Characterization and kinetics of alumina leaching from calcined Akpugo kaolinite for potential aluminum recovery

Nnanwube, Ikechukwu A.; Onukwuli, Okechukwu Dominic

doi:10.1016/j.sajce.2022.09.014

Cited by 4 publications

(2 citation statements)

References 44 publications

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“…Nnanwube et al proposed alumina leaching with HNO 3 and the findings revealed that nitric acid showed a better efficiency for alumina leaching. 64–66 The result was supported by XRD analysis (Fig. 13a) and the concentration of alumina was checked by ICP-OES.…”

Section: Resultsmentioning

confidence: 76%

Two-step leaching of spent lithium-ion batteries and effective regeneration of critical metals and graphitic carbon employing hexuronic acid

Sahu

Devi

2023

RSC Adv.

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Section: Resultsmentioning

confidence: 76%

Two-step leaching of spent lithium-ion batteries and effective regeneration of critical metals and graphitic carbon employing hexuronic acid

Sahu

Devi

2023

RSC Adv.

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“…Based on the level of reactivity to alumina silica, HCl is more reactive than HNO3. Alumina silica is easily soluble in HCl, both at low concentrations and high concentrations, while alumina can only react with HNO3 at high concentrations [12]. Al2O3 (s) + 6HCl (l) → 2AlCl3 (aq) + 3H2O (l)…”

Section: Effect Of Acid Concentration On Alumina Yieldmentioning

confidence: 99%

An Efficient Extraction and Selective of Alumina from Lapindo Mud

Anggoro,

David,

Alrasyid

et al. 2024

E3S Web Conf.

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Lapindo mud, a soft clay soil found in Sidoarjo, East Java, has a high water and mineral content. It contains 16% alumina (Al2O3), making it a potential source of aluminum metal. The high content of silica oxide in Lapindo mud is of particular interest to separate the oxide from the alumina oxide. Silica oxide is insoluble in acid while aluminum oxide is soluble in acid. The alumina extraction process was carried out using acid solvent. The dried mud with a size of ≤100 mesh was extracted using HNO3 and HCl solvent with concentration of 4, 6, and 8 M at temperatures of 60℃, 70℃, and 80℃ for 100, 200, and 300 minutes. The extraction results were filtered, then the pH of the filtrate was adjusted to 12 with 6 M NaOH. The filtrate was filtered, thus Fe3+ was obtained as a residue. The filtrate was neutralized to pH 8 using 6 M HCl. The filtrate was filtered to obtain NaAlO2. The precipitate formed was washed using distilled water and dried in an oven to obtain Al(OH)3. Al(OH)3 was then calcined at 600℃ for four hours to form Al2O3. The results showed that acid solvent concentration, extraction temperature, and heating time affected the mass of Al2O3 obtained. Increasing acid solvent concentration, extraction temperature, and heating time, increases the mass of Al2O3 obtained. The mass of Al2O3 obtained was 1.19 grams for HNO3 solvent and 1.63 grams for HCl solvent with concentration of 8 M, extraction temperature of 80℃, and heating time of 300 minutes. The results of XRF characterization show that the Al3O3 purity level is 42.8% and 27.3%with HNO3 and HCl solvent, respectively.

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Treatment of landfill leachate using kaolin-alumina membranes: a focus on performance evaluation

Chougui,

Vieillard,

Bouabbaci

et al. 2024

emergent mater.

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Characterization and kinetics of alumina leaching from calcined Akpugo kaolinite for potential aluminum recovery

Cited by 4 publications

References 44 publications

Two-step leaching of spent lithium-ion batteries and effective regeneration of critical metals and graphitic carbon employing hexuronic acid

Two-step leaching of spent lithium-ion batteries and effective regeneration of critical metals and graphitic carbon employing hexuronic acid

An Efficient Extraction and Selective of Alumina from Lapindo Mud

Treatment of landfill leachate using kaolin-alumina membranes: a focus on performance evaluation

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