated with acids or other chemicals to increase its surface area and ...
