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, functional, and textural analysis.
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The sodium removal percentage for bentonite activated for 3 h increases with activation temperature. For bentonite activated for 6 and 12 h, the trend in sodium removal follows the trend observed for the specific surface area shown in Figure 2.
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Sodium-activated bentonite is a chemically modified bentonite, originally a non-sodium bentonite, whose interlayer cations are replaced by Na + by means of cation …
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The activated bentonite (BB) was collected by centrifugation, subsequent by washing extensively with deionized water (DW) until the washing solution reached to a neutral pH before it was dried...
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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 ...
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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.
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A new process for manufacturing organically compounded bentonite was developed successfully based on the organic intercalation and layered structure of bentonite. …
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A calcium bentonite clay from Boane region (Mozambique) was subjected to an Na2CO3 activation process. The methylene blue test together with energy-dispersive X-ray spectroscopy (EDX) analysis indicated the successful ion exchange of Ca2+ by Na+ ions since the cation exchange capacity (CEC) increased from 67.5 to 74 meq/100 g and the Na/Ca ratio …
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The present investigation utilized activated sodium bentonite clay as an adsorbent agent to facilitate the elimination of Cr (VI). The clay was subjected to acidification and thermal modification techniques to enhance its adsorption capacity.
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The thermally activated bentonite was studied for the removal of sodium ions from an aqueous solution using batch adsorption. The batch adsorption was conducted for an initial …
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The present investigation utilized activated sodium bentonite clay as an adsorbent agent to facilitate the elimination of Cr (VI). The clay was subjected to acidification and thermal …
WhatsApp: +86 18221755073
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 procedure is recommended as …
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The purified bentonite was activated by sodium ions at room temperature. FTIR, XRD, TGA, and BET surface area measurements were performed. OMW was contacted with both purified and activated bentonite in the batch technique to figure out the optimum parameters for the adsorption process.
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The bentonite is a widely available and abundant natural mineral, and can be a low cost adsorbent for water and wastewater treatment. This study reported here was directed towards identifying a cost-effective activation protocol for enhancing the adsorption capacity of Australian bentonite for removal of toxic contaminants in wastewater.
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Yildiz et al. activate local Ca-bentonite with soda ash to increase the Na/Ca ratio and disperse the activated bentonite in sodium hexametaphosphate solutions to increase the stability of the suspension. ... Process for producing sodium-base bentonite from calcium-base bentonite 2015. US US14/953,916 patent/US9676669B1/en not_active ...
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The activated bentonite (BB) was collected by centrifugation, subsequent by washing extensively with deionized water (DW) until the washing solution reached to a neutral …
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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 bentonites can be activated by conventional soda-ash additions.
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The sodium content value (3.12%) recorded for Na-bentonite shown in Table 2 was similar to those previously reported in the literature 36 where sodium content between 2.9 and 3.2% was found by ...
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The thermally activated bentonite was studied for the removal of sodium ions from an aqueous solution using batch adsorption. The batch adsorption was conducted for an initial sodium concentration of 2,196 mg/L by adding 0.5 g of adsorbent to 0.04 L of salt solution (solid-to-liquid ratio of 1.0 g/80 mL), adsorption time of 3 h and at pH of 10.
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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 …
WhatsApp: +86 18221755073
The Jordanian Ca-bentonite is activated by sodium ions to produce an efficient adsorbent with improved adsorption capacity toward pollutants in OMW. AJB will be examined …
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The Jordanian Ca-bentonite is activated by sodium ions to produce an efficient adsorbent with improved adsorption capacity toward pollutants in OMW. AJB will be examined as an adsorbent for the removal of TPC from OMW, investigated for the effect of the adsorbent dosage as well as the initial concentration and temperature on adsorption efficiency.
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Loading activated natural bentonite clay (BC) into any type of polymer can improve the adsorption property of electrospun nanofibres, but BC must be well dispersed, suspended and loaded to achieve any benefit. Naturally occurring calcium BC was completely activated to sodium BC with a 4 wt.% sodium carbonate (Na2CO3)/BC ratio. High throughput ...
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Sodium activation, which is an example of chemical modification, is a process developed in the 1930s [5,6]. The discovery was prompted by the observation that only bentonites rich in Na-smectites were suitable for the use as binders in foundry moulding sands, while bentonites containing Ca-smectites proved inadequate for this purpose [ 4 ].
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An optimum removal of sodium by activated bentonite was 19.4% at adsorption conditions of time 180 min, salt concentration of 3486 ppm, solution pH of 10 and adsorbent dosage of 0.5 g. ... small R 2 value in this model is to mean the process is homogenous surface and chemical process better explains sodium adsorption to bentonite. A small value ...
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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 …
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Activated Bentonite has initial composition of Ca 2+ -ions in the intermediate layer replaced with Na + -ions in a technical process known as alkali-activation.
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The novelty of this study is about sodium bentonite characterization and the results show the prominent behaviour with structural, elemental, morphological, and thermal analysis. Acid-activated kaolin sample has less effect in comparison with acid-activated sodium bentonite. As the removal of the hy …
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The effect of solution pH on the adsorption process was examined by regulating the solution pH from 2 to 12 by the addition of 0.1 M of hydrochloric acid (HCl) or sodium hydroxide (NaOH) solution.
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Sodium Bentonite Activated Clay. J Chem Eng Process Technol 8: 349. doi: 10.4172/2157-7048.1000349 ... sodium bentonite by a simple sodium exchange process. Since the exchangeable cation present in bentonite are easily replaceable, Na+ is readily replaced by Ca2+ and Mg2+ under leaching
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