Effect of the Acidic and Alkaline Activation of Bentonite-Like Clays on Sorption Properties in Relation to Fe3+ Ions under Static Conditions

Vezentsev, A. I.; Volovicheva, N. A.; Korolkova, Svetlana V.; Sokolovskiy, P. V.

doi:10.1134/s0036024422010265

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…The re-polymerization of these leached elements forms new aluminosilicate phases characterized by increased surface areas and porosities. This structural evolution is instrumental in the elevated adsorption capacities noted in BABC samples, distinguishing them from their AABC counterparts, which exhibit a more constrained compositional modification due to the acid activation mechanism primarily focusing on the extraction of octahedral cations without significantly promoting the formation of new crystalline phases [51][52][53].…”

Section: Ftir Analysismentioning

confidence: 99%

Optimized Bentonite Clay Adsorbents for Methylene Blue Removal

Hamad,

Idrus,

Yusuf

et al. 2024

Processes

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This study addresses the urgent need for effective water treatment methods by synthesizing and characterizing activated bentonite clay (ABC) adsorbents to remove methylene blue (MB) from aqueous solutions efficiently. Conventional adsorbents often exhibit limitations in efficiency and regeneration capabilities, necessitating novel approaches to water treatment. The primary objective is synthesizing and characterizing high-quality ABC adsorbents capable of effectively removing MB. The activation process was optimized, and adsorbent performance was evaluated regarding MB removal efficiency and regeneration potential. Various activation dos-ages were investigated, and comprehensive physicochemical characterization was performed using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), BET (Brunauer–Emmett–Teller) analysis, X-ray fluorescence (XRF), thermogravimetric analysis (TGA), and X-ray diffraction (XRD). The synthesized adsorbents demonstrated exceptional MB removal efficiency (99.593%) and impressive adsorption capacity (22.131 mg/g) when activated with 16 M sodium hydroxide. The adsorption process exhibited spontaneity and exothermicity, as validated by Freundlich and second-order kinetic models. Furthermore, the adsorbents showcased successful regeneration and reusability over three cycles, highlighting their potential for long-term application in water treatment. This study significantly advances water treatment by offering a novel approach to MB removal using base-activated bentonite clay (BABC) adsorbents, contributing to the development of sustainable water treatment solutions.

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Section: Ftir Analysismentioning

confidence: 99%

Optimized Bentonite Clay Adsorbents for Methylene Blue Removal

Hamad,

Idrus,

Yusuf

et al. 2024

Processes

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Acid-base treatment of lightweight expanded clay aggregate (LECA) for removal of paraquat from aqueous media

Pishdadi-Aghdarreh,

Norouzbeigi,

Velayi

2023

Journal of Environmental Chemical Engineering

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Local salt purification in Aceh Timur regency using alkaline (KOH and NaOH) activated bentonite

Wahyuningsih

Muslimah

Yusnawati

2024

CI&CEQ

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The various purification methods have been developed to improve the quality local salt, the NaCl content > 94%. Bentonite is one of materials used as binder impurities in purification. The purpose of the study was to synthesis a modified bentonite using alkaline solution, which includes natrium hydroxide (NaOH) and potassium hydroxide (KOH) with various concentrations (1, 1.5, 2, and 2.5 M) and determined level of Na+, Ca2+ and Mg2+ metals using AAS. The bentonite and activating agent 1 M (1:10) were stirred for three hours. Then, the bentonite was dried for two hours in an oven at 110?C. The activated bentonite was dried for four hours at 170?C. The activated bentonite was characterized using analytical techniques, such as XRD, FTIR, and SEM. The basal spacing d001 on the diffractogram bentonite was significantly unaffected by alkaline activation. FTIR analysis represents the stretching vibration of -OH shifts towards a lower wavenumber. Alkaline activation reduced impurities from bentonite and increase the pore surface's porosity. NaCl levels in people's salt increased after being activated using alkaline. The increase in Na+ levels was followed by decrease content of Ca2+ and Mg2+ metals. KOH-activated bentonite had a higher NaCl level than NaOH-activated bentonite.

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Effect of the Acidic and Alkaline Activation of Bentonite-Like Clays on Sorption Properties in Relation to Fe3+ Ions under Static Conditions

Cited by 5 publications

References 7 publications

Optimized Bentonite Clay Adsorbents for Methylene Blue Removal

Optimized Bentonite Clay Adsorbents for Methylene Blue Removal

Acid-base treatment of lightweight expanded clay aggregate (LECA) for removal of paraquat from aqueous media

Local salt purification in Aceh Timur regency using alkaline (KOH and NaOH) activated bentonite

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