Sodium-modification of Ca-based bentonite via semidry process

Huang, Yanfang; Zhang, Yuanbo; Han, Gaorong; Jiang, Tao; Li, Guanghui; Yang, Yongbin; Xu, Bin; Guo, Yufeng

doi:10.1007/s11771-010-0619-9

Cited by 13 publications

(7 citation statements)

References 7 publications

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“…The green pellet strength of all the samples is over 5 times. This result is qualified and fitted with reality and other research [2,4,9,10]. Fig.…”

Section: Resultssupporting

confidence: 87%

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Metallurgical Properties of Iron Ore Pellet when Using Bentonite Modified by Soda

2023

JST: ETSD

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The study reported the ability to use soda-modified bentonite applied to the pelletization of iron ore and its effect on metallurgical properties such as green pellet strength, compressive strength and degree of reduction. The properties of the pellets were used in different binders for comparison as bentonite, soda-modified bentonite (1, 2 % per weight of bentonite), and soda. Green pellets were tested for drop numbers. After drying and atmosphere firing, pellets were reduced at 900, 1000 and 1100 ºC for 30, 60 and 120 minutes. The obtained results show that when using 1 % soda-modified bentonite as a binder in the pelletization process gives the highest degree of reduction, appropriated green pellet strength and compressive strength. In addition, modifying bentonite by using soda not only increases the adhesion of bentonite without affecting the structure of bentonite but also helps increase the degree of reducibility of iron ore pellets. This modified bentonite by soda can be applied in pellet manufacturing to reduce the bentonite as the binder in pelletization process.

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“…The green pellet strength of all the samples is over 5 times. This result is qualified and fitted with reality and other research [2,4,9,10]. Fig.…”

Section: Resultssupporting

confidence: 87%

“…The problem is how to decrease bentonite content and still ensure the stability and metallurgy properties of pellets. Some recent research shows the effect of modified bentonite on pellets' mechanical properties [6][7][8][9]. On the other hand, various types of binders have been investigated for use in iron ore pelletization.…”

Section: Introductionmentioning

confidence: 99%

Metallurgical Properties of Iron Ore Pellet when Using Bentonite Modified by Soda

2023

JST: ETSD

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“…The prior finding indicated that the tetrahedral and octahedral sheets have disintegrated, and the structural cations have been released, indicating that these cations have been removed from the octahedral positional structure and replaced by sodium ions. The interlamellar gap between crystals is squeezed 34 . The chemical composition and interior structure of activated Na-bentonite clay were altered.…”

Section: Resultsmentioning

confidence: 99%

Comparative study for removal of phosphorus from aqueous solution by natural and activated bentonite

Elgarhy

Mahran²,

Liu

et al. 2022

Sci Rep

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The novelty of the current article is to investigate the adsorption potential of the Egyptian natural and activated bentonite (Na-bentonite) to inorganic and organic phosphorus (IP, OP) in aqueous media. The natural bentonite (NB) was activated to Na-bentonite (Na-B) by a new facile method within 2 h. NB and Na-B were also characterized using XRD, XRF, BET ESM, and FT-IR. The batch experiment has been employed to select the ideal conditions for the removal of inorganic and organic phosphorus (IP, OP) from aqueous solutions. The findings clearly showed that the Na-bentonite is enriched with sodium in the form of Na-montmorillonite with a higher specific area 138.51 m2/g than the value for the natural bentonite 74.21 m2/g. The batch experiment showed maximum absorption for both IP and OP adsorbents occurred at an equilibrium pH = 6, contact time of 40 to 50 min, 40 °C temperature, and a dose rate of 2 mg/L and 1 mg/L, respectively. The equilibrium data displayed better adjustment to Langmuir than the Freundlich, Temkin, and Dubinin-Radushkevich isotherms and adsorption kinetics followed the pseudo-second-order-type kinetic, and the parameters of thermodynamics reveal that adsorption occurs spontaneously and exothermic nature. Na-bentonite proved to be more efficient in removing target material than natural bentonite. The spent bentonites were easily regenerated by chemical methods.

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“…is is an indication of the dissolution of the tetrahedral and octahedral sheets and subsequent release of the structural cations, that is, these cations have been eliminated from the octahedral positions, thereby exchanging with Na + ions. Moreover, the interlamellar spacing between crystal grains is compressed [49].…”

Section: X-ray Diffractogramsmentioning

confidence: 99%

Effective Approach of Activated Jordanian Bentonite by Sodium Ions for Total Phenolic Compounds Removal from Olive Mill Wastewater

Al-Essa

2021

Journal of Chemistry

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Olive mill wastewater (OMW) is nowadays considered a serious environmental problem, especially within the Mediterranean region. With this in mind, water shortages are also a very serious and prevalent concern in third world countries. The aim of this study is to investigate the feasibility of using Jordanian bentonite, a simple and natural clay, as a possible adsorbent to decrease the negative characteristics of raw OMW, as an approach to the development of a methodology that addresses the OMW problem without affecting freshwater resources. 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. Physiochemical parameters of OMW were measured before and after treatment. The maximum adsorption qm was found as 8.81 mg/g at 323 K for the total phenolic compounds. The Langmuir and Freundlich models were utilized to describe the equilibrium isotherms and both models fit well. The parameters of thermodynamic show that the adsorption process was feasible, spontaneous, and endothermic in nature. These promising results along with the sodium activation of bentonite significantly improve bentonite’s adsorption capacity.

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Sodium-modification of Ca-based bentonite via semidry process

Cited by 13 publications

References 7 publications

Metallurgical Properties of Iron Ore Pellet when Using Bentonite Modified by Soda

Metallurgical Properties of Iron Ore Pellet when Using Bentonite Modified by Soda

Comparative study for removal of phosphorus from aqueous solution by natural and activated bentonite

Effective Approach of Activated Jordanian Bentonite by Sodium Ions for Total Phenolic Compounds Removal from Olive Mill Wastewater

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