Applications of aluminum oxide and nano aluminum oxide as adsorbents: review

Hami, Hawraa Kassem; Abbas, Ruba Fahmi; Eltayef, Emad Mahmoud; Mahdi, Neda Ibrahim

doi:10.54153/sjpas.2020.v2i2.109

Cited by 25 publications

(8 citation statements)

References 30 publications

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“…Furthermore, the adsorption capacity of AC can be enhanced by modification and functionalization using metal oxides [19], polymers [22], and surfactants [23], amongst others. Metal oxides are widely used in the removal of contaminants because they are cheap and broadly manufactured; they also have high mechanical properties and resistance to thermal decomposition [24].…”

Section: Introductionmentioning

confidence: 99%

“…In this study, AC derived from waste banana peels modified with chitosan and Al 2 O 3 nanoparticles (BPAC@Al 2 O 3 @chitosan) was used as an adsorbent for the removal of Pb 2+ and Cd 2+ . Aluminum oxide (Al 2 O 3 ) nanoparticles were chosen because they have a high surface area, are chemically stable, non-poisonous, easy to use, and also have many hydroxide groups, which makes them suitable adsorbents [24]. Nanoparticles have a mean diameter of 53 nm, and the modified diameter ranges from 68 to 87 nm [25].…”

Section: Introductionmentioning

confidence: 99%

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Application of Activated Carbon Banana Peel Coated with Al2O3-Chitosan for the Adsorptive Removal of Lead and Cadmium from Wastewater

Ramutshatsha-Makhwedzha

Mbaya

Mavhungu

2022

Materials

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This study was aimed at evaluating the adsorption capacity of novel banana peel activated carbon (BPAC) modified with Al3O2@chitosan for the removal of cadmium (Cd2+) and lead (Pb2+) from wastewater. Characterization techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transformed infrared (FTIR) spectroscopy, and Brunauer–Emmett–Teller analysis confirmed the synthesized BPAC@Al3O2@chitosan composite material. The univariate approach was used to study the influence of different experimental parameters (such as adsorbent mass, sample pH, and contact time) that affects simultaneous removal of Cd2+ and Pb2+ ions. Kinetic results showed that adsorption favored the pseudo-second-order kinetic model, whereas the adsorption of Cd2+ and Pb2+ was best described by the Langmuir model and the adsorption capacity for Cd2+ and Pb2+ was 46.9 mg g−1 and 57.1 mg g−1, respectively, for monolayer adsorption. It was shown the BPAC composite can be re-used until the third cycle of adsorption–desorption (% Re > 80). Based on the obtained results, it can be concluded that the prepared BPAC@Al3O2@chitosan composite material is cost effective, as it is generated from waste banana peels and can be re-used. In addition, the prepared material was able to remove Cd2+ and Pb2+ up to 99.9%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of Activated Carbon Banana Peel Coated with Al2O3-Chitosan for the Adsorptive Removal of Lead and Cadmium from Wastewater

Ramutshatsha-Makhwedzha

Mbaya

Mavhungu

2022

Materials

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“…Metal and metal oxide nanoparticles are an emerging group of nanomaterials due to their unique physicochemical characteristics and vast application in various scientific fields, including biomedicine [ 2 ], tissue engineering [ 3 ], biosensing technology [ 4 ], food packaging [ 5 ], catalysis [ 6 ], nanoelectronics [ 7 ], nanorobotics [ 8 ], and environmental sciences [ 9 ]. Recently, aluminum oxide nanostructures have been a subject of considerable research interest to the scientific community due to their unique optical, electronic, piezoelectric, and biomedical properties [ 10 ]. They find potential applications in pharmaceutics, photochemical products, ceramics, paints, additives, and catalysis [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Grapefruit Extract-Mediated Fabrication of Photosensitive Aluminum Oxide Nanoparticle and Their Antioxidant and Anti-Inflammatory Potential

et al. 2022

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Aluminum oxide nanoparticles (Al2O3 NPs) were synthesized using a simple, eco-friendly green synthesis approach in an alkaline medium from the extract of grapefruit peel waste. The pre-synthesized, nano-crystalline Al2O3 NPs were characterized by using spectroscopic (UV–vis, FTIR, XRD, and EDX) and microscopic (SEM and TEM) techniques. The formed Al2O3 NPs exhibited a pronounced absorption peak at 278 nm in the UV–vis spectrum. The average particle size of the as-prepared Al2O3 NPs was evaluated to be 57.34 nm, and the atomic percentages of O and Al were found to be 54.58 and 45.54, respectively. The fabricated Al2O3 NPs were evaluated for antioxidant, anti-inflammatory, and immunomodulatory properties. The Al2O3 NPs showed strong antioxidant potential towards all the four tested assays. The anti-inflammatory and immunomodulatory potential of Al2O3 NPs was investigated by measuring the production of nitric oxide and superoxide anion (O2•−), as well as proinflammatory cytokines tumour necrosis factor (TNF-α, IL-6) and inhibition of nuclear factor kappa B (NF- κB). The results revealed that Al2O3 NPs inhibited the production of O2•− (99.4%) at 100 μg mL−1 concentrations and intracellular NO•− (55%), proinflammatory cytokines IL-6 (83.3%), and TNF-α (87.9%) at 50 μg mL−1 concentrations, respectively. Additionally, the Al2O3 NPs inhibited 41.8% of nuclear factor kappa B at 20 μg mL−1 concentrations. Overall, the outcomes of current research studies indicated that Al2O3 NPs possess anti-inflammatory and immunomodulatory properties and could be used to treat chronic and acute anti-inflammatory conditions.

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“…The rest of production undergo large chemical and thermal treatments, size dimensions classification, as well as other required finishing operations for being used in the wide-ranging new high technology applications. Aluminum hydroxide and its related products highly required on the market are very important materials with various industrial applications, mainly as: filers and fire retardants [7][8][9][10][11][12][13][14][15][16][17][18][19], desiccants [20][21][22][23][24][25][26], adsorbents and water purification reactants [27][28][29][30][31][32][33][34][35][36][37], coating materials [38][39][40][41][42][43][44][45][46][47], composite materials [48][49][50][51][52]…”

Section: Introductionmentioning

confidence: 99%

Short review on mechanical activation in non-metallurgical alumina production

Kim¹,

Dobra²,

Isopescu³

et al. 2022

RJEEC

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The terms mechano-chemistry and mechanical activation of solid materials were introduced in chemical literature by Ostwald at the beginning of the XX century. Both terms cover a whole range of interconnected phenomena taking place during the mechanical action on solids or their separate parts participating in chemical reactions, phase transitions, mixing and creating composite materials, alloying and crystal growth in the solid state, deformation and changing physical and thermal properties, all of them at low temperature. The common effects of the mechanical activation on solid material are fracturing and reduction of particle sizes, generation of new reactive surfaces, diffusion of atoms of the reactant phase through the product phase, and quite significantly, accumulating energy in crystalline or amorphous structure (enough twists in atomic and molecular networks, tensions in atomic bond and active sites to trigger the nucleation of new phases). Mechanical activation is very used to produce all clean alumina mineralogical phases with uniform particle size dimensions from nano to macro size. Also, mechanical activation may extend the specific surface of some minerals, enhancing the yields in the solid-liquid extraction process. With adequate precursors, all phase transitions from amorphous to alfa α-Al2O3 can be carried out on the same route as in thermally activated alumina, but some other routes, impossible by thermal activation, might be followed. The difference between the two activation ways is that mechanical activation is made at room temperature.

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Applications of aluminum oxide and nano aluminum oxide as adsorbents: review

Cited by 25 publications

References 30 publications

Application of Activated Carbon Banana Peel Coated with Al2O3-Chitosan for the Adsorptive Removal of Lead and Cadmium from Wastewater

Application of Activated Carbon Banana Peel Coated with Al2O3-Chitosan for the Adsorptive Removal of Lead and Cadmium from Wastewater

Grapefruit Extract-Mediated Fabrication of Photosensitive Aluminum Oxide Nanoparticle and Their Antioxidant and Anti-Inflammatory Potential

Short review on mechanical activation in non-metallurgical alumina production

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