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Activation of Bentonite clay using hydrochloric acid (HCl) [15, 16], sulfuric acid (H 2 SO 4 ) [17,18] and other acids [19,20] has been reported. Out of all acids, H 2 SO 4 is preferred mostly as ...
Physico-chemical variation in bentonite by sulfuric acid activation. Leila Karimi. 2009, Korean Journal of Chemical Engineering. See full PDF download Download PDF. Related papers. Engineering Properties of Bentonite Modified with Lime and Gypsum. Rakesh Kumar Dutta.
The acid modification was conducted by properly mixing bentonite with 8 M of nitric acid at 75 °C and 100 rpm. The modification process was terminated by the addition of a large amount of de ...
adsorption of Cr onto the modified bentonite was in the range of 0-1, indicating that the adsorption is a favorable process and the modified bentonite has good potential in removing hexavalent Cr using sulfuric acid. Keywords: Modified bentonite, Sulfuric acid, Adsorption, Hexavalent chromium, Aqueous solution
Acid activation was carried out by heating muds prepared from Ca-rich bentonite (CaB), sulfuric acid (H2SO4) and distilled water, yielding various bleaching earths (BEs). The roles of each of the process variables, namely mass fraction of H2SO4 (x) in the dried CaB and pure H2SO4 mixture, heating temperature (T) and contact time (t), in the ...
Activation of Bentonite clay using hydrochloric acid (HCl) [15], [16], sulfuric acid (H 2 SO 4) [17], [18] and other acids [19], [20] has been reported. Out of all acids, H 2 SO 4 is preferred mostly as the activation can be performed by mild process conditions and the quality of the end product is better with high specific surface area and ...
The raw bentonite treated with 25% sulfuric acid showed a maximum uptake of colored pigments from neutralized cottonseed oil. The bleaching capacities of obtained AX were 70.3%, 73.1%, 83.2%, 81.8% and 88.9% according to above mentioned equation, re- spectively. Thus, it can be seen that the decolorisation ability of the raw bentonite tends to ...
Physico-chemical variation in bentonite by sulfuric acid activation activation process was performed in the presence of 5 M sulfuric acid at 90 oC. It is observed that the specific surface area increases progressively with activation time until a maximum value and then drops considerably, which indicates that the crystal structure of the clay ...
The electrical conductivity of tap water was decreased significantly due to bentonite activated with sulfuric acid, nitric acid, and phosphoric acid solution (removal percentage of approximately 31-39%), as compared to that due to RB. Therefore, the relationship between electrical conductivity and the removed concentration of anion/cation ions ...
Background: Environmental contamination by chromium (Cr) has become an important issue due to its adverse effects on human health and environment. This study was done to evaluate the application of modified bentonite using sulfuric acid as an adsorbent in the removal of hexavalent Cr from aqueous solution. Methods: Adsorbent features were …
The acid modification was conducted by properly mixing bentonite with 8 M of nitric acid at 75 °C and 100 rpm. The modification process was terminated by the addition of a …
industry, activated clay is usually obtained from bentonite and inorganic acid (usually sulfuric acid, hydrochloric acid) at the desired temperature after continuous mixing for a certain period. Acid treatment can remove mineral impurities, and H+ with small ionic radius can exchange with interlayer cations such as Ca2+ and Mg 2+ [18, 28].
The physico-chemical behavior of Iranian typical bentonite was characterized during the activation process by sulfuric acid. The main variations were studied by evaluating …
Spent acid waste is produced in the petroleum processing industry at the alkylation process unit that requires sulfuric acid as a catalyst to produce iso-octane. Therefore, spent acid contains sulfuric acid attached to a long chain carbon and other compounds. This compound is corrosive and has a pH below 1.0, so that it cannot be
The obtained results showed that the activation of bentonite with sulfuric acid leads to a significant improvement in structural and textural characteristics. Using these results it can be assumed that this bentonite will have good adsorption characteristics and can serve as an alternative in comparison with imported commercial aluminosilicate ...
To increase the porosity of the supporting materials, bentonite was modified by sulfuric acid at different concentrations (3, 6, and 9 M), which were noted as Ben_H2SO4_3M, Ben_H2SO4_6M, and Ben_H2SO4_9M. The desired amount of bentonite was added into the sulfuric acid solution at a fixed ratio of 10 cc of sulfuric acid to 1 g 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 …
Balci, S. (2019) Structural property improvements of bentonite with sulfuric acid activation and a test in catalytic wet peroxide oxidation of phenol. International Journal of Chemical Reactor Engineering, 17, 20180167.Google Scholar
The finished product of the present petition (Acid-activated bentonite, CAS #9) is prepared by treating naturally occurring bentonite clay with sulfuric acid. 1 See Appendix, Attachment #1: paper, G.W. McWard, D.R. Taylor, Acidified Clay Litter Amendment, J. Appl. Poultry Research, 9, 518-529 (2001)
Stability of bentonite in sulfuric acid solution 2.1. Sample treatments 3.1.1. XRF data The data of XRF analysis are presented in Table 1. A complete exchange of Na+ cations by protons was occurred, and small amounts of Mg2+, Fe3+ and Al3+ cations were removed from the clay mineral layers. As acid/clay mineral ratios increased, slight changes ...
Stability of bentonite in sulfuric acid solution3.1.1. XRF data. The data of XRF analysis are presented in Table 1. A complete exchange of Na + cations by protons was occurred, and small amounts of Mg 2 ...
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).
Mineral acids such as sulfuric acid and HCl are used for the activation of bentonite (BALCI, 2016). H + ion is substituted with Al 3+ and other cations of octahedral and tetrahedral …
The acid activation of bentonite from Middle Anatolia, consisting of mostly montmorillonite, with a hot solution of H 2 SO 4 with different concentrations was carried out. …
The physico-chemical behavior of Iranian typical bentonite was characterized during the activation process by sulfuric acid. The main variations were studied by evaluating specific surface area, chemical and mineralogical composition, thermal gravimetric curves, Fourier transform infrared spectrometry pattern, and morphology of starting and activated samples. …
How to Keep Clay Mask from Clogging Drain. Published By Nathan Sanders ; Last Updated On October 9, 2024
From natural methods like baking soda and vinegar to chemical methods like sulfuric acid neutralizers, ... Clay, specifically bentonite clay, is another natural wonder that can be used to neutralize battery acid. Bentonite clay has a unique property called "absorbency," which allows it to absorb and neutralize acidic substances. When mixed ...
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 13 M has been studied. Bentonite activated with 3 M sulfuric acid (AAS) showed a higher efficiency in removing humic acid from aqueous solutions and was selected for further investigation.The …
The XRD patterns of the bentonite inundated with water and acid solutions are shown in Fig. 4.Bentonite is dominant with sodium montmorillonite along with kaolinite and quartz.The formation of a new mineral, gypsum, was observed in the bentonite with 1 N H 2 SO 4 and 4 N H 2 SO 4. Gypsum is a calcium sulphate hydrate mineral. As stated earlier, the …
They performed the acid activation of bentonite by sulfuric acid. The results revealed that as the temperature increased, a shorter heating time is required to achieve the maximum surface area. Maximum CR adsorption of approximately 7.0 mg g −1 was obtained by the ATA bentonite with 0.1 M HCl at 100 °C.