Al-intercalated acid activated bentonite beads for the …
It was reported that the polymeric composite beads prepared using alginate have specific characteristics such as high porosity, high surface area, high affinity in charged molecules, high ...
acid activated bentonite high surface area in Oman
Clay-based materials for enhanced water treatment: …
The adsorption process requires adsorbent that is cheap and have high surface area. High surface area may results in increase in adsorption potential . A variety of materials have been used as adsorbent such as activated carbon, agricultural solid wastes, agricultural solid waste based on activated carbon, clay and minerals . …
Optimization and Characterization of Acid- Activated …
bentonite showed good adsorptive properties and thermal stability. The analysis revealed that there is a rise in the specific surface area of the activated bentonite clay compared to that of the raw bentonite clay (from 41.7065 to 49.227 m²/g). Keywords-Acid-Activated, Bentonite, Modeling I. INTRODUCTION
The effect of sulphuric acid activation on the crystallinity, surface …
DOI: 10.1016/J.FOODCHEM.2007.03.060 Corpus ID: 96018042; The effect of sulphuric acid activation on the crystallinity, surface area, porosity, surface acidity, and bleaching power of a bentonite
Insights on applications of bentonite clays for the removal …
In contrast, activated clay (Fig. 3b) revealed a rugged and uneven surface of the adsorbent, providing a large surface area (1638.66 m 2 g −1) and porosity for adsorption. The adsorption capacity of the HCl-activated bentonite was almost three times higher than that of raw BCs.
TGA curves of raw and acid activated Jordanian bentonite.
It was confirmed that acid treatment is an economical (∼ $400/t) and effective way of preparing environmentally benign porous activated clay having high surface area, pore volume and ...
The effect of sulphuric acid activation on the crystallinity, surface …
The Hançılı (Keskin, Ankara, Turkey) bentonite was activated with H2SO4 by dry method at 97 °C for 6 h to obtain optimum parameters for imparting a maximum bleaching power towards soybean oil.
Characterization of Acid Activation of Bentonite Clay of …
Figure 2: SEM image at low and high resolution of a) Native and b) Activated bentonite 3.2 XRD Analysis The XRD results (data base of MDI Jade 6.3 version) revealed that the activated bentonite clay
Characteristics of Raw and Acid-Activated Bentonite and Its …
Materials. In the study, RB and the required acid solutions were purchased from FUJIFILM Wako Pure Chemical Corporation (Japan). Acid-activated RB was prepared via the following method: Five grams of RB was mixed with 50 mL of sulfuric acid, nitric acid, and phosphoric acid solutions at concentrations of 1, 5, and 10 mol/L, respectively. The …
Frontiers | Potential of Acid-Activated Bentonite and SO3H
Characterization of the Synthesized SO 3 H-MWCNTs. The BET surface area of the synthesized SO 3 H-MWCNTs was measured at 230 m 2 /g, with the pore volume and diameter recorded at 0.76 cm 3 /g and 11 nm, respectively. This high BET surface area was because of inducing the repulsion force between SO 3 H and COOH …
Simultaneous determination of cation exchange and surface area of acid …
The optimum procedure is recommended as follows: 5 mass% of sodium carbonate powder and 30 wt.% water are added to activate the bentonite ore for 24 h to prepare activated bentonite; 0.5 wt.% of ...
(PDF) Surface properties of pillared acid-activated bentonite …
The number of and Bronsted acid sites was strongly increased by intercalating of aluminum polyhydroxyl into the acid treated samples. Pillaring also improved micropore volume and consequently specific surface area of the samples. Pillared acid-activated bentonite was used for alkylation of benzene with 1-decene in liquid phase conditions.
Review Textural characteristics, surface chemistry and …
The author reported that an increase in acid concentration greatly increased the specific surface area of the activated bentonite clays from 63.4 m 2 g −1 to 202 m 2 g −1. They observed the maximum specific surface area of activated bentonite was obtained when the temperature and acid concentration increased simultaneously.
Preparation and characterization of acid-activated bentonite …
Semantic Scholar extracted view of "Preparation and characterization of acid-activated bentonite powders" by M. Önal et al. ... The Hançılı bentonite from Turkey shows significant changes in surface area, micro- and mesoporosity, surface acidity and acid strength with heating from 100 to 900°C for 2 h. The specific surface … Expand. 54. PDF.
Fabrication of hydrophobic regenerated activated carbon with high
Activated carbon (AC) has been widely used in food, medicine, air and water pollution control and other fields [1,2,3,4,5,6,7,8,9].Due to its good physical and chemical properties such as high mechanical strength, high specific surface area and chemical stability, AC becomes the most popular adsorption material, which can remove …
Evolution of surface properties in a bentonite as a function of acid …
The evolution of surface properties, such as surface acid centres, porosity and specific surface area, in a bentonite from Almeria (Spain) after acid and heat treatments (0.25–2.00 N H2SO4 and 110–40°C) has been studied. The samples were characterized by mercury porosimetry and by X-ray diffraction. The number of surface …
Characteristics of Raw and Acid-Activated Bentonite and Its …
This study aimed to investigate the characteristics of acid-activated bentonite by focusing on its capability of improving the quality of tap water used during wire electrical discharge machining. ... respectively. Scanning electron microscopy images, specific surface area, pore volume, cation exchange capacity, X-ray diffraction patterns, and ...
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 …
Adsorption of humic acid on acid-activated Greek bentonite …
The specific surface area of acid-activated bentonite was estimated using the methylene blue adsorption method. The morphology of untreated, activated, and HA-sorbed bentonite was studied under scanning electron microscope (SEM). ... [6,7], can be reasonably used in order to remove humic acid from water. Activated carbon exhibits a …
Characterization of activated bentonite clay mineral and …
The BET surface area analysis revealed that acid-activated bentonite (AAB) possessed more than two fold higher surface area as compared to NB. Combining pH zpc measurements, effect of solution pH and CIP speciation revealed that CIP sorption onto bentonite is highly dependent on solution pH. Kinetic studies confirmed that CIP …
The specific surface area of natural bentonite at differ- ent …
Natural bentonite was activated with 2 M sulfuric acid, 4.5 h and 95 °C (the best acid-activated sample with the highest adsorption capacity) and the other 6 M sulfuric acid, 7.5 h and 95 °C ...
(PDF) Acid activation of bentonite clay for recycled automotive …
Results were compared with commercial bentonite (Tonsil) having surface area (378 m2/g). The activated sample M1 during 4 h at 75 °C possesses a decolorizing capacity of about 85% greater than ...
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 …
Simultaneous determination of cation exchange capacity and surface area …
DOI: 10.1016/J.APSUSC.2011.10.088 Corpus ID: 97754238; Simultaneous determination of cation exchange capacity and surface area of acid activated bentonite powders by methylene blue sorption
(PDF) Studies on the Acid Activation and High
activated maximum. surface Key products area, were Bentonite, India acid carried and the were 45m2/g (raw to removal of Acid activation India bentonite are which one is of under Generally can be enhanced mainly alkaline for etc process products such acid area and of Decolorization adsorption pore and activated process smectites is process ...
(PDF) Structural and Surface Modification of Oxalic-Acid-Activated …
The specific surface area and pore volume have an upward trend as the acid concentration increases, while they stabilize after 0.7 M (Figure 5). Table 2. Specific surface area and porosity of raw and treated AlBe-G bentonite (80 C; acid concentrations of 0.5 M, 0.7 M and 1 M; 2% of pulp density).
Adsorption of humic acid on acid-activated Greek bentonite
The adsorption of humic acid on bentonite from Milos Island (Greece) acid-treated with dilute H(2)SO(4) solutions over a concentration range between 0.25 and 13M has been studied.
Modeling and optimization process parameters of acid …
The specific surface area and the textural properties of the acid-activated bentonite are strongly affected by the process parameters. The optimum conditions to obtain the maximum specific ...
Naturally occurring bentonite clay: Structural augmentation
The 5 M H 2 SO 4 treated bentonite clay having surface area (305 m 2 /g) and pore volume (0.113 cm 3 /g) when used as a catalyst in esterification reaction gave high conversion (62%) of succinic acid and high yield (73%) of diethyl succinate at moderate reaction conditions. This result clearly demonstrated that acid treatment is an …
Adsorption of humic acid on acid-activated Greek bentonite
The adsorption of humic acid on bentonite from Milos Island (Greece) acid-treated with dilute H(2)SO(4) solutions over a concentration range between 0.25 and 13M has been studied. Bentonite activated with 3M sulfuric acid (AAS) showed a higher efficiency in removing humic acid from aqueous solutions …
- gold milling machine for sale alaska
- minerales silicato pirofilita ventas in Mexico
- maxo mobile stone crusher machine
- crushing plant complete
- crusher manufacturing method
- preparing for hip replacement surgery
- tag1325 stone ball mill machine in Mexico
- cooper alluminuim crusher
- rubber talc machine in Indonesia
- extruder shaker table
- تكلفة سير ناقل في مصر
- تصنيف إعصار الجبس
- كسارة الفك لعملية الذهب
- أسعار الكسارة الفكية المستعملة في مصر
- اجهزه وزن العينات في مختبر مواد البناء
- التعدين مسابقة الجغرافيا
- كسارة متنقلة تعلم
- المعدات المستخدمة في الكشف على البناء
- تقنية خام الرصاص
- مخروط محطم حجر محطم